Single Supply Analog Input Module Reference Design with 16-Bit, 8-Channel ADC for PLC
TIPD166
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Key Document

Description

This design is for a 16-bit, 8-channel analog input module for industrial programmable logic controller (PLC) systems. The circuit is realized with an 8-channel, 16-bit, successive-approximation-register (SAR), analog-to-digital converter (ADC) with an integrated precision reference and analog front-end (AFE) circuit.

Features
  • Voltage Input Range : +/- 10V, 0-10V, +/-5V, 0-5V
  • Current Input Range : +/- 20mA, 0-20mA, 4-20mA
  • 4 wire RTD Temperature Range : -40 to 160 °C
  • Single Supply operation
  • Overall Accuracy achieved: 0.1 % for voltage and current inputs & 0.25% for temperature input

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS8688  16-Bit 500kSPS 8-Channel Single-Supply SAR ADC With Bipolar Input Ranges  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
INA333  Low-Power, Zero-Drift, Precision Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
OPA320  Precision, Zero-Crossover, 20MHz, 0.9pA Ib, RRIO, CMOS Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA376  Precision, Low Noise, Low Iq Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS8688 Download
INA333 Download Download
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OPA320 Download Download
OPA376 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 2565 10 Jul 2015
Design files (3)
Title Type Size (KB) Date
ZIP 2591 05 Jun 2015
PDF 165 05 Jun 2015
PDF 671 05 Jun 2015

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