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High-performance data acquisition signal chains used for spectroscopy, magnetic resonance imaging (MRI), and gas chromatography—and vibration, oil/gas, and seismic systems demand a state-of-the-art, high dynamic range (DR) while addressing difficult thermal design, space, and cost challenges. One way to achieve a higher dynamic range is to oversample the converter to accurately monitor and measure both small and large input signals from the sensors. Other ways include using programmable-gain amplifiers or operating multiple ADCs in parallel, using digital postprocessing to average the result. These methods may be cumbersome or impractical to implement in some systems, mainly due to power, space, and cost constraints. This 4-page Application Note focuses on the oversampling of high-throughput, 5‑MSPS, 18-bit/16-bit precision successive approximation register (SAR) converters by implementing a straightforward averaging of ADC output samples to increase the dynamic range.
This 17-page Application Note introduces the main features of the ADSP-CM408F’s analog-to-digital converter controller (ADCC), focusing on current feedback systems in high performance motor control applications. It highlights key capabilities of the analog-to-digital converter (ADC) module, guides configuration for motor control applications, and provides code samples for the ADCC drivers.
This 6-page Application Note describes a technique for autonomously detecting and capturing shock events using a low power, high-g, 3-axis digital MEMS accelerometer with minimal intervention from the host processor. The accelerometer can be programmed to monitor single or double (primary and secondary) shocks along any combination of X, Y, and/or Z axes. In addition, the entire shock profile can be captured for further analysis using an integrated 32 sample memory.
This 16-page Application Note introduces the main features of the ADSP-CM40xF’s SINC filters, focusing on high performance motor control applications. It highlights the key capabilities of the SINC filter and shows usage of the SINC filter drivers. Each SINC filter is part of a complete motor current feedback subsystem that includes a current shunt, a modulator to digitize and isolate the signal, and the SINC filter to decode the bit stream and present it to the controller.
Industrial measurement and control systems often need to interface to sensors while operating in noisy environments. Because sensors typically generate very small electrical signals, extracting their output from the noise can be challenging. Applying signal conditioning techniques such as amplification and filtering increases the system sensitivity and simplifies signal extraction. The signal can be scaled and shifted to take full advantage of high-performance ADCs. This 7-page Application Note introduces a general-purpose precision signal conditioning front-end that can close the gap between sensors and high-resolution ADCs. The circuit is analyzed to find its noise contribution, ambient noise rejection, and ability to perform highly sensitive measurements.
This 16-page application note explains the process of calibrating a 3-phase energy meter built around the ADE7978 and ADE7932/ADE7933 isolated metering chipset. A single 3.3-V supply powers the chipset. Three isolated ADCs sense phase currents using shunts and phase-to-neutral voltages using resistor dividers. A microcontroller manages the ADCs via I2C or SPI.
The ADP1046A secondary side digital power controller features analog-to-digital converters, integrated I2C communication, analog comparators, and digital compensation. Layout is crucial for complex mixed signal devices with closely spaced input and output functions, so proper care must be taken to avoid hazards. This 7-page Application Note provides guidelines to avoid noise coupling and techniques for proper grounding.
The AD5933 and AD5934 high precision impedance converter network analyzers are finite systems with some limitations. This 11-page Application Note explains the optimum measurement setup.
This 6-page Application Note describes how to connect evaluation boards to collect high accuracy digital temperature readings from the ADT7310/ADT7410 sensors using Cortex-M3® based precision analog microcontrollers, such as the ADuCM360. Example code shows how the microcontroller and temperature sensor can communicate using I2C and SPI interfaces.
This complete single-supply,16-bit buffered voltage output DAC maintains ±1 LSB integral and differential nonlinearity by utilizing a CMOS DAC followed by an innovative amplifier that has no crossover distortion. The circuit eliminates the crossover nonlinearity associated with most rail-to-rail op amps that can be as high as 4 LSBs to 5 LSBs in a 16-bit system. This industry leading solution is ideal for industrial process control and instrumentation applications that require a compact, single-supply, low-cost, highly linear 16-bit buffered voltage source. Total power dissipation for the three active devices is less than 25 mW typical when operating on a single 6-V supply.
This contactless, anisotropic magnetoresistive (AMR) linear position measurement solution features 0.002-inch accuracy over a 0.5-inch range, making it ideal for applications where accurate, high-speed, non-contact length and position measurements are critical. It provides all the signal conditioning, including instrumentation amplifiers, buffers, and a 2-channel ADC, required to efficiently process the low-level AMR sensor bridge outputs. The result is an industry leading position measurement solution suitable for valve and flow measurement, machine tool speed control, motor speed measurement, and other industrial or automotive applications.
This completely isolated 12-bit, 300-kSPS data-acquisition system uses only three active devices to process 4-mA to 20-mA input signals using a single 3.3-V supply. The total error after room temperature calibration is ±0.06% FSR over a ±10°C temperature range, making it ideal for a wide variety of industrial measurements. The small footprint makes it an industry-leading solution for 4-mA to 20-mA data acquisition systems where accuracy, speed, cost, and size play a critical role. Both data and power are isolated, making the circuit robust to high voltages and ground-loop interference often encountered in harsh industrial environments.
This low-cost, high-speed, single-supply magnetoresistive (MR) signal conditioner features a minimum PCB footprint. The complete signal conditioning solution amplifies the small output voltage of the magnetoresistive sensor and converts it into a digital output signal with less than 5 ns rise and fall times and approximately 100-ps rms jitter. An excellent alternative to Hall effect sensors, the circuit provides a compact, cost effective, robust solution for high-speed rotational sensing in industrial and automotive applications.
This completely isolated low power pH sensor signal conditioner and digitizer with automatic temperature compensation achieves 0.5% accuracy for pH between 0 and 14, with greater than 14-bits of noise-free code resolution, making it suitable for a variety of industrial applications such as chemical, food processing, water, and wastewater analysis. It supports a wide variety of pH sensors with internal resistance that can range from 1 MΩ to several GΩ. Digital signal and power isolation provides immunity to noise and transient voltages often encountered in harsh industrial environments.
This circuit provides two, 16-bit, fully isolated, universal analog input channels suitable for programmable logic controller (PLC) and distributed control system (DCS) modules. Both channels are software programmable and support a number of voltage and current ranges and thermocouple and RTD types. The inputs are protected for dc overvoltage conditions of ±30 V. The demonstration board contains two fully isolated universal input channels: in one, the voltage, current, thermocouple, and RTD inputs all share the same terminals to minimize the number of pins required; in the other, separate terminals for voltage/current inputs and thermocouple/RTD inputs provides a lower part count and component cost.
This contactless, AMR (anisotropic magnetoresistive) angle measurement solution provides 1° angular accuracy over a 180° range, making it ideal for applications that require accurate, high speed, non-contact angle measurements. The full signal chain, which includes instrumentation amplifiers, buffers, and a dual channel ADC, efficiently processes the AMR sensor’s low level bridge outputs. The result is an industry leading angle measurement solution suitable for machine tool speed control, crane angle control, motor speed measurement, and other applications.
This complete, fully isolated, analog output channel is suitable for programmable logic controllers (PLCs) and distributed control system (DCS) modules that require standard 4 mA to 20 mA HART®-compatible current outputs and unipolar or bipolar output voltage ranges. It provides a flexible building block for channel-to-channel isolated PLC/DCS output modules or any other industrial application that requires a fully isolated analog output. The circuit also includes external protection on the analog output terminals. The AD5422 16-bit digital-to-analog converter (DAC) is software configurable and provides all the necessary current and voltage outputs. The AD5700-1 HART-compliant modem, used in conjunction with the AD5422, forms a complete HART-compatible 4 mA to 20 mA solution. The AD5700-1 includes a precision internal oscillator that provides additional space savings, especially in channel-to-channel isolated applications.
This circuit provides a low cost solution to temperature monitoring because most of the circuit functionality is integrated into the ADuCM360 precision analog microcontroller, including dual 24-bit Σ-Δ ADCs, the ARM Cortex™-M3 processor core, and the PWM/DAC features for controlling the 4 mA-to-20 mA loop for loop voltages up to 28 V.
This 16-bit, ultra-stable, low-noise, precision, bipolar (±10 V) voltage source requires a minimum number of precision external components. It features ±0.5 LSB maximum integral nonlinearity (INL) and differential nonlinearity (DNL) with the AD5760 voltage-output DAC (B-grade). The complete system has less than 0.1-LSB p-p noise and drift measured over a 100-second interval. The circuit is ideal for medical instrumentation, test and measurement, and industrial control applications where precision low drift voltage sources are required.
This dual-channel colorimeter, which features a modulated light source transmitter and a synchronous detector receiver, measures the ratio of light absorbed by the sample and reference containers at three different wavelengths, providing an efficient solution for many chemical analysis and environmental monitoring instruments that measure concentrations and characterize materials through absorption spectroscopy.
This circuit offers a high linearity, low noise, wide-bandwidth vibration sensing solution that is ideal for applications, such as bearing analysis, engine monitoring, and shock detection, that require high dynamic range (±70 g to ±500 g) and flat frequency response to 22 kHz.
This complete adjustment-free linear variable differential transformer (LVDT) signal conditioning circuit can accurately measure linear displacement (position). The LVDT is a highly reliable sensor because the magnetic core can move without friction and does not touch the inside of the tube. Therefore, LVDTs are suitable for flight control feedback systems, position feedback in servomechanisms, automated measurement in machine tools, and many other industrial and scientific electromechanical applications where long term reliability is important. This circuit uses the AD698 LVDT signal conditioner, which contains a sine wave oscillator and a power amplifier to generate the excitation signals that drive the primary side of the LVDT. The AD698 also converts the secondary output into a dc voltage. The AD8615 rail-to-rail amplifier buffers the output of the AD698 and drives a low power 12-bit successive approximation analog-to-digital converter (ADC). The system has 82-dB dynamic range and 250-Hz system bandwidth, making it ideal for precision industrial position and gauging applications.
This circuit uses the ADuCM360 precision analog microcontroller in an accurate thermocouple temperature monitoring application and controls the 4-mA to 20-mA output current. The ADuCM360 integrates two 24-bit sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), two programmable current sources, a 12-bit digital-to-analog converter (DAC), and a 1.2 V internal reference, as well as an ARM Cortex-M3 core, 126 kB flash, 8 kB SRAM, and various digital peripherals, such as UART, timers, SPIs, and I2C interfaces. The ADuCM360 is connected to a type-T thermocouple and a 100-Ω platinum resistance temperature detector, which is used for cold junction compensation. The low power Cortex-M3 core converts the ADC readings to a real temperature value. The −200°C to +350°C type-T temperature range is converted to a 4-mA to 20-mA output current. The loop-powered circuit provides a complete solution for thermocouple measurements with a minimum requirement for external components.
Tactical-grade Inertial Sensor features ten degrees of freedom
The ADIS16488A complete “10-degrees-of-freedom”
inertial sensing system combines a 3-axis gyroscope—with ±450°/s
dynamic range; a 3-axis accelerometer—with ±18-g range; a
3-axis magnetometer—with ±2.5-gauss range; and a barometer—with
300‑mbar to 1100-mbar range; plus a local temperature sensor and a 12-bit
ADC. The device is fully calibrated for sensitivity, bias, axial alignment,
and linear acceleration over the –40°C to +85°C temperature range.
Functionally complete, it includes programmable self-test, power management,
and alarms. All data and commands are communicated via an SPI-compatible
serial interface. Operating on a single 3.0-V to 3.6-V supply, the
ADIS16488A consumes 245 mA in normal mode, 12.2 mA in sleep
mode, and 45 µA in power-down mode. Available in a 47-mm ×
High-precision Op Amp features low offset, wide bandwidth, and low noise
ADA4077-1 operational amplifier features
25-/50-µV max offset and 0.25-/0.55-µV/°C max drift (B-/A-grades); 1-nA max
input bias current, 3.9-MHz bandwidth, 1.2-V/µs slew rate, 7‑nV/√Hz noise;
and outputs that are stable with capacitive loads to beyond 1000 pF with no
external compensation. This combination of specifications makes the
amplifier ideal for sensor signal conditioning, process control front ends,
portable instrumentation, and precision filters. Operating on a ±2.5-V to
±18‑V supply, the ADA4077-1 draws 400 μA. Specified from
Ultralow-power, 2-/4-/8-channel, 12-bit, 1-MSPS successive-approximation ADCs
The AD7091R-2, AD7091R-4, and AD7091R-8 ultralow-power multichannel successive-approximation analog-to-digital converters achieve 12-bit accuracy at 1-MSPS sampling rates while consuming only 1.4 mW. Available with two, four, or eight analog input channels, the devices include a wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 1.5 MHz, a conversion clock, an accurate 2.5-V reference, a high-speed SPI-compatible serial interface, and a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially. MUXOUT and ADCIN pins allow signal conditioning of the multiplexer output prior to acquisition by the ADC. Specified with a 2.7-V to 5.25-V supply, the devices are compatible with 1.8-V to 5.5-V logic. Operating on a single 3‑V supply, they consume 1.4 mW at 1 MSPS, 70 µW in static mode, and 1.4 µW in power-down mode. Available in 16-/20-/24-leadTSSOP packages, the AD7091R-2/-4/-8 are specified from –40°C to +125°C and priced at $2.47/$2.67/$3.36 in 1000s.
6-channel, 16-bit, 250-ksps, simultaneous-sampling Successive-Approximation ADCs
The AD7656A and AD7656A-1 six-channel, 16-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. Three convert-start inputs allow independent simultaneous sampling of three ADC pairs. The device accepts true bipolar inputs with selectable full-scale ranges of ±5 V or ±10 V, and provides both serial and parallel outputs. The successive-approximation architecture ensures that there will be no pipeline delays. Specifications include 85.5-dB signal-to-noise-plus-distortion (SINAD), –92-dB total harmonic distortion (THD), ±1-LSB integral nonlinearity (INL), and no missing codes. The AD7656A-1 requires fewer decoupling capacitors than the AD7656A, offering a lower bill of materials cost. Operating on 5-V and ±15-V supplies, the devices consume 140 mW in normal mode and 100 µW in power-down mode. Available in a 64-lead LQFP packages, they are specified from –40ºC to 85ºC and priced at $12.45 in 1000s.
18-bit, 100-/500-kSPS successive-approximation ADCs
successive-approximation ADCs achieve 18-bit resolution with no missing
10-bit nanoDAC Digital-to-Analog Converters include 2-ppm/°C reference
The AD5310R and AD5311R 10-bit nanoDAC® buffered voltage-output DACs include an internal 2.5-V, 2-ppm/°C reference that is enabled by default. A gain-select pin sets the full-scale output to 2.5 V or 5 V. Guaranteed monotonic by design, the DACs exhibit less than 0.06% FSR gain error and 1.5-mV offset error. A power-on reset circuit ensures that the outputs power up to zero scale and remain at that level until a valid write takes place. The AD5310R includes an SPI-compatible serial interface that operates at clock rates up to 50 MHz and supports readback and daisy-chaining in systems with higher channel counts; the AD5311R includes an I2C-compatible serial interface that operates at clock rates up to 400 kHz. Operating on a 2.7-V to 5.5-V supply, the devices are compatible with 1.8-V to 5.5-V logic. They draw 350 µA when the internal reference is on and 110 µA when it is off. A per-channel power-down mode reduces the supply current to 2 µA. Specified from –40°C to +105°C, the AD5310R/11R are available in 10-lead MSOP packages and are priced at $1.29 in 1000s.
12-/14-/16-bit nanoDAC Digital-to-Analog Converters include 2-ppm/°C reference
AD5681R/AD5682R/AD5683R 12-/14-/16-bit nanoDAC®
buffered voltage-output DACs include an internal
16-bit nanoDAC Digital-to-Analog Converter
AD5683 16-bit nanoDAC® buffered
voltage-output DAC operates with an external voltage reference. A
gain-select pin sets the full-scale output to VREF or 2 × VREF.
Guaranteed monotonic by design, the DAC exhibits less than 0.06% FSR gain
error and 1.5-mV offset error. A power-on reset circuit ensures that the
output powers up to zero scale and remains at that level until a valid write
takes place. The SPI-compatible serial interface operates at clock rates up
to 50 MHz and supports readback and daisy-chaining in systems with higher
channel counts. Operating on a 2.7-V to 5.5-V supply, the DAC is compatible
with 1.8-V to 5.5-V logic, drawing 350 µA when the internal reference is
on, 110 µA when it is off, and 2 µA in power-down mode.
Specified from –40°C to +105°C, the AD5683 is available in a 2-mm ×
Isolated precision Half-Bridge Drivers provide 4-A peak output currents
The ADuM3224 and ADuM4224 isolated half-bridge gate drivers use iCoupler® technology to provide independent, isolated outputs for driving the gates of the high-side and low-side IGBT and MOSFET devices used in motor control, switching power supplies, and industrial inverters. Combining high-speed CMOS with chip-scale transformer technology, the devices provide precise timing, high reliability, and better overall performance than optocouplers or pulse transformers. Switching at up to 1 MHz, the drivers feature 59-ns max propagation delay and 5‑ns max channel-to-channel mismatch. Each output may be continuously operated up to 560 VPEAK relative to the input, thereby supporting low-side switching to negative voltages; and the differential voltage between the high side and low side may be as high as 800 VPEAK. The ADuM3224 provides 3-kV rms input-to-output isolation in a 16-lead narrow-body SOIC package; the ADuM4224 provides 5-kV rms input-to-output isolation in a 16-lead wide-body SOIC package. Their CMOS-compatible inputs provide 25-kV/μs common-mode transient immunity, and their outputs can drive 4-A peak currents at voltages from 4.5 V to 18 V. The ADuM3224/4224 operate with a 3.0‑V to 5.5-V input supply, providing compatibility with low-voltage systems. Specified from –40°C to +125°C, they are priced at $2.15/$2.59 in 1000s.
Precision Analog Front End and Controller for testing and monitoring battery cells
AD8450 precision analog front end for testing and
monitoring battery cells includes a precision programmable gain
instrumentation amplifier (PGIA) that measures the battery’s
charge/discharge current and a programmable gain difference amplifier (PGDA)
that measures the battery’s voltage. Internal laser trimmed resistor
networks set the PGIA gain to 26×, 66×, 133×, or 200× and PGDA gain to 0.2×,
0.27×,0.4×, or 0.8×, optimizing performance over the rated temperature
range. The device simplifies designs by providing high accuracy, low drift
over temperature, flexibility, and high reliability in a space-saving
package. Voltages at ISET and VSET inputs set the constant voltage and
constant current values. Switching between these modes is automatic and
transparent to the system. The MODE input selects between charge and
discharge modes; and the VCTRL output interfaces directly with PWM
controllers, such as the ADP1972 and ADP1974. Current sharing balances
charge among multiple batteries. Protection features include overvoltage and
overcurrent detection. Operating on ±15-V and +5‑V supplies, the AD8450
dissipates 200 mW. Available in an
Digital Controller for isolated power supply with PMBus interface
ADP1050 advanced digital controller with PMBus™
interface facilitates high-density, high-efficiency dc-to-dc power
conversion. The ADP1050 has four programmable pulse-width modulation (PWM)
outputs and is capable of controlling most high efficiency power topologies
with synchronous rectification. Voltage-mode control with high-speed, input
line feed-forward provides enhanced input transient response. Adaptive
dead-time compensation improves efficiency and programmable light-load
operation reduces power losses. The flexible state machine is programmed
using an intuitive GUI, reducing design time. Operating on a 3.0-V to 3.6-V
supply, the ADP1050 draws 28.5 mA in normal mode and 50 µA in
shutdown mode. Available in a
PWM Controller for battery test applications operates in buck or boost modes
The ADP1972 constant-frequency, voltage-mode, pulse-width modulation (PWM) controller for asynchronous buck- or boost-mode dc-to-dc converters is designed for use in high efficiency battery testing applications partnering with the AD8450. The ADP1972 operates as a buck converter in battery charge mode and a boost converter in recycle mode to return energy to the input bus. The high-voltage supply pin can withstand 60 V max, reducing the need for additional system supply voltages. The flexible device features precision enable, selectable buck or boost mode, internal and external synchronization with programmable phase shift, programmable duty cycle, and programmable peak hiccup current limit. Protection features include soft start to limit inrush current during startup, undervoltage lockout, and thermal shutdown. The COMP pin provides external control of the PWM operation and the FAULT pin can be signaled to disable the DH and DL outputs in case of an external fault condition. Operating on a 6.0-V to 60-V supply, the ADP1972 draws 1.5 mA in normal mode and 15 µA in shutdown mode. Available in a 16-lead TSSOP package, it is specified from –40°C to +125°C and priced at $3.50 in 1000s.
Integrated Power Solutions include four buck regulators, voltage monitor, watchdog, and reset
ADP5053 integrated power solutions
combine four high-performance buck regulators and a supervisory circuit with
voltage monitor, watchdog, and manual reset in a single small package that
meets demanding performance and board space requirements. The devices enable
direct connection to input voltages up to 15 V. Two channels integrate
high-side power MOSFETs and low-side MOSFET drivers. External NFETs can be
used in low-side power devices to achieve an efficiency optimized solution
and deliver a programmable output current of 1.2 A, 2.5 A, or 4 A. These
channels can be connected in a parallel configuration to provide a single
output with up to 8 A of current. The other two channels integrate both
high-side and low-side MOSFETs to deliver output current of 1.2 A. The
switching frequency can be programmed externally or synchronized to an
external clock. A precision enable input on each channel simplifies power-up
sequencing or adjustable UVLO thresholds. Supervisory circuits include a
voltage monitor, watchdog timer, and manual reset function. The ADP5051
adds an optional I2C interface that provides flexible
configuration options, including adjustable and fixed output voltages,
junction temperature overheat warning, low input voltage detection, and
dynamic voltage scaling. Operating on a single 4.5‑V to
Dual 16-bit, 1-MSPS Successive-Approximation ADC accepts differential inputs
The AD7903 dual 16-bit, PulSAR® analog-to-digital converter includes two low-power, high-speed, sampling ADCs and a versatile serial interface. Sampling at up to 1 MSPS, it achieves ±0.5-LSB integral nonlinearity (INL), ±0.4-LSB differential nonlinearity (DNL), 93.5-dB signal-to-noise-and-distortion (SINAD), –112-dB total-harmonic distortion (THD), and no missing codes. It accepts differential inputs in the ±VREF range, where the externally applied VREF can vary between 2.4 V and 5.1 V. The SPI-compatible serial interface allows daisy chaining of multiple ADCs and provides an optional busy indicator. Operating on a single 2.5-V supply, the device dissipates 12 mW at 1 MSPS, 40 µW at 10 kSPS, and 1 nW in standby mode. A separate I/O supply provides compatibility with 1.8-V to 5.5‑V logic. Available in a 20‑lead QSOP package, the AD7903 is specified from –40°C to +125°C and priced at $15.00 in 1000s.
Two-channel hot-swappable I2C Isolator with isolated dc-to-dc converter
ADM3260 hot swappable digital and power isolator
includes two nonlatching, bidirectional communication channels that provide
a complete isolated I2C interface, and an isolated dc-to-dc
converter that provides up to 150 mW of isolated power. Based on
isoPower® chip scale transformer
technologies, it provides functional, performance, size, and power
consumption advantages as compared to optocouplers. The bidirectional I2C
channels eliminate the need for splitting I2C signals into
separate transmit and receive signals for use with standalone optocouplers.
The isolated dc-to-dc converter provides a 3.15-V to 5.25-V regulated,
isolated voltage with up to 150 mW output power. Integrating the isolation
with semiconductor circuitry enables a complete isolated I2C
interface and power converter to be implemented in a small form factor. The
ADM3260 operates with a
Two-channel Digital Isolators provide 2.5-kV reinforced isolation
digital isolators provide superior performance, lower cost, and lower power
consumption than optocouplers. Their patented iCoupler®
technology combines high-speed CMOS with chip-scale transformers. Providing
2.5-kV reinforced isolation, they meet the safety- and regulatory
requirements of UL, CSA, and VDE. Featuring 8‑ns pulse-width distortion,
10-ns channel-to-channel mismatch, and 25‑kV/μs common-mode transient
immunity, they operate at data rates from dc to 2 Mbps. The power supplies
on each side can range from 2.25 V to 3.6 V, allowing level-translation
across the isolation barrier. Refresh circuitry, which ensures correct
output data in the absence of input transitions, can be disabled to minimize
power consumption. When refresh and watchdog functions are enabled, the
ADuM1240/41 default to logic high; and the ADuM1245/46 default to logic low.
The ADuM1240/45 have two channels that communicate in the same direction;
the ADuM1241/46 have one channel that communicates in one direction and one
that communicates in the reverse direction. Available in
Quad, 30-V, low-noise, low-power, Operational Amplifier provides rail-to-rail inputs/outputs
ADA4084-4 quad operational amplifier features
rail-to-rail inputs and outputs. It specifies 100-µV max offset at room
Bidirectional zero-drift Current Sense Amplifiers
AD8417/AD8418A high-voltage current-sense
amplifiers measure bidirectional currents across a shunt resistor in a
variety of applications, including motor control, battery management, and
solenoid control. With buffered outputs that directly interface with most
ADCs, they feature 100-dB common-mode rejection from −2 V to +70 V, a gain
of 60/20 V/V, and ±0.3/0.2% max gain error over temperature. Their
zero-drift core achieves ±200 μV offset with 0.1-μV/°C offset drift over
temperature and common-mode range. Fully qualified for automotive
applications, the amplifiers include EMI filters and patented circuitry that
ensures output accuracy with pulse-width modulated common-mode voltages.
Operating with a 2.7-V to 5.5-V supply, the AD8417/18A draw 4.1 mA.
Specified from –40°C to +125°C, they are available in
Li Ke and Colm Slattery, Electromagnetic Flow Meters Achieve High Accuracy in Industrial Applications, Analog Dialogue, 2014-02-03
Luis Orozco, Optimizing precision photodiode sensor circuit design, EE Times Europe, 2014-01-26
Mark Cantrell, Making Isolation Safety Standards Work for You, Power Systems Design, 2014-01-10
Gustavo Castro and Scott Hunt, How to Stay Out of Deep Water when Designing with Bridge Sensors, Analog Dialogue, 2014-01-06
Maurice O'Brien, Integrated Power Management Unit Simplifies FPGA-Based System, Electronics Maker, 2013-12-28
Rob Reeder, Gas Detectors to the Rescue, EDN, 2013-12-01
Eric Gaalaas, Digital Isolators Offer Easy-to-Use Isolated USB Option, EDN Network, 2013-11-09
Maurice O'Brien, Highest Power Density, Multi-Rail Power Solution For Space-Constrained Applications, Analog Dialogue, 2013-11-01
Henry He, Minimizing Errors in Multiplexed 3-Wire RTD Data-Acquisition Systems, Analog Dialogue, 2013-09-04
Baoxing Chen, Integrated signal and power isolation provides robust and compact measurement and control, EDN, 2013-07-10
Jonathan Pearson, Compensating Current Feedback Amplifiers in Photocurrent Applications, Analog Dialogue, 2013-07-02
Maithil Pachchigar, Sensor-To-Bits: Simplifying DAQ Design, Electronic Specifier, 2013-05-20
Maurice O'Brien, Integrated power management enables smaller machine vision systems, Power Systems Design, 2013-05-17
James Scanlon, Koenraad Rutgers, Safeguard Your RS-485 Communication Networks from Harmful EMC Event, Analog Dialogue, 2013-05-01
Luis Orozco, Programmable-Gain Transimpedance Amplifiers Maximize Dynamic Range in Spectroscopy Systems, Analog Dialogue, 2013-05-01
Gaetano (Guy) Fichera and Yu-Hin Wong, Digital Isolators Offer Clear Advantages for AC Voltage Motor Drive Designs, Elektronik, 2013-04-13
Maithil Pachchigar, Complete Sensor-to-Bits Solution Simplifies Industrial Data-Acquisition System Design, Analog Dialogue, 2013-04-01
Chau Tran, Marco Ablao, and Sherwin Gatchalian, Differential input to differential output amplifiers equal high temp solution, EE Times, 2013-02-06
An Overview of Spectroscopy Instrumentation Techniques, Applications and Signal Chains - Spectroscopy techniques form the basis for almost all light-based measurements in laboratory and analytical instrumentation. This webcast will start with the basics, show the theory of operation, and describe some typical spectroscopy signal chains. Next, we'll explain the challenges of the primary photodiode path and finish with a discussion of the auxiliary measurements that need to be considered in the component selection and end system design.
Model-Based Design For Motor Control Development - This webcast gives an introduction to model-based design (MBD) and discusses how this design approach can speed up time-to-market and increase product quality. Topics covered will include SW tools, workflow, advanced testing and deployment of code to embedded targets; followed by a working example of how MBD can be used for motor control algorithm design, verification, and implementation.
Addressing System Integration Challenges with Isolated Industrial Interfaces - Interfaces in industrial and instrumentation applications require isolation due to their harsh operating environments. The necessary isolation can be achieved with a digital isolator or an optocoupler. Integration of that isolation into the signal chain poses several challenges at the system level, including set-up, debug, and software related pitfalls.
Galvanic Isolation for Power Supply Applications -- This seminar discusses isolation and isolation technologies in terms of signal transmission methods and isolation materials, including optocouplers and digital isolators. Ii covers isolation usage, including current sensing, gate driver, and communication functions in ac-to-dc, motor control, hybrid electrical vehicles, PV, and other power supply applications.
Solving Isolation Challenges on Your Design -- This webinar reviews designs that require isolation to protect personnel and equipment from harsh electrical and mechanical environments. It discusses interface power requirements and approaches for achieving design objectives, and addresses performance tradeoffs and applicable safety certifications for interface components.
Industrial Process Control: Communication Solutions - This webcast provides an overview of industrial communications and trends, focusing on the most common connection between the process controller and the field instrument/actuator, the 4-mA to 20-mA loop, and on HART communication. A few solutions for the process controller and the field instrument sides of the communication will be discussed.
Got my data over the isolation barrier! Now how do I get power to run it? - “What do you mean I have to isolate this thing?” If you have ever thought your design was done, only to find out you need to isolate data in addition to getting power to the isolated circuits, then this webcast is for you. In this session, we will discuss the pros and cons of the various methods of accomplishing this task while saving important board space, design time, and cost.
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