Precision Medium Bandwidth Solutions
Precision medium bandwidth signal chains cover a large range of applications from the smallest perturbation of the electrical grid to the loudest roar of a jet engine. These are solutions that demand accuracy across signal bandwidths from DC to 100 kHz with sampling rates up to 4 MSPS such as condition-based monitoring (CbM), power quality monitoring, sensor and system data acquisition, rotation and position sensing, and analog input modules for industrial systems.
Analog Devices’ precision medium bandwidth signal chains combine precision amplifiers, voltage references, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), circuit protection, and isolation products.
Value and Benefits
Our medium bandwidth signal chain solutions provide valuable measurement and drive control options characterized by 16-bit to 24-bit resolution combined with DC precision and AC signal fidelity. They provide the key benefits of precise measurements of small and large amplitude signals, measurement and generation of arbitrary signals, or measurement of signals from many inputs at once.
We also provide options for high channel-count synchronized systems designed with consideration for time accuracy and channel-to-channel phase alignment, and options for high channel density with small form factor multichannel converters or more highly integrated signal chain blocks (µModule® solutions).
Provide accuracy with the balance of power and speed
DC precision with AC quality
Flexible Measurements including high channel count
Precision Medium Bandwidth Signal Chains
Data Acquisition
Data Acquisition—Multichannel
The following signal chains provide highly scalable solutions for multichannel use cases with trade-offs between power, bandwidth, and noise. These chains are typified by simplified analog front-end design and precision converters with multiple analog-to-digital conversion input channels per device.
Adjust the parameters below to achieve the desired complete signal chain SNR (Signal to Noise Ratio).
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±60 V fault protection and detection, 11 Ω RON, dual SPST switch
36 V fully-differential programmable-gain instrumentation amplifier with 25 pA input bias current
Ultra-low distortion 1 nV/√Hz amp
4MSPS Dual Simultaneous Sampling, 16-BIT SAR ADC, Differential Input
2.1 nV/√Hz, 1.1 mA, 80 MHz low noise and distortion, rail-to-rail output amplifier
Ultra-low noise, high-accuracy 3.3 V voltage reference
Adjust the parameters below to achieve the desired complete signal chain SNR (Signal to Noise Ratio).
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±60 V fault protection and detection, 11 Ω RON, dual SPST switch
36 V fully-differential programmable-gain instrumentation amplifier with 25 pA input bias current
Ultra-low distortion 1 nV/√Hz amp
24-Bit, 4-channel 1.5 Msps precision alias free ADC
2.1 nV/√Hz, 1.1 mA, 80 MHz low noise and distortion, rail-to-rail output amplifier
Ultra-low noise, high-accuracy 4.096 V voltage reference
Data Acquisition—Single Channel
In this section, find signal chain options that provide highly scalable solutions for data acquisition, with trade-offs between power, bandwidth, and noise. These chains are typified by simplified analog front-end design with antialiasing protection. Single-channel signal chains can be utilized in multichannel systems where channel-to-channel isolation is required.
±60 V fault protection and detection, 11 Ω RON, dual SPST switch
36 V fully-differential programmable-gain instrumentation amplifier with 25 pA input bias current
Ultra-low distortion 1 nV/√Hz amp
DC to 204 kHz, dynamic signal analysis, precision 24-bit ADC with power scaling
Zero-drift, single-supply, rail-to-rail input/output operational amplifier
Ultra-low noise, high-accuracy 4.096 V voltage reference
150 Msps 3/3.75 kV rms isolator
±60 V fault protection and detection, 11 Ω RON, dual SPST switch
24-Bit, 1 Msps data acquisition solution µModule
Zero-drift, single-supply, rail-to-rail input/output operational amplifier
Ultra-low noise, high-accuracy 4.096 V voltage reference
150 Msps 3/3.75 kV rms isolator
±60 V fault protection and detection, 11 Ω RON, dual SPST switch
36 V fully-differential programmable-gain instrumentation amplifier with 25 pA input bias current
Ultra-low distortion 1 nV/√Hz amp
18-Bit, 2 Msps, differential SAR ADC
3.1 nV/√Hz, 1 mA, 180 MHz, rail-to-rail input/output amplifier
Ultra-low noise, high-accuracy 5.0 V voltage reference
150 Msps 3/3.75 kV rms isolator
Power Solutions
Resources
Tools
Noise Tool: Precision Waveform - Alias-Free Simultaneous Sampling
Simulation
Video
Easily Connect Sensors with ADI's Robust Industrial Signal Chains
Reference Designs
Single-Channel, Fully Isolated, Low Latency Data Acquisition System (DAQ)
High Performance, Alias Free Measurement Platform for Flexible Data Acquisition System
Technical Articles
How to Use Zero-Drift Amplifiers in Wider Bandwidth Applications
How High Performance Modular Instruments Enable Greater Applications and Smaller Form Factor
Sigma-Delta ADC Clocking—More Than Jitter
Fundamental Principles Behind the Sigma-Delta ADC Topology: Part 1
Use of Integrated Passives in Micromodule SIPs
AC and DC Data Acquisition Signal Chains Made Easy
CTSD Precision ADCs—Part 1: How to Improve Your Precision ADC Signal Chain Design Time
Vibration and Sound
This section includes vibration and sound signal chains for use cases with low noise and wide bandwidth, such as edge node sensing and high performance vibration and sound data acquisition channels. Some of the signal chains include devices with integrated digital filters to simplify analog filter design, reduce interface speed, and reduce power consumption in the digital host. Includes high performance DAQ signal chains with wide bandwidth and low noise.
Edge Node Vibration Sensing
Vibration Sensing Data Acquisition Module
±60 V fault protection and detection, 11 Ω RON, dual SPST switch
200 mA 2-terminal programmable current source
16-Bit rail-to-rail DACs with I2C interface
Precision, low noise, CMOS, RRIO op amp (single)
High speed, ±0.1 µV/˚C offset drift, fully differential ADC driver
DC to 204 kHz, dynamic signal analysis, precision 24-bit ADC with power scaling
Zero-drift, single-supply, rail-to-rail input/output operational/amplifier
Ultra-low noise, high-accuracy 4.096 V voltage reference
±60 V fault protection and detection, 11 Ω RON, dual SPST switch
200 mA 2-terminal programmable current source
Precision, low noise JFET op amp
High speed, ±0.1 µV/˚C offset drift, fully differential ADC driver
DC to 204 kHz, dynamic signal analysis, precision 24-bit ADC with power scaling
Zero-drift, single-supply, rail-to-rail input/output operational/amplifier
Ultra-low noise, high-accuracy 4.096 V voltage reference
150 Msps 3/3.75 kV rms isolation
LTspice Signal Chain Simulations
Power Solutions
Resources
Tools
AD7768-1 Filter Model
(Download xlsx)
AD7768 Filter Model
(Download xlsx)
Simulation
Videos
Easily Connect Sensors with ADI's Robust Industrial Signal Chains
CN0549 - CbM Development Platform
ADI Sensor Interface Series - CbM and Vibration Analysis
Reference Design
Application Note
Pairing A Driver Amplifier with the AD7768/AD7768-4 or the AD7768-1
Technical Articles
How to Use Zero-Drift Amplifiers in Wider Bandwidth Applications
Maximize the Performance of Your Sigma-Delta ADC Driver
Open-Source, Reusable Software Stack Enables Real-Time Processing and Algorithm Development for CbM
The Wearable for Machine Health: Condition-Based Monitoring
How High Performance Modular Instruments Enable Greater Applications and Smaller Form Factor
No Infidelity: Audio Test Platforms Benefit from New 24-Bit, Sigma-Delta ADC’s Superior SINAD
Using LTspice to Analyze Vibration Data in Condition-Based Monitoring Systems
Condition Monitoring System Design Choices and Their Impact on Signal Chain Implementation
Position—Rotation
Encoder-Based Rotation Sensing
The following signal chains deliver high precision rotation measurement capability, with options to include simultaneous sampling signal chains for phase accuracy, low latency for precision control loops, and lower resolution options for cost-sensitive applications.
Low noise, precision CMOS dual amplifier
High speed, ±0.1 µV/˚C offset drift, fully differential ADC driver
4 Msps dual simultaneous sampling, 16-bit SAR ADC, differential input
3.1 nV/√Hz, 1 mA, 180 MHz, rail-to-rail input/output amplifier
Ultra-low-noise, high-accuracy 3.3 V voltage reference
Tiny micropower, low voltage dual comparators
Low noise, precision CMOS dual amplifier
High speed, ±0.1 µV/˚C offset drift, fully differential ADC driver
4 Msps dual simultaneous sampling, 16-bit SAR ADC, differential input
Quad, 16-bit, 4 MSPS, Simultaneous Sampling, μModule Data Acquisition Solution
Tiny micropower, low voltage dual comparators
AMR-Based Rotation Sensing
In this section we describe a signal chain that delivers the highest level of performance for rotation sensing and feedback applications.
Resources
Reference Designs
Magnetoresistive Angle and Linear Position Measurements
Application Note
On-Chip Oversampling for the AD7380 Family of SAR ADCs
Technical Articles
Fast Reacting Optical Encoder Feedback System for Miniature Motor Driven Applications
Sonar
Find signal chain options that provide highly scalable solutions for passive sonar array applications. Solutions here focus on simplified analog front-end design with inherent antialiasing and easy-to-drive data converter inputs.
36 V, 18 MHz, low noise, fast settling single supply, RRO, JFET op amp
Low power, low noise and distortion, rail-to-rail output amplifier
Ultralow power, low distortion ADC driver
8-Channel, 24-bit, simultaneous sampling adc, power scaling, 110.8 kHz BW
3.1 nV/√Hz, 1 mA, 180 MHz, rail-to-rail input/output amplifier
0.25 ppm noise, low drift precision reference
36 V, 18 MHz, low noise, fast settling single supply, RRO, JFET op amp
Low power, low noise and distortion, rail-to-rail output amplifier
Precision, low power, low noise, wide BW fully differential amplifier/ADC driver
24-Bit, 4-channel, 1.5 Msps alias-free simultaneous sampling ADC
0.25 ppm noise, low drift precision reference
36 V, 18 MHz, low noise, fast settling single supply, RRO, JFET op amp
Low power, low noise and distortion, rail-to-rail output amplifier
High speed, ±0.1 µV/˚C offset drift, fully differential ADC driver
DC to 204 kHz, dynamic signal analysis, precision 24-bit ADC with power scaling
0.25 ppm noise, low drift precision reference
Resources
Application Notes
Modular Data Acquisition (DAQ) Footprint Using the AD7768/AD7768-4
Technical Article
CTSD Precision ADCs—Part 3: Inherent Alias Rejection Made Possible
Training and Support
Trainings and Tutorials
Video
Jan 29, 2019
09:05Driving SAR ADCs Part 7: Distortion caused by large Rfilt
Video
Jan 17, 2019
07:45Driving SAR ADCs Part 3: Designing the RC Filter
Video
Jan 17, 2019
08:39Driving SAR ADCs Part 4: Simulating Analog Input Model in LTspice
Video
Jan 17, 2019
06:10Driving SAR ADCs Part 1: Analog Input Model
Video
Jan 17, 2019
05:00Driving SAR ADCs Part 6: Driver Ringing and Instability
Video
Jan 17, 2019
04:57Driving SAR ADCs Part 2: Kickback Calculations
Video
Jan 17, 2019
09:13Driving SAR ADCs Part 5: Precision ADC Driver Tool
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