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Application Notes

AN-1313: Configuring the AD5422 to Combine Output Current and Output Voltage to a Single Output Pin

Configurable output ranges reduce the need for multiple product variants to support various range options. This circuit uses the AD5422 16-bit, serial input, unipolar/bipolar voltage and current output DAC to provide voltage output ranges of 0 V to 5 V, 0 V to 10 V, −5 V to +5 V, or −10 V to +10 V with a 10% overrange capability; a current output, accessed from a separate pin, can provide 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA ranges. The current and voltage output pins can be connected together by adding a buffer amplifier or switch to prevent a current leakage path through an internal resistor when the device is in current output mode.

AN-1312: Applying the ADE7912/ADE7913 to 4 mA to 20 mA DC Measurements

This Application Note describes how to apply the ADE7912/ADE7913 isolated sigma-delta ADCs to measure analog 4-mA to 20-mA current loops. Current loops implement a robust sensor standard, so many industrial process control applications still employ them for analog signaling. The signaling current flows through all components, with the same current flowing even if the terminations are less than perfect, and all loop components drop voltage due to the current flowing through them. The signaling current is not affected by these voltage drops as long as the supply voltage is greater than the sum of the drops around the loop at the maximum current.

AN-1306: ADP1050 and ADP1051 EEPROM Programming and Calibration in the Power Supply Manufacturing Environment

This 11-page Application Note specifies the EEPROM programming and calibration for the ADP1050 and ADP1051 digital controllers for isolated power supplies during power supply manufacturing. First, the hex file used for EEPROM programming is generated by the GUI software in the power supply development stage. Second, using the generated hex file, the EEPROM can be programmed. Finally, the calibration procedure is presented.

AN-1304: ADE7912/ADE7913 DC Measurement Performance

The ADE7912 and ADE7913 isolated 3-channel, Σ-Δ ADCs target polyphase energy metering applications using shunt current sensors. The devices can be used to sense dc signals, however, so this 5-page Application Note presents their dc measurement performance. In energy metering applications, the current channel is used to sense the voltage across shunt current sensors and the voltage channels are used to measure voltages across resistor dividers. From a dc measurement perspective, this separation is not meaningful because every channel can be used to sense dc signals. This application note describes the performance when dc signals are applied at the inputs of the three Σ-Δ ADCs.

AN-1289: Using the AD5755 and Similar Dynamic Power Control DACs in Applications Without Dynamic Power Control

This 7-page Application Note describes using the AD5755 and other similar industrial DACs in applications that do not require the dynamic power control (DPC) feature. DPC operates by sensing the load on the current output pin and supplying only the power that is required. To achieve this, the DAC controls a dc-to-dc converter to step up a 5-V supply to between 7.4 V and 29.5 V. DPC is particularly useful in systems with wide load ranges, including a short-circuit to ground, where all power generated by the supply is dissipated on chip. In non-DPC systems, this results in higher IC and system temperatures. Low-power applications may not require dynamic power control. In these cases, the dc-to-dc converter can be excluded from the design, reducing the number of external components. This is useful for space-constrained applications that require four channels. Instead of using the dc-to-dc converter, an external PMOS can limit on-chip power dissipation, or the DAC can be powered directly, with all power dissipated on chip.

AN-1279: How to Oversample 5 MSPS, 18-Bit/16-Bit Precision SAR Converters to Increase Dynamic Range

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.

AN-1272: Differences Between the ADE7854A/ADE7858A/ADE7868A/ADE7878A and ADE7854/ADE7858/ADE7868/ADE7878 Products

The ADE7854A/ADE7858A/ADE7868A/ADE7878A are enhanced versions of the ADE7854/ADE7858/ADE7868/ ADE7878 energy measurement ICs. This Application Note describes the differences between these products and is recommended for use alongside the data sheet.

AN-1269: Designing an Inverting Power Supply Using the ADP2441/ADP2442 Synchronous Step-Down DC-to-DC Regulators

Applications such as bipolar amplifiers, optical modules, CCD bias, and OLED displays usually require a negative output voltage from a positive input voltage. Designers of power management systems need versatile switching controllers and regulators that allow them to solve these power management challenges. The ADP2441/ADP2442 switching regulators provide synchronous buck functionality, ranging from a 36 V input voltage down to 0.6 V output voltage at up to 1 A with a switching frequency range from 300 kHz to 1 MHz. Although targeted for synchronous step-down applications, their versatility allows them to realize an inverting buck boost topology, which can generate a negative output voltage from a positive input voltage, without additional cost, component count, or solution size. This Application Note describes how to implement a synchronous inverting buck boost topology to generate negative output voltages from positive input power supplies.

AN-1267: Motor Control Feedback Sample Timing Using the ADSP-CM408F ADC Controller

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.

Circuits from the Lab

CN-0350: 12-bit, 1-MSPS, Single-Supply, Two-Chip Data-Acquisition System for Piezoelectric Sensors

This 12-bit, 1-MSPS data-acquisition system uses only two active devices. The system processes charge input signals from piezoelectric sensors using a single 3.3-V supply and has a total error of less than 0.25% FSR after calibration over a ±10°C temperature range, making it ideal for a wide variety of laboratory and industrial measurements. The circuit’s small footprint makes this combination an industry-leading solution for data-acquisition systems where accuracy, speed, cost, and size play a critical role.

CN0348: 16-Bit Single-Supply Buffered Voltage Output Digital-to Analog Conversion with Less Than ±1 LSB Integral and Differential Nonlinearity

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.

CN0343: Ultrasonic Distance Measurement

This self-contained distance sensor utilizes an ultrasonic transmitter and sensitive analog receiver in conjunction with a precision analog microcontroller to provide distance measurements. Unlike complicated PLL-based receivers, the sensor uses a sensitive window comparator circuit, thereby minimizing real estate and cost. The approximate range is from 50 cm to 10 m with a resolution of about 2 cm. Temperature compensation is provided by the integrated temperature sensor and ADC contained in the microcontroller. For sensing the levels of thick liquids or foamy water, the ultrasonic level sensor is a better choice than capacitance, reed, or float sensors. In very dusty or corrosive environments, the ultrasonic sensor is the sensor of choice.

CN0341: Magnetoresistive Linear Position Measurement

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.

CN0337: 12-Bit, 300 kSPS, Single-Supply, Fully Isolated RTD Temperature Measurement System with 3-Wire Compensation

This completely isolated 12-bit, 300-kSPS RTD temperature measuring system uses only three active devices to process the output of a Pt100 RTD. An innovative circuit provides lead-wire compensation using a standard 3-wire connection. The circuit operates on a single 3.3-V supply. The total error after room temperature calibration is less than ±0.24% FSR for a ±10°C change in temperature, making it ideal for a wide variety of industrial temperature measurements. Both data and power are isolated, making the circuit robust to high voltages and ground-loop interference often encountered in harsh industrial environments.

CN0336: 12-Bit, 300 kSPS, Single-Supply, Fully Isolated, Data Acquisition System for 4-20 mA Inputs

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.

CN0335: 12-Bit, 300 kSPS, Single-Supply, Fully Isolated, Data Acquisition System for ±10 V Inputs

This completely isolated 12-bit, 300-kSPS data acquisition system uses only three active devices to process ±10-V input signals using a single 3.3-V supply. The total error after room temperature calibration is less than ±0.1% FSR over a ±10°C temperature change, making it ideal for a wide variety of industrial measurements. Both data and power are isolated, thereby making the circuit robust to high voltages and ground-loop interference often encountered in harsh industrial environments.

CN0332: Magnetoresistive (MR) Rotational Speed Sensor

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.

CN0326: Isolated Low Power pH Monitor with Temperature Compensation

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.

CN0325: PLC/DCS Universal Analog Input Using Either 4 or 6 Pin Terminal Block

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.

New Product Briefs

August 2014

Polyphase Multifunction Energy Metering ICs

ade7878aThe ADE7854A/ADE7858A/ADE7868A/ADE7878A high accuracy, 3-phase electrical energy measurement ICs include 2nd-order Σ-Δ ADCs, a digital integrator, reference circuitry, and all signal processing required to perform total (fundamental and harmonic) active, reactive (ADE7858A, ADE7868A, and ADE7878A), and apparent energy measurement and rms calculations. The ADE7878A can also perform fundamental-only active and reactive energy measurement and rms calculations. A fixed-function DSP executes the signal processing from a program stored in the on-chip ROM. The devices can measure active, reactive, and apparent energy in various 3-phase configurations, such as wye or delta services, with both three and four wires. They provide rms offset correction, phase calibration, and gain calibration for each phase. Operating on a single 3.3-V supply, the ADE78xxA draw 20 mA in normal mode, 4.5 mA in PSM1 mode, 0.2 mA in PSM2 mode, and 1.7 µA in PSM3 mode. Available in 40-lead LFCSP packages, they are specified from –40°C to +85°C and priced from $4.73 in 1000s.

6-channel SPI Digital Isolator with delay clock provides 3.75-kV isolation

adum3150The ADuM3150 6-channel SPIsolator™ digital isolator is optimized for isolated serial peripheral interfaces (SPIs). Based on iCoupler® chip-scale transformer technology, the 14-ns propagation delay and 1-ns jitter in the CLK, MO/SI, MI/SO, and SS signals supports SPI clock rates of up to 17 MHz; a delay clock output on the master side supports 40-MHz clock rates. Two low-data-rate channels, one in each direction, support a 250-kbps data rate with 2.5-μs jitter. The devices provide 3.75-kV isolation and 25-kV/μs common-mode transient immunity. The power supplies on each side can range from 3.0 V to 5.5 V, allowing level-translation across the isolation barrier. Available in a 20-lead SSOP package, the ADuM3150 is specified from –40°C to +125°C and priced at $3.10 in 1000s.

7-channel SPI Digital Isolators provide 3.75-kV isolation

adum3151The ADuM3151/ADuM3152/ADuM3153 7-channel SPIsolator™ digital isolators are optimized for isolated serial peripheral interfaces (SPIs). Based on iCoupler® chip-scale transformer technology, the 14-ns propagation delay and 1-ns jitter in the CLK, MO/SI, MI/SO, and SS signals supports SPI clock rates of up to 17 MHz. Three low-data-rate channels—in three different channel direction combinations—support a 250-kbps data rate with 2.5-μs jitter. The devices provide 3.75-kV isolation and 25-kV/μs common-mode transient immunity. The power supplies on each side can range from 3.0 V to 5.5 V, allowing level-translation across the isolation barrier. Available in 20-lead SSOP packages, the ADuM315x are specified from –40°C to +125°C and priced from $2.15 in 1000s.

July 2014

Quad JFET-input Op Amp features low noise, high precision, low bias current, rail-to-rail outputs

ada4610-4The ADA4610-4 quad precision JFET-input amplifier features 1-mV max offset, 8-µV/°C max offset drift, 5-pA bias current, 110-dB common-mode rejection, 98-dB open-loop gain, 7.3-nV/rt-Hz noise, 9.5-MHz bandwidth, 25-V/µs slew rate, and rail-to-rail outputs, making it well-suited for precise, low-level measurements in sensor front-ends, medical instruments, and automated test equipment. Fast settling is maintained with substantial capacitive loads, and the output avoids phase reversal when input voltages exceed the maximum common-mode voltage range. Operating on ±4.5-V to ±18-V supplies, the ADA4610-4 draws 1.5 mA per amplifier. Available in a 14-lead SOIC package, it is specified from –40°C to +125°C and priced at $3.65 in 1000s.

High-speed, high-voltage Op Amp provides 1-A output drive

ada4870The ADA4870 unity gain stable, high-speed, current-feedback amplifier can deliver 1-A output current and 2500-V/μs slew rate from a 40-V supply. Its innovative architecture enables high output power, high-speed signal processing in applications that use a low-impedance load, making it ideal for driving high-voltage power FETs, piezo transducers, PIN diodes, and CCD panels. Operating on ±5-V to ±20-V supplies, the ADA4870 draws 32.5 mA in normal mode and 0.75 mA in shutdown mode. Available in a 20-lead power SOIC package, it is specified from –40°C to +85°C and priced at $8.50 in 1000s.

Quad Comparator

adcmp393The ADCMP393 low-power quad comparator with rail-to-rail inputs is ideal for use in battery powered applications. It features a common-mode input voltage range that extends 200 mV beyond the rails, an offset voltage of 1 mV typical across the full common-mode range, and a logic-low output when the supply voltage is less than the UVLO threshold. Operating on a 2.3-V to 5.5-V supply, the ADCMP393 draws 26.8 µA. Available in a 14-lead SOIC package, it is specified from –40°C to +125°C and priced at $0.49 in 1000s.

 

 

 

Precision Analog Microcontroller includes 14-bit analog I/O, MIDO interface, ARM Cortex-M3

aducm320The ADuCM320 combines high-performance analog and digital peripherals, an 80-MHz ARM Cortex-M3 processor, and flash memory. The 14-bit, 1-MSPS ADC accepts up to 16 single-ended or differential inputs, and can measure the voltage at the IDAC outputs, the chip temperature, and the supply voltages; a selection of channels can be measured in sequence without software involvement. Up to eight VDACs provide output ranges of 0 to 2.5 V or 0 to AVDD, and retain their output voltages during a watchdog or software reset. Four IDACs provide output currents between 0 mA and 150 mA. A low-drift band gap reference and a voltage comparator complete the analog input peripheral set. The low-power ARM Cortex-M3 processor and 32-bit RISC machine offers up to 100 MIPS peak performance. Two 128-kB flash memory blocks support simultaneous execution and writing/erasing, making it ideal for 10G, 40G, and 100G optical applications. The device operates from the on-chip oscillator or an external crystal and PLL; this clock can be divided down to reduce current consumption. The MDIO interface can operate at up to 4 MHz. On-chip digital peripherals include 32-kB SRAM, a UART, two I2C, two SPI, GPIO, 32-element PLA, three general-purpose timers, a wake-up timer, a watchdog timer, and a 16-bit PWM with seven output channels. The processor’s large support ecosystem eases product development. The ADuCM320 operates on a single 2.9-V to 3.6-V supply. Available in a 96-ball CSP-BGA package, it is specified from –40°C to +85°C and priced at $12.80 in 1000s.

Dual 16-bit, 310-MSPS pipelined ADC provides LVDS outputs

ad9652The AD9652 dual, 16-bit analog-to-digital converter samples at up to 310 MSPS. Designed to support high-speed signal-processing applications that require high dynamic range over a wide input frequency range, its –157.6-dBFS noise floor and 85 dBFS spurious-free dynamic range (SFDR) allow low-level signals to be resolved in the presence of large signals. The dual ADC cores feature a multistage, pipelined architecture with integrated output error correction logic. The high-performance on-chip voltage reference and buffer minimize external circuitry. The ADC can support input clock frequencies of up to 1.24 GHz, with a 1×, 2×, 4×, or 8× clock divider generating the ADC sample clock. A duty cycle stabilizer compensates for variations in the ADC clock duty cycle. The two16-bit ADC outputs are interleaved onto a single LVDS output port along with a double-data-rate (DDR) clock. Programming for setup and control are accomplished via a 3-wire SPI-compatible serial interface. Operating on 1.8-V and 3.3-V supplies, the AD9652 dissipates 2.2 W in normal mode, 80 mW in standby mode, and 1 mW in power-down mode. Available in a 144-ball CSP-BGA package, it is specified from –40°C to +85°C and priced at $231.25 in 1000s.

June 2014

Quad Comparator includes accurate reference voltage

adcmp396The ADCMP396 low-power quad comparator with rail-to-rail inputs is ideal for use in battery powered applications. It features a common-mode input voltage range that extends 200 mV beyond the rails, an offset voltage of 1 mV typical across the full common-mode range, and a logic-low output when the supply voltage is less than the UVLO threshold. The 1-V buffered reference can connect directly to the comparator inputs, serving as the trip value for precision monitoring and detection of positive voltages; or as an offset when monitoring negative voltages. Operating on a 2.3-V to 5.5-V supply, the ADCMP396 draws 42 µA. Available in a 16-lead SOIC package, it is specified from –40°C to +125°C and priced at $0.98 in 1000s.

 

 

Isolated 16-bit Sigma-Delta Modulator

ad7403The AD7403 high-performance, second-order, Σ-Δ modulator converts an analog input into a high-speed, single-bit data stream, with on-chip digital isolation based on iCoupler technology. Operating from a 5-V supply, it accepts a ±250 mV (±320 mV full-scale) differential input signal, making it ideally suited to monitor shunt voltages in high-voltage applications that require galvanic isolation. The analog input is continuously sampled and converted to a bit stream at up to 20 MHz. The original signal can be reconstructed with a digital filter to achieve 88-dB signal-to-noise ratio (SNR) at 78.1 kSPS. The serial interface, which operates at 3 V or 5 V, provides 5-kV rms isolation and 25-kV/µs common-mode transient immunity. Available in a 16-lead SOIC package, the AD7403 is specified from –40°C to +125°C and priced at $3.35 in 1000s.

12-bit, 2.0-GSPS Pipelined ADC

ad9625The AD9625 sampling analog-to-digital converter achieves 12-bit performance at conversion rates of up to 2.0 GSPS. Designed for sampling wide bandwidth analog signals up through the 2nd Nyquist zone, its combination of wide input bandwidth, high sampling rate, and excellent linearity is ideally suited for spectrum analyzers, data acquisition systems, and a wide assortment of military electronics applications, such as radar and electronic countermeasures (ECM). The JESD204B-based high-speed serialized outputs are configurable in a variety of one-, two-, four-, six-, or eight-lane arrangements. Operating on a 1.3-V and 2.5-V supplies, the AD9625 dissipates 3.5 W. Available in a 196-ball BG_ED package, it is specified from –40°C to +85°C and priced at $625.00 in 1000s.

Dual 14-bit, 1-GSPS Pipelined ADC

ad9680The AD9680 dual 14-bit, 1 GSPS analog-to-digital converter includes an on-chip buffer and sample-and-hold circuit, making it small, low power, and easy to use. Designed for sampling wide bandwidth analog signals of up to 2 GHz, it is optimized for wide input bandwidth, high sampling rate, excellent linearity, and low power in a small package. The dual ADC cores use a multistage, differential pipelined architecture with integrated output error correction logic. An on-chip voltage reference eases design considerations. Each ADC output is connected to a digital down converter, which consists of a 12-bit NCO, a half-band decimating filter, an FIR filter, a gain stage, and a complex-real conversion stage. The JESD204B-based high-speed serialized outputs are configurable in a variety of one-, two-, or four-lane alternatives. Configuration is accomplished via a 3-wire SPI-compatible interface. Flexible power-down options allow significant power savings. Operating on 1.25-V, 1.8-V, 2.5-V, and 3.3-V supplies, the AD9680 dissipates 3.3 W in normal mode, 1.4 W in standby mode, and 835 mW in power-down mode. Available in a 64-lead LFCSP package, it is specified from –40°C to +85°C and priced at $584.38 in 1000s.

Dual 3-MHz, 800-mA Buck Regulators

adp5133The ADP5133 combines two high-performance buck regulators in a tiny package to meet demanding performance requirements. Their high switching frequency enables the use of tiny multilayer external components, minimizing PCB area. The buck regulators can operate in forced PWM mode, or can switch to power save mode (PSM) when the load current falls below the threshold, improving light-load efficiency. The two bucks operate out of phase to reduce the input capacitor size and noise. The regulators are activated through dedicated enable pins; and the output voltages can be externally set through a resistor feedback network. Operating on a single 2.3-V to 5.5-V supply, the ADP5133 draws 87 µA with all channels enabled and 0.3 µA with all channels disabled. Available in a 16-ball WLCSP package, it is specified from –40°C to +125°C and priced at $1.29 in 1000s.

Technical Articles

Luis Orozco, How to… Make Precision Light Measurements with Large Area Photodiodes, Anglia Live, 2014-07-28

Maurice O'Brien, Designing Robust, Isolated I2C/PMBus Data Interfaces for Industrial, Telecommunications, and Medical Applications, Analog Dialogue, 2014-07-02

Maithil Pachchigar, Demystifying High-Performance Multiplexed Data-Acquisition Systems, Analog Dialogue, 2014-07-02

Conal Watterson, Optimizing CAN node bit timing to accommodate digital isolator propagation delays, ECN, 2014-06-17

Mark Looney, An Introduction to MEMS Vibration Monitoring, Analog Dialogue, 2014-06-04

Jess Espiritu, Complex Power-Supply Sequencing Made Easy, Analog Dialogue, 2014-06-04

Ryan Schnell, Powering the Isolated Side Of A Half-bridge Configuration, Power Electronics, 2014-05-23

Irvin Ou, Simple Circuit Allows Backward Compatibility for Digital Power Controllers, Analog Dialogue, 2014-05-05

David Rice, Dynamic power control minimises power loss, maximises temperature range, EE Times Europe, 2014-04-16

David Rice, Dynamic power control minimises power loss, maximises temperature range, EDN Europe, 2014-04-16

Jim Scarlett, Capacitance-to-Digital Converter Facilitates Level Sensing in Diagnostic Systems, Analog Dialogue, 2014-04-02

John Pitrus, Smart Meter Advances Stop Electricity Theft., Electronic Design, 2014-03-14

David Carr, Surging Across the Barrier: Digital Isolators Set the Standard for Reinforced Insulation, Power Pulse, 2014-03-10

Jakub Szymczak, Shane O’Meara, Johnny S. Gealon, and Christopher Nelson De La Rama, Precision Resolver-to-Digital Converter Measures Angular Position and Velocity, Analog Dialogue, 2014-03-03

Bob Scannell, Wireless Vibration Sensors Enable Continuous And Reliable Process Monitoring, Electronic Design, 2014-02-25

Derrick Hartmann, Design tradeoffs for loop-powered transmitters, EDN, 2014-02-18

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

Webinars and Tutorials

Isolation in Ultra Low Power Applications - Advances in isolation technology have reduced the power consumption of digital isolators by orders of magnitude, enabling safety and convenience in low-power applications. This webcast looks at several designs that take advantage of quiescent currents less than 1 µA per channel, including 4-20 mA field instrumentation, telecom interfaces referenced to negative 42-V rails, and battery operated devices.

The Spectrum of Current Sensing: From DC to Light - Current measurement is an essential part of sensor interface, control, power management, and communications. The span of current sensing is from picoamperes to kiloamperes, and from dc to gigahertz (or light, when using photodiodes). We will cover high power and motor control, 4–20 mA industrial communications, energy monitoring, photodiodes, isolation, and developing precision current sources. We will also show on-line tools for circuit design.

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.

 

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