Channel-to-channel isolated analog input module reference design
TIDA-010048
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Key Document

Description

This reference design is a four channel-to-channel, isolated 4–20 mA, current-loop analog input module. The design includes a short circuit, overcurrent, and overvoltage limit function for condition monitoring sensor and module applications. The major features of this analog input module include channel isolation, a multi-channel analog input module powered up by a single flyback converter using LM5180 device, a power supply to 2-wire transmitter and short-circuit protection circuit. This design can also support a four-channel analog input module.

Features
  • 1 to 4 channel-to-channel isolated analog input module
  • Supply for field transmitters with output power limitation (short limited to 25mA)
  • Transmitter supply: 25 ±1V, IOUT < 25-mA peak
  • Input protected against miswiring
  • UART interface 24b ΔΣADC to reduce BOM size and cost

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TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS122U04  24-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC w/ PGA, VREF, 2x IDACs & UART interface  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
ISO7721  High-speed, robust-EMC reinforced dual-channel digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM5180  65-VIN PSR flyback converter with 100-V, 1.5-A integrated power MOSFET  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
LM5180-Q1  Automotive 65-VIN PSR flyback converter with 100-V, 1.5-A integrated power MOSFET  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
SN74LV4052A  Dual 4-channel analog multiplexer & demultiplexer  Switches & multiplexers  Sample & Buy View Design Kits & Evaluation Modules
TPS2662  60V 800mA Industrial eFuse With Integrated Reverse Polarity Protection  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS7A49  Wide VIN, 150-mA, ultra-low-noise, high-PSRR low-dropout (LDO) linear regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TVS3300  33V Flat-Clamp Surge Protection Device  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS122U04 Download Download
Download Download
ISO7721 Download Download
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LM5180 Download Download
LM5180-Q1 Download Download
SN74LV4052A Download Download
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TPS2662 Download -
TPS7A49 Download Download
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TVS3300 Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1054 04 Apr 2019
Design files (6)
Title Type Size (KB) Date
ZIP 1559 04 Apr 2019
ZIP 3092 04 Apr 2019
PDF 1366 04 Apr 2019
PDF 1348 04 Apr 2019
PDF 104 04 Apr 2019
PDF 309 04 Apr 2019
Related Tools & Software

Development Tools (2)

Name Part Number Tool Type
Analog engineer's calculator  ANALOG-ENGINEER-CALC  Calculation Tools 
LM5180 PSR flyback converter design tool  LM5180DESIGN-CALC  Calculation Tools 

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