16-bit 400KSPS 4-Ch. Multiplexed Data Acquisition Ref Design for High Voltage Inputs, Low Distortion

(ACTIVE) TIPD151

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Key Document

Description

This TI Verified Design implements a 16-bit, differential 4-channel multiplexed data acquisition system at 400KSPS throughput for high voltage differential input of ±20 V (40 Vpk-pk) industrial applications. The circuit is realized with a 16-bit successive-approximation-resistor (SAR) analog-to-digital converter (ADC), a precision high voltage signal conditioning front end, and a 4-channel differential multiplexer (MUX). The design details the process for optimizing the precision high voltage front end drive circuit using the OPA192 and OPA140 to achieve excellent dynamic performance with the ADS8864.

Features
  • 4-Channel, High-Voltage (±20 V), Multiplexed, Data Acquisition System
  • 400 KSPS (100KSPS/Channel) Sampling Rate
  • ±1LSB INL
  • 16 Bit, Full Scale, Channel-to-Channel Settling
  • 14.2 Bits ENOB

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TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS8864  16-Bit, 400-kSPS, Serial Interface, microPower, Miniature, Single-Ended Input, SAR ADC  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
MUX36D04  MUX36xxx 36-V, Low-Capacitance, Low-Leakage-Current, Precision, Analog Multiplexers  Switches and Multiplexers  Sample & Buy View Design Kits & Evaluation Modules
MUX36S08  MUX36xxx 36-V, Low-Capacitance, Low-Leakage-Current, Precision, Analog Multiplexers  Switches and Multiplexers  Sample & Buy View Design Kits & Evaluation Modules
OPA140  11MHz, Single Supply, Low Noise, Precision, Rail-to-Rail Output, JFET Amplifier  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA192  High-Voltage, Rail-to-Rail Input/Output, 5µV, 0.2µV/˚C, Precision Operational Amplifier  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA350  High-Speed, Single-Supply, Rail-to-Rail Operational Amplifiers MicroAmplifier™ Series  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
REF3240  4.096V 4ppm/Degrees C, 100uA SOT23-6 Series (Bandgap) Voltage Reference  Voltage Reference  Sample & Buy Not Available
REF6041  High-Precision Voltage Reference With Integrated High-Bandwidth Buffer  Voltage Reference  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 4698 29 Mar 2016 766
Design files (3)
Title Abstract Type Size (KB) Date Views
PDF 154 03 Nov 2016 199
PDF 120 03 Nov 2016 47
ZIP 476 14 Jan 2014 172
Related Tools & Software

Software (2)




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