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as
Accelerometers, Gyros, and Temperature Sensors January 2009
September 2008 Configurable high-g iMEMS Accelerometer The ADXL180 single-axis iMEMS accelerometer is configurable to provide ±50-g to ±500-g full-scale range, 100-Hz to 800-Hz filter bandwidth, and 8-bit or 10-bit resolution, making it ideal for front- and side-impact airbag applications. Sending acceleration data to the vehicle’s command module via a 2-wire current loop, its communications protocol is programmable for compatibility with various automotive interface-bus standards. Each device has a unique electronic serial number. Two devices can be synchronized to operate on the same bus. The ADXL180 operates on a single 5-V to 14.5-V supply. Available in a 16-lead LFCSP package, it is specified from –40°C to +125°C and priced at $8.64 in 1000s. July 2008 Micropower Temperature Trip-Point Switches in space-saving SOT-23
The
ADT6401
and
ADT6402
micropower trip-point temperature switches measure their local temperature
with 0.125°C resolution and ±0.5°C typical accuracy—and activate a logic
output when the temperature goes above or below a pin-selectable threshold.
The ADT6401 (active-low,
open-drain output) and ADT6402
(active-high, push-pull output) offer pin-selectable trip-points, set in
10°C increments from –45°C to +5°C for under-temperature sensing or +45°C to
+115°C for over-temperature sensing, and pin-selectable hysteresis of 2°C or
10°C. Operating on a single 2.7-V to 5.5-V supply, the ADT6401/02 consume 50
μA max. Available in 6-lead April 2008 High-accuracy Dual-Axis Inclinometer/Accelerometer
The
ADIS16209 accelerometer/inclinometer combines a
dual-axis accelerometer with an embedded signal processor to provide
low-cost, low-power, functionally complete dual-axis sensing, with digital
outputs—via a serial peripheral-interface (SPI) port. It provides
acceleration- and inclination data with 14-bit resolution—and temperature
data with High-precision three-axis Inertial Sensor
The
ADIS16355 complete inertial sensing system
includes a 3-axis gyroscope with ±75°/s, ±150°/s, and ±300°/s range
settings, a Yaw-Rate Gyroscope
The
ADXRS613 gyroscope uses surface
micromachining—the same process used to make high-volume, high-reliability
automotive airbag accelerometers—to produce a low-cost, functionally
complete angular-rate sensor—and integrates it with all of the
signal-conditioning electronics required to produce a stable output voltage
proportional to the angular rate about the
z-axis. The output is ratiometric
to an external reference, with 12.5-mV/°/s sensitivity over a March 2008 Wideband Yaw-Rate Gyroscope has SPI interface
The
ADIS16060 yaw-rate gyroscope provides a digital
output proportional to the angular rate about the Z-axis (yaw) for rates up
to High-precision Angular Rate Sensor
The
ADIS16130 high-precision angular rate sensor
provides a digital output proportional to the angular rate about the Z-axis
(yaw) for rates up to ±250°/s. Featuring 0.0125°/s/rt-Hz
low-rate noise density, the highly stable design minimizes output variations
due to temperature, voltage, linear acceleration, vibration, and next-level
assembly. A 24-bit sigma-delta ADC digitizes the output of a
high-reliability iMEMS® gyroscope and the internal temperature sensor, and
provides the data via an SPI-compatible interface. The temperature output
facilitates system-level calibration; a digital self-test feature exercises
the mechanical structure and enables system-level diagnostics. Operating
with a single 5-V supply, the ADIS16130 consumes 365 mW. Available in a
compact 24-pin High-precision three-axis Inertial Sensor
The
ADIS16354 complete inertial sensing system
includes a 3-axis gyroscope with ±75°/s, ±150°/s, and ±300°/s range
settings, a Micropower Temperature Trip Point Switches in space-saving SOT-23 The ADT6503 and ADT6504 micropower trip-point temperature switches measure their local temperature with 0.125°C resolution and ±0.5°C typical accuracy—and activate a logic output when the temperature goes lower than a preset trip point. The ADT6503 (active-low, open-drain output) and ADT6504 (active-high, push-pull output) offer factory-set presets from –45°C to +15°C in 10°C increments, and pin-selectable hysteresis of 2°C or 10°C. Operating on a single 2.7-V to 5.5-V supply, the ADT6503/04 consume 50 μA max. Available in 5-lead SOT-23 packages, they are specified from –55°C to +125°C and priced at $0.49 in 1000s. Search for more information on MEMS Search for more information on Sensors January 2009
December 2008
November 2008 Dual ultralow-noise Operational Amplifier consumes only 1.8 mA per channel The ADA4075-2 dual, high-performance, low-noise op amp combines excellent ac and dc characteristics with low power consumption, making it ideal for precision instrumentation, professional audio, and other high-density applications. Manufactured on ADI’s proprietary iPolar® process, it features 2.8-nV/rt-Hz broadband noise, 0.0002% distortion (THD+N), 12-V/μs slew rate, 6.5-MHz bandwidth, 200-μV offset, 118-dB common-mode rejection, 117-dB open-loop gain, and 110-dB power-supply rejection. Operating on ±4.5-V to ±18-V supplies, the ADA4075-2 consumes 1.8 mA per amplifier. Available in an 8-lead SOIC package, it is specified from –40°C to +125°C and priced at $0.75 in 1000s. Quad micropower Operational Amplifier features zero crossover distortion The ADA4505-4 quad micropower operational amplifier features rail-to-rail input- and output range and zero crossover distortion, ensuring true single-supply operation. Its low power consumption, 105-dB common-mode rejection, 110-dB power-supply rejection, 120-dB open-loop gain, and 0.5-pA bias currents make it ideal for remote sensors, handheld instrumentation, and other battery-powered applications. Operating on a single 1.8-V to 5-V supply or dual ±0.9-V to ±2.5-V supplies, the ADA4505-4 consumes a maximum of 10 μA per amplifier. Available in a 14-lead TSSOP package, it is specified from –40°C to +125°C and priced at $1.15 in 1000s. October 2008 Programmable-gain Instrumentation Amplifier provides gains of 1 to 1000
The
AD8253 programmable-gain instrumentation amplifier features 1-gigaohm
input impedance, 150-μV offset, Precision, low-distortion Difference Amplifier
The
AD8274 high-performance, low-distortion difference amplifier includes
internal gain-setting resistors. With no external components, it can be
configured for differential gains of 0.5 or 2. It can also be configured in five
single-ended configurations, with gains ranging from −2 to +3. It features 0.03%
max gain error, 2-ppm/°C max gain drift, 700-μV max offset, 83-dB min
common-mode rejection, September 2008 Precision Instrumentation Amplifier features 1 ppm/°C gain drift
The
AD8228 high-performance instrumentation amplifier uses on-chip
laser-trimmed gain-setting resistors, allowing it to achieve higher accuracy
and lower drift than typical instrumentation amplifiers. Featuring 0.02% max
gain error, Fixed-gain Instrumentation Amplifiers feature 20 nV/°C offset drift The AD8293G80 and AD8293G160 fixed-gain (80× and 160×) instrumentation amplifiers incorporate all gain-setting- and filter resistors—and a reference buffer—minimizing the number of external components. Only two external capacitors are required to implement a complete sensor amplifier with 2-pole filter. Featuring 20-µV max offset voltage, 0.3-µV/°C max offset drift, 100-dB min common-mode rejection, 0.7-µV p-p noise, and rail-to-rail outputs, they are ideal for precision pressure sensors, medical instrumentation, and strain-gage amplifiers. Operating on a single 1.8-V to 5.5-V supply, the AD8293 consumes 1.3 mA max. Available in 8-lead SOT-23 packages, they are specified from –40°C to +85°C and priced from $0.99 in 1000s. Quad Parametric Measurement Unit includes 16-bit level-setting DACs The AD5522 parametric measurement unit (PMU) comprises four channels, each of which can force a voltage and measure the corresponding current—or force a current and measure the voltage—at a single pin in automatic test equipment. Programmable force/measure current ranges include ±5 μA, ±20 μA, ±200 μA, and ±2 mA using the internal sense resistors—and up to ±80 mA using an external sense resistor. Higher currents can be achieved by using an external amplifier. Voltages can be forced and measured to within 4 V of the supply rails. Force/sense measurement capability—and a guard output to drive the shield of the force/sense pair—ensure high accuracy and low noise at the tester pin. Voltage- and current clamps keep the outputs within a safe range; a window comparator flags measurements that are outside preset limits. Each PMU channel includes five 16-bit DACs that set the programmable levels for the force voltage input, comparator inputs, and clamp inputs. The AD5522 operates on +5-V and ±15-V supplies. Available in an 80-lead TQFP package with an exposed paddle for cooling, it is specified from +25°C to +90°C and priced at $39.00 in 1000s. Quad micropower Operational Amplifier features zero crossover distortion The AD8508 quad micropower operational amplifier features rail-to-rail input- and output swings and zero crossover distortion, ensuring true single-supply operation. Its low power requirement, 105-dB common-mode rejection, 110-dB power-supply rejection, 120-dB open-loop gain, and 1-pA bias currents make it ideal for remote sensors, handheld instrumentation, and other battery-powered applications. Operating on a single 1.8-V to 5-V supply or dual ±0.9-V to ±2.5-V supplies, the AD8508 consumes a maximum of 20 μA per amplifier. Available in a 14-lead TSSOP package, it is specified from –40°C to +125°C and priced at $1.20 in 1000s. Dual micropower Operational Amplifier features zero crossover distortion The
ADA4505-2 dual micropower operational amplifier
features rail-to-rail input- and output swings and zero crossover
distortion, ensuring true single-supply operation. Its low power
requirement, 105-dB common-mode rejection, 110-dB power-supply rejection,
500-MHz Pin Electronics IC includes driver, comparator, active load, and PMU The ADATE302-02 pin electronics SoC performs the automatic-test-equipment (ATE) functions of driver, comparator, and active load (DCL)—at speeds of up to 500 MHz. It also provides a per-pin parametric measurement unit (PMU) and dc level setting. The PMU can force or measure voltage or current—and measure voltage or current—on a per-pin basis. Programmable force/measure current ranges include ±2 μA, ±20 μA, ±200 μA, ±2 mA, and ±25 mA. The proprietary driver features three active-mode output levels—logic high, logic low, and term—and a high-impedance inhibit mode. Its –2-V to +6-V voltage range accommodates a wide variety of test devices. A high-voltage buffer can source voltages up to 13.5 V. High-speed window- and differential comparators facilitate functional testing. On-chip 14-bit DACs set the dc levels for the driver, comparator, and active load (DCL); a 16-bit DAC provides precision levels for the PMU. A dual device, it can be used to support two single-ended drive/receive channels or a single differential channel. Operating on –5.75-V, +3.3-V, +10-V, and +16.75-V supplies, the ADATE302-02 consumes 1.7 W per channel. Available in an 84-ball BGA package, it is specified from –40°C to +85°C and priced at $45.00 in 1000s. 250-MHz Pin Electronics IC includes driver, comparator, active load, and PMU The ADATE305 pin electronics SoC performs the automatic-test-equipment (ATE) functions of driver, comparator, and active load (DCL)—at speeds of up to 250 MHz. It also provides a per-pin parametric measurement unit (PMU) and dc level setting. The PMU can force or measure voltage or current—and measure voltage or current—on a per-pin basis. Programmable force/measure current ranges include ±2 μA, ±20 μA, ±200 μA, ±2 mA, and ±32 mA. The proprietary driver features three active-mode output levels—logic high, logic low, and term—and a high-impedance inhibit mode. Its –2-V to +6-V voltage range accommodates a wide variety of test devices. A high-voltage buffer can source voltages up to 13.5 V. High-speed window- and differential comparators facilitate functional testing. On-chip 14-bit DACs set the dc levels for the driver, comparator, and active load (DCL); a 16-bit DAC provides precision levels for the PMU. A dual device, it can be used to support two single-ended drive/receive channels or a single differential channel. Operating on –5.75-V, +3.3-V, +10-V, and +16.75-V supplies, the ADATE305 consumes 900 mW per channel. Available in a 100-lead TQFP package, it is specified from –40°C to +85°C and priced at $35.00 in 1000s. July 2008 Dual Pin Driver supports 4-Gbps data rates The ADATE209 dual 3-level pin driver is designed for testing DDR2/DDR3 memory, PCI Express 1.0, HDMI, and other high-speed devices. Able to deliver high-fidelity output swings from 200 mV to 4 V over a –1-V to +3.5-V range, its key high-speed performance specifications are: 110-ps rise/fall times and 4.4-Gbps data rate with a 2-V swing, and 150-ps rise/fall times and 3.2-Gbps data rate with a 3-V swing. It provides high-speed transitions into/out of termination mode and built in peaking/pre-emphasis circuitry to compensate for cable losses. Operating on –4.5-V and +7-V supplies, the ADATE209 dissipates 870 mW. Available in a 49-ball CSPBGA package, it is specified from –40°C to +85°C and priced at $36.00 in 1000s. June 2008 Transceiver combines high-current driver amplifier and digital VGA
The
AD8260 transceiver combines a high-current driver
amplifier—usable as a transmitter—with a low-noise, digitally programmable
variable-gain amplifier (DGA)—usable as a receiver. Intended for power-line
communications, automatic gain-control (AGC), and general-purpose Tx/Rx
signal processing, it is fabricated on an eXtra-Fast Complementary Bipolar
(XFCB) process. The driver amplifier features differential inputs and
outputs, 1.5× preset gain, 195-MHz bandwidth, and ±300-mA drive capability.
The DGA features a single-ended input and differential outputs, Precision rail-to-rail dual Operational Amplifier operates with 5-V to 16-V supply The AD8639 precision dual op amp uses auto-zero technology to measure and correct offset voltage, making it useful for sensor signal conditioning, medical instrumentation, and precision current sensing. DC specifications include 3-μV offset, 40-nV/°C drift, 1.5-pA bias current, 133-dB common-mode rejection, and 136-dB open-loop gain. AC specifications include 1.35-MHz unity-gain bandwidth, and 2.5-V/μs slew rate. The input range extends to the negative rail, and the output can swing to within 30 mV of either rail, providing true single-supply capability. Operating with a single 4.5-V to 16-V supply, the AD8639 consumes 1 mA per amplifier. Available in 8-lead LFCSP, MSOP and SOIC packages, it is specified from –40°C to +125°C and priced at $2.19 in 1000s. High-speed Operational Amplifiers feature low distortion, low power, low noise
The single
ADA4857-1 and dual
ADA4857-2 high-speed,
ultralow-distortion, voltage-feedback operational amplifiers feature 850-MHz
bandwidth (–3 dB), 2800-V/μs slew rate, 88-dBc spurious-free dynamic range
(SFDR) at 10 MHz, and 4.4-nV/rt-Hz noise. Unity-gain stable, they are ideal
for use in a variety of applications, including ultrasound, ATE, active
filters, and ADC drivers. Specified from High-speed Operational Amplifier features low distortion, low noise, high-voltage operation
The
ADA4898-1 high-voltage, low-distortion,
voltage-feedback operational amplifier features 65-MHz bandwidth Differential ADC Drivers have extremely low harmonic distortion
The single
ADA4939-1 and dual
ADA4939-2 low-noise,
ultralow-distortion, high-speed differential ADC drivers are designed to
interface directly with high-performance ADCs having up to 16-bit
resolution. They feature 1.4-GHz bandwidth, 6800-V/μs slew rate, March 2008 High-voltage Current-Shunt Monitor The AD8215 high-voltage unidirectional current-shunt monitor, designed for industrial and automotive environments, provides a unipolar output voltage proportional to the current flowing through an external shunt resistor. Featuring a fixed gain of 20 V/V, with ±0.15% max gain error and 8-ppm/°C gain drift, it can tolerate input common-mode voltages ranging from –2 V to +65 V. Specifying ±1-mV max offset error and 6-μV/°C offset drift, referred to the input (RTI), it has a 0-to-250-mV differential input voltage range, with 120-dB common-mode rejection. The buffered voltage output can directly drive an ADC in a variety of motor-control, solenoid-control, and battery-management applications. Operating on a single 4.5-V to 5.5-V supply, the AD8215 consumes 6.5 mW. Available in an 8-lead SOIC package, it is specified from –40°C to +125°C and priced at $1.20 in 1000s. Precision two-channel Difference Amplifier The AD8270 high-performance, low-distortion difference amplifier includes internal gain-setting resistors. With no external components, it can be configured for differential gains of 0.5, 1, or 2. It can also be configured in over 40 single-ended configurations, with gains ranging from −2 to +3. At unity gain, it features 0.08% max gain error, 1-ppm/°C gain drift, 300-μV offset, 92-dB common-mode rejection, –145-dB harmonic distortion, 15-MHz bandwidth, and 30-V/μs slew rate, making it ideal for building instrumentation amplifiers, level translators, and automatic test equipment. Operating on ±2.5-V to ±18-V supplies, the AD8270 consumes 2.3 mA per amplifier. Available in a 16-lead LFCSP package, it is specified from –40°C to +85°C and priced at $1.89 in 1000s. Two-channel Audio Difference Amplifier
The
AD8273 low-distortion audio difference amplifier includes internal
gain-setting resistors, allowing each channel to be configured independently
with no external components—in
difference- (G = 0.5 or 2);
inverting- (G = 0.5 or 2); or
non-inverting (G = 1.5 or 3) modes. With the gain set to 0.5, it
features 0.05% max gain error, 2-ppm/°C gain drift, Amplifiers and Comparators Home Page Search for more information on Amplifiers Search for more information on Comparators December 2008
June 2008 Intelligent Battery Sensor for 12-V automotive applications The ADuC7034 precision battery sensor precisely monitors a battery’s voltage, current, and temperature—in order to characterize its state-of-health (SOH) and state-of-charge (SOC) in automotive applications. The device integrates two simultaneous-sampling 16-bit, 8-kHz sigma-delta ADCs, a temperature sensor, a 5-ppm/°C voltage reference, 32 Kbytes of flash memory, 4 Kbytes or RAM, and all necessary signal-conditioning functions. On-chip regulation and attenuation facilitate operation directly from 3.5-V to 18-V car batteries. The on-chip ARM7TDMI 16-/32-bit RISC microcontroller processes the acquired data; the LIN transceiver communicates the battery’s SOH and SOC data to the car’s electronic control unit (ECU). The ADuC7034 consumes 10 mA in normal mode and 300 μA in power-down mode. Available in a 48-lead LFCSP package, it is specified from –40°C to +115°C and priced at $6.29 in 1000s. Analog Microcontrollers Home Page Search for more information on Analog Microcontrollers Analog-to-Digital Converters (ADCs) January 2009
December 2008
November 2008 16-input, 16-output Analog I/O Port includes 8 uncommitted op amps The AD5590 analog I/O port comprises 16 analog input channels, 16 analog output channels, and eight uncommitted op amps, making it ideal for use in optical line-cards, base-stations, and other applications that require closed-loop monitoring and control of multiple parameters. The 16 analog inputs are multiplexed into a 12-bit, 1-Msps, successive-approximation ADC, which includes a low-noise, wideband track-and-hold amplifier. A sequencer enables sequential conversion of a preprogrammed selection of channels. The 16 analog outputs are provided by two sets of eight 12-bit voltage-output DACs. Each group is driven by its own on-chip 1.25-/2.5-V reference or by an external reference. Any or all DACs can be updated simultaneously, and all DACs can be cleared to zero, mid-scale, or full scale. The eight uncommitted single-supply, low-noise amplifiers can be used for signal conditioning tasks. The AD5590 operates on a single 4.5-V to 5.25-V supply. Available in a 10-mm × 10-mm 80-ball CSPBGA package, it is specified from –40°C to +85°C and priced at $21.25 in 1000s. September 2008 6-channel, simultaneous sampling 16-/14-/12-bit, 250-ksps Successive-Approximation ADCs
The
AD7656-1/AD7657-1/AD7658-1 six-channel,
simultaneously sampling 16-/14-/12-bit, 250-ksps successive-approximation ADCs combine six
high-speed, low-power ADCs and six wideband, low-noise track-and-hold
amplifiers in a single package. Pin compatible with the
AD7656/AD7657/AD7658, the -1 version offers reduced decoupling requirements. Three
convert-start inputs allow independent simultaneous sampling of
three ADC pairs. The devices accept true bipolar inputs—with selectable
full-scale ranges of ±5 V or ±10 V—and provide both serial and parallel
outputs. The successive-approximation architecture ensures that there will
be no pipeline delays. The 16-bit version features 88-dB
signal-to-noise-plus-distortion (SINAD), –105-dB total harmonic distortion
(THD), Variable-resolution Resolver-to-Digital Converter provides 10-bit to 16-bit data The AD2S1210 complete tracking resolver-to-digital converter provides digital outputs representing the input angular position and velocity. The resolution, from 10 bits to 16 bits, is set by the user. An on-chip programmable sine-wave oscillator provides an excitation signal for the resolver. Accepting 3.15-V p-p (±27%) sine- and cosine input signals in the 2-kHz to 20-kHz range, the converter uses a Type-II servo loop to track the inputs, achieving a 3125-rps tracking rate and ±2.5-arc-minute accuracy with an 8.192-MHz clock. Operating on a single 4.75-V to 5.25-V supply, the AD2S1210 consumes 195 mW. Available in a 48-lead LQFP package, it is specified from –40°C to +125°C and priced from $12.00 in 1000s. August 2008 Dual 12-bit, 1-Msps, simultaneous-sampling Successive-Approximation ADC The AD7262 dual successive-approximation ADC includes all of the functions needed for monitoring position-feedback signals in motor-control systems. It achieves 12-bit accuracy at sampling rates up to 1 Msps. Both ADCs are preceded by true-differential-input programmable-gain amplifiers (PGAs) and wideband track-and-hold amplifiers. PGA gain can be set to 14 values, from 1× to 128×, establishing the ±VREF/(2×gain) full-scale analog input range. The twin signal paths allow simultaneous conversion of two inputs. Output data is available simultaneously on separate data lines—or in succession on a single data line to feed a single serial port. Four on-chip comparators—two optimized for low power and two optimized for high speed—are ideal for monitoring signals from pole sensors or Hall-effect sensors. The on-chip 2.5-V reference can be overridden by an external system reference. Operating with a 4.75-V to 5.25-V supply, the AD7262 consumes 105 mW in normal mode and 2.6 µW in power-down mode. Available in a 48-lead LFCSP package, it is specified from –40°C to +105°C and priced at $5.50 in 1000s. An economical 500-ksps version is priced at $4.10 in 1000s. Isolated Sigma-Delta Modulator The AD7401A second-order sigma-delta modulator features no-missing-codes to 16 bits, ±2-LSB integral nonlinearity, 25-μV offset, and 1-μV/°C offset drift. Ideally suited for current-shunt monitoring in motor-control systems, it converts an analog input within a ±250-mV range into a 1-bit data stream with a bit rate up to 20 MHz. The density of ones in the bit stream provides a representation of the analog input, which can be reconstructed digitally with an external digital filter. Continuous sampling of the analog input eliminates the need for a sample-and-hold. The serial interface is isolated using iCoupler® technology, which provides 3,750-V rms isolation per UL 1577 standards. Operating with a 4.5-V to 5.5-V analog supply and a 3-V to 5.5-V logic supply, the AD7401A consumes 93.5 mW. Available in a 16-lead SOIC package, it is specified from –40°C to +125°C and priced at $4.00 in 1000s. July 2008 4-/8-channel, 16-bit, 250-ksps Successive-Approximation ADCs
The
AD7682/AD7689
4-/8-channel, 16-bit, 250-ksps successive-approximation ADCs combine a
multiplexer, selectable single-pole low-pass filter, and 16-bit sampling
ADC, with a low-drift buffered reference, temperature sensor, channel
sequencer, and SPI-compatible interface. The multiplexer accepts
single-ended unipolar, pseudo-differential bipolar, or fully differential
inputs with a full-scale range of 0 to VREF. The reference can be
internal (2.5 V or 4.096 V) or external (up to 4.096 V, using the buffer, or
up to VDD, bypassing the buffer). The successive-approximation
architecture ensures no pipeline delays. Specifications include 92.5-dB
signal-to-noise-plus-distortion (SINAD), –100-dB total harmonic distortion
(THD), 8-channel, 14-bit, 250-ksps Successive-Approximation ADC
The
AD7949 8-channel, 14-bit, 250-ksps
successive-approximation ADC combines a multiplexer, selectable single-pole
low-pass filter, and 14-bit sampling ADC, with a low-drift buffered
reference, temperature sensor, channel sequencer, and SPI-compatible
interface. The multiplexer accepts single-ended unipolar,
pseudo-differential bipolar, or fully differential inputs with a full-scale
range of 0 to VREF. The reference can be internal (2.5 V or 4.096
V), or external (up to 4.096 V, using the buffer, or up to VDD,
bypassing the buffer). The successive-approximation architecture ensures no
pipeline delays. Specifications include 85-dB
signal-to-noise-plus-distortion (SINAD), –100-dB total harmonic distortion
(THD), ±0.5-LSB integral nonlinearity (INL), and ±0.25-LSB differential
nonlinearity (DNL). Operating on a 2.3-V to 5.5-V supply, the AD7949
consumes 10.8 mW at 250 ksps, 1.45 mW at 100 ksps, and 1.5 μW at 100 sps.
Available in a 20-lead LFCSP package, it is specified from June 2008 12-bit Capacitance-to-Digital Converters
The two-channel
AD7152 and single-channel
AD7153
capacitance-to-digital converters interface with single-ended or
differential floating capacitive sensors. A 12-bit sigma-delta converter
measures the capacitance with no missing codes and 0.05% linearity. Four
input ranges are available in both differential mode (from ±0.25 pF to ±2
pF) and single-ended mode (0.5 pF, 1 pF, 2 pF, and 4 pF). An on-chip
digital-to-capacitance converter
can balance common-mode capacitance of up to 5 pF. Operations can be
programmed—and data can be read—via an I2C-compatible interface.
Operating with a single 2.7-V to 3.6-V supply, the AD7152/53 consume 100 μA
in normal mode and 1 µA in
power-down mode. Available in
Dual 14-bit, 1-Msps, simultaneous-sampling Successive-Approximation ADC The AD7264 dual successive-approximation ADC includes all of the functionality needed for monitoring position-feedback signals in motor-control systems. It achieves 14-bit accuracy at sampling rates up to 1 Msps. Each ADC is preceded by a true-differential-input programmable-gain amplifier (PGA) and a wideband track-and-hold amplifier. The PGA gain can be set between 1× and 128× in 14 steps, establishing the ±VREF/2×gain full-scale analog input range. The twin signal paths allow simultaneous conversion of two inputs. Output data is simultaneously available on separate data lines—or in succession on a single data line if only one serial port is available. Four on-chip comparators—two optimized for low power and two optimized for high speed—are ideal for monitoring signals from pole sensors or Hall-effect sensors. The on-chip 2.5-V reference can be overdriven by an external system reference. Operating with a 4.75-V to 5.25-V supply, the AD7264 consumes 105 mW in normal mode and 2.6 µW in power-down mode. Available in a 48-lead LFCSP package, it is specified from –40°C to +105°C and priced at $6.50 in 1000s. Isolated Sigma-Delta Modulator
The
AD7400A second-order sigma-delta modulator
features no-missing-codes to 16 bits, ±2-LSB integral nonlinearity, 50-μV
offset, and 1.5-μV/°C offset drift. Ideally suited for current-shunt
monitoring in motor-control systems, it converts an analog input within a
March 2008 12-bit Measurement and Control System
The
AD7294 integrates all of the functions required
for monitoring and control of current, voltage, and temperature, allowing
precise control of a cellular base-station’s power amplifier. It is also
useful in automotive, industrial-control, February 2008 CapTouch™ Capacitance-to-Digital Converter reads single-electrode sensors
The
AD7148
capacitance-to-digital converter’s eight input channels interface with
single-electrode capacitive sensors, such as button arrays, scroll bars, and
scroll wheels. A 16-bit, 250-kHz sigma-delta converter measures the
capacitance, senses changes, and indicates sensor activation. On-chip
circuitry automatically calibrates the converter to compensate for changes
in temperature and humidity, thus eliminating false or non-registering
touches. Data- and control signals are transferred via an I2C-compatible
interface. Operating on a single 2.6-V to 3.6-V supply, the AD7147 consumes
900 μA in full-power mode, 15.5 μA
in low-power mode, and 2.3 μA in
shutdown mode. Available in a
4-channel, 12-/10-/8-bit, 140-ksps Successive-Approximation ADCs The AD7991/AD7995/AD7999 successive-approximation ADCs provide 12-/10-/8-bit resolution at sampling rates up to 140-ksps. The input multiplexer accepts four single-ended inputs using the power supply voltage as the reference—or three inputs with an external voltage reference; the track-and-hold amplifier can handle input frequencies up to 14 MHz. All data and commands are transmitted via a 2-wire I2C-compatible serial interface, which supports standard, fast, and high-speed modes. A sequencer allows automatic conversion of the selected channels. Automatic power-down between conversions minimizes power consumption. Operating with a single 2.7-V to 5.5-V supply, the AD7991/95/99 consume 1.38 mW in normal mode, 0.88 mW in power-down mode with an active interface, and 8.8 μW in power-down mode with an inactive interface. Available in 8-lead SOT-23 packages, they are specified from –40°C to +125°C and priced at $3.18/$2.25/$1.55 in 1000s. Single-phase Energy-Measurement ICs integrate MCU, RTC, and LCD driver The ADE7166 and ADE7169 single-phase energy-measurement ICs integrate all the circuitry required to make an electronic energy meter with LCD display, including an analog front-end with two fully differential programmable-gain voltage inputs, fixed-function DSP, enhanced 8052-compatible MCU, real-time clock, LCD driver, and peripherals. Accurate to 0.1% over a 1000-to-1 dynamic range, they surpass the requirements of the IEC 62053-2x standards. They measure active and apparent energy, as well as rms voltage and current. The ADE7169 also measures reactive energy, with less than 0.5% error over a 1000-to-1 dynamic range. The data, provided in energy-measurement units, is ready for energy billing and other uses. In antitamper mode, the reactive power accumulated depends on the sign of the active power. Operating with a single 3.3-V supply, the ADE7166/69 consume 4 mA in normal mode, 3.2 mA in battery mode, and 1.5 μA in sleep mode. Available in 64-lead LQFP packages, they are specified from –40°C to +85°C and priced from $2.62/$3.18 in 1000s. Analog-to-Digital Converter Home Page Search for more information on Analog-to-Digital Converters January 2009
December 2008
November 2008 24-bit, 192-kHz Codec includes PLL, four ADCs, and eight DACs The AD1937 high-performance, single-chip codec provides four differential-input ADCs and eight differential-output DACs. The ADCs specify 105-dB dynamic range (DR) and –96-dB total-harmonic-distortion-plus-noise (THD+N); and the DACs specify 112-dB DR and –94-dB THD+N. The converters support 24-bit data at sampling rates from 8 kHz to 192 kHz. Low electromagnetic interference (EMI) is fostered by: the on-chip PLL, which eliminates the need for a separate high-speed master clock; the sigma-delta converters, which operate in continuous-time mode; and the low-voltage operation, which also minimizes power consumption. Volume, clickless muting, and other parameters are controlled via the I2C-compatible serial port. Operating on a single 3-V to 3.6-V supply, the AD1937 dissipates 429 mW with a 48-kHz sampling rate, and 83 mW in power-down mode. Available in a 64-lead LQFP package, it is specified from –40°C to +125°C and priced at $7.63 in 1000s. October 2008 6-channel HD/SD Video Filter
The
ADA4420-6 video reconstruction filter comprises six independent
sixth-order Butterworth filters—three for standard-definition (SD) Y/C or
CVBS composite video signals, and three for high-definition (HD) YPrPb or
RGB component video signals. Each buffered input includes a transparent sync
tip clamp, allowing ac coupling without requiring dc restoration circuitry.
Each output driver can drive two 10-bit multiformat SDTV Video Decoder/RGB Graphics Digitizer The ADV7181C 10-bit SDTV graphics processor integrates a multiformat video decoder and an RGB graphics digitizer. The 10-bit, 110-MHz analog interface supports resolutions up to 1080i. It decodes a standard-definition composite- or S-video signal into an ITU-R BT.656 digital format—or an RGB/YPrPb component video signal into an RGB/YCrCb pixel output stream. It can also digitize an RGB graphics signal at VGA to SXGA rates, converting it into an RGB/YCrCb pixel output stream. Operating on 1.8-V and 3.3-V supplies, the ADV7181C consumes 325 mW in normal mode. Available in 64-lead LQFP and LFCSP packages, it is specified from –40°C to +85°C and priced at $6.95 in 1000s. September 2008 3-W high-efficiency, filterless monophonic Class-D Audio Amplifier with sync The SSM2319 monophonic Class-D audio amplifier can deliver 3.1 W of continuous output power into a 3-ohm load—or 1.4 W into an 8-ohm load—with 93% efficiency, 98-dB signal-to-noise ratio (SNR), and less than 1% distortion. It can directly drive speakers in mobile phones, MP3 players, and other battery-powered portable devices, while minimizing clicks and pops, turn-on glitches, and EMI emissions—and providing thermal shutdown and short-circuit protection. The fully differential input signal path has a 12-dB nominal gain, which can be reduced by adding two external resistors. A sync function minimizes clock intermodulation distortion when multiple amplifiers are in close proximity. Operating on a single 2.5-V to 5.5-V supply, the SSM2319 consumes 3.6 mA in normal mode and 20 nA in shutdown mode. Available in a 9-ball WLCSP package, it is specified from –40°C to +85°C and priced at $0.90 in 1000s. Low-power Audio Codec The SSM2604 low-power audio codec comprises two 24-bit analog-to-digital conversion channels and two 24-bit digital-to-analog conversion channels. Designed for MP3 players, mobile phones, and other portable devices, it accepts stereo line-level inputs and provides stereo line-level outputs. Supporting audio sampling rates from 8 kHz to 96 kHz, its DACs provide 100-dB-SNR and –80-dB THD; and its ADCs provide 90-dB SNR and –80-dB THD. Featuring an I2C interface, it can operate as either master or slave. Operating with 1.8-V to 3.6-V analog and digital supplies, the SSM2604 consumes 7 mW in stereo record/playback modes, and 56 μW in power-down mode. Available in a 20-lead LFCSP package, it is specified from –40°C to +85°C and priced at $2.07 in 1000s. HDMI/DVI Buffer with equalization
The
AD8195 HDMI/DVI buffer can implement a complete
HDMI 1.3-compliant interface on a single chip. It routes an HDMI
(high-definition-multimedia-interface) or DVI (digital-visual-interface)
input link—comprising four TMDS
(transition-minimized-differential-signaling) channels—to an output link.
Input equalization and output pre-emphasis make possible the use of long
(>20-m) cables. Supporting data rates up to 2.25 Gbps and pixel clocks up to
225 MHz, it enables DVI resolutions up to UXGA (1600 × 1200) and HDMI
formats up to 1080p deep color. It also buffers a June 2008 2:1 HDMI/DVI Switch with equalization and DDC/CEC buffers The AD8192 buffered HDMI/DVI switch selects one of two HDMI (high-definition-multimedia-interface) or DVI (digital-visual-interface) input links—each comprising four TMDS (transition-minimized-differential-signaling) channels—and routes it to a common output link. Input equalization and output pre-emphasis make possible the use of long (>20-m) cables. Supporting data rates up to 2.25 Gbps and pixel clocks up to 225 MHz, it enables DVI resolutions up to UXGA (1600 × 1200) and HDMI formats up to 1080p deep color. It also selects one of two bidirectional auxiliary links—for the DDC (display-data-channel) bus and CEC (consumer electronics control) line—thus implementing a complete HDMI 1.3-compliant interface on a single chip. The auxiliary buffers are powered independently of the TDMS link, maintaining DDC/CCE functionality when the TMDS link is powered off. Operating with 3.3-V and 5-V supplies, the AD8192 consumes 881 mW with outputs enabled and maximum pre-emphasis, 545 mW with outputs enabled and no pre-emphasis, and 215 mW with outputs disabled. Available in a 56-lead LFCSP package, it is specified from –40°C to +85°C and priced at $2.32 in 1000s. Low-power HDMI/DVI Transmitter with consumer electronic control
The
ADV7520 low-power 80-MHz HDMI/DVI transmitter
supports HDTV formats up to 720p/1080i and graphic resolutions up to XGA
(1024 × 768 @ 75 Hz), making it ideal for digital cameras, personal media
players, and other portable applications. Compatible with HDMI v1.3, DVI
v1.0, and HDCP v1.3 protocols, the transmitter supports S/PDIF for stereo-
or compressed audio and I2S for 3-W high-efficiency, filterless monophonic Class-D Audio Amplifier with ALC The SSM2317 monophonic Class-D audio amplifier can deliver 3.11 W of continuous output power into a 3-ohm load—or 1.42 W into an 8-ohm load—with 93% efficiency, 93-dB signal-to-noise ratio (SNR), and less than 1% distortion, allowing it to directly drive speakers in mobile phones, MP3 players, and other battery-powered portable devices. Its design minimizes clicks and pops, turn-on glitches, and EMI emissions—and provides thermal shutdown and short-circuit protection. The fully differential input signal path has an 18-dB nominal gain, which can be reduced by adding two external resistors. Listeners can activate automatic level control (ALC) to suppress clipping and improve dynamic range. Operating on a single 2.5-V to 5.0-V supply, the SSM2317 consumes 3.2 mA in normal mode and 20 nA in shutdown mode. Available in a 9-lead WLCSP package, it is specified from –40°C to +85°C and priced at $0.90 in 1000s. May 2008 SoundMAX Audio Codec supports high-definition audio The AD1883 high-definition SoundMAX® audio codec includes two 24-bit, 192-kHz stereo sigma-delta A/D converters; two 24-bit, 192-kHz stereo sigma-delta D/A converters; two stereo digital microphone inputs; and a 32-bit computation engine. Its 90-dB dynamic range on the audio outputs and 85-dB on the audio inputs exceed Windows Vista Premium performance specifications for notebook computers and Vista Basic performance specifications for desktop computers. It supports 1.5-V and 3.3-V HD-Audio link signaling and incorporates security features that prevent unauthorized recording. Two stereo headphone outputs are available for gaming and VoIP. The S/PDIF port supports sampling rates from 44.1 kHz to 192 kHz in PCM and AC3 formats. Operating with 3.3-V analog and digital supplies, the AD1883 consumes 282 mW. Available in a 48-lead LFCSP package, it is specified from 0°C to +70°C and priced at $2.42 in 1000s. SoundMAX Audio Codec supports high-definition audio The AD1884A high-definition SoundMAX® audio codec includes two 24-bit, 192-kHz stereo sigma-delta A/D converters; two 24-bit, 192-kHz stereo sigma-delta D/A converters; and a 32-bit computation engine Its 90-dB dynamic range on the audio outputs and 85-dB on the audio inputs, exceed Windows Vista Premium performance specifications for notebook computers and Vista Basic performance specifications for desktop computers. Two stereo headphone outputs are useful for gaming and VoIP. The S/PDIF port supports sampling rates from 44.1 kHz to 192 kHz in PCM and AC3 formats. An improved version of the AD1884, the AD1884A supports 1.5-V and 3.3-V HD-Audio link signaling. Operating with 1.8-V and 3.3-V supplies, the AD1884A consumes 282 mW. Available in a 48-lead LFCSP package, it is specified from 0°C to 70°C and priced at $2.42 in 1000s. SoundMAX Audio Codec supports high-definition audio The AD1984A high-definition SoundMAX® audio codec includes two 24-bit, 192-kHz stereo sigma-delta A/D converters; two 24-bit, 192-kHz stereo sigma-delta D/A converters; two stereo digital microphone inputs; and a 32-bit computation engine. Its 96-dB of dynamic range on the audio outputs and 90-dB on the audio inputs exceed Windows Vista Premium performance specifications for desktop- and notebook computers. Two stereo headphone outputs are available for gaming and VoIP. The S/PDIF port supports sampling rates from 44.1 kHz to 192 kHz in PCM and AC3 formats. An improved version of the AD1984, the AD1984A supports 1.5-V and 3.3-V HD-Audio link signaling, and incorporates security features that prevent unauthorized recording. Operating with 3.3-V analog and digital supplies, the AD1984A consumes 282 mW. Available in a 48-lead LFCSP package, it is specified from 0°C to +70°C and priced at $2.76 in 1000s. Audio processor for Advanced TV
The
ADAV4601 high-performance audio processor
integrates analog and digital inputs and outputs with an embedded audio
processor, making it ideal for advanced TV and related AV applications. The
analog I/O includes one 24-bit sigma-delta stereo ADC with 95-dB dynamic
range; three 24-bit sigma-delta stereo DACs with 94-dB dynamic range; four
main speaker outputs, which use pulse-width modulation to drive a Class D
amplifier; and a dedicated stereo headphone amplifier, which can drive
32-ohm loads at 2-W high-efficiency, filterless monophonic Class-D Audio Amplifier The SSM2305 monophonic Class-D audio amplifier can deliver 2.22 W of continuous output power into a 4-ohm load—or 1.34 W into an 8-ohm load—with 89% efficiency, 98-dB signal-to-noise ratio (SNR), and less than 1% distortion, allowing it to directly drive speakers in mobile phones, MP3 players, and other battery-powered portable devices. Its design minimizes clicks and pops, turn-on glitches, and EMI emissions—and provides thermal shutdown and short-circuit protection. The 18-dB nominal gain of the fully differential input signal path can be reduced by adding two external resistors. Operating on a single 2.5-V to 5.0-V supply, the SSM2305 consumes 3.2 mA in normal mode and 20 nA in shutdown mode. Available in 8-lead LFCSP and MSOP packages, it is specified from –40°C to +85°C and priced from $0.41 in 1000s. 3-W high-efficiency, filterless monophonic Class-D Audio Amplifier The SSM2315 monophonic Class-D audio amplifier can deliver 3.43 W of continuous output power into a 3-ohm load—or 1.48 W into an 8-ohm load—with 93% efficiency, 103-dB signal-to-noise ratio (SNR), and less than 1% distortion, allowing it to directly drive speakers in mobile phones, MP3 players, and other battery-powered portable devices. Its design minimizes clicks and pops, turn-on glitches, and EMI emissions—and provides thermal shutdown and short-circuit protection. The 6-dB nominal gain of the fully differential input signal path can be reduced by adding two external resistors. Operating on a single 2.5-V to 5.0-V supply, the SSM2315 consumes 3.2 mA in normal mode and 20 nA in shutdown mode. Available in a 9-lead WLCSP package, it is specified from –40°C to +85°C and priced at $0.57 in 1000s. April 2008 SoundMAX Audio Codec supports high-definition audio
The
AD1984B high-definition SoundMAX® audio codec
includes two 24-bit, 192-kHz stereo sigma-delta A/D converters; two 24-bit,
192-kHz stereo sigma-delta D/A converters; a 2-channel digital microphone
interface; and a Audio processor for Advanced TV The
ADAV4622 high-performance audio processor
integrates analog and digital inputs and outputs with an embedded audio
processor, making it ideal for advanced TV and related AV applications. The
24-bit sigma-delta audio codecs (two stereo ADCs, four stereo DACs) achieve
90-dB dynamic range. Four pulse-width-modulated outputs drive a Class D
digital amplifier. Audio data is processed at 48 kHz using 28-bit
single-precision or 56-bit double-precision modes. Two sample-rate
converters (one stereo, one |