16-bit 400KSPS 4-Ch. Multiplexed Data Acquisition Ref Design for High Voltage Inputs, Low Distortion TIPD151 (ACTIVE)

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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, 1-Ch SAR ADC with Single-Ended Input, SPI Interface and Daisy-Chain  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 & multiplexers  Sample & Buy View Design Kits & Evaluation Modules
MUX36S08  36-V, low-capacitance, low-leakage-current, precision, analog multiplexer  Switches & 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  Single, single-supply, rail-to-rail, high speed, low noise operational amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF3240  4.096-V 4-ppm/°C, 100-µA 6-pin SOT-23 series (bandgap) voltage reference  Voltage references  Not Available Not Available
REF6041  5ppm/C High-Precision Voltage Reference with Integrated High-Bandwidth Buffer  Voltage references  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS8864 Download
MUX36D04 Download Download
Download Download
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MUX36S08 Download
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OPA140 Download Download
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OPA192 Download Download
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OPA350 Download Download
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REF3240 Download Download
REF6041 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 4698 29 Mar 2016
Design files (3)
Title Type Size (KB) Date
PDF 154 03 Nov 2016
PDF 120 03 Nov 2016
ZIP 476 14 Jan 2014
Related Tools & Software

Software (2)



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