TIDA-010048

Channel-to-channel isolated analog input module reference design

TIDA-010048

Design files

Overview

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

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUEN8.PDF (1054 K)

Reference design overview and verified performance test data

TIDRZH1.PDF (309 K)

Detailed schematic diagram for design layout and components

TIDRZH2.PDF (104 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRZH3.PDF (1348 K)

Detailed overview of design layout for component placement

TIDRZH5.ZIP (3092 K)

Files used for 3D models or 2D drawings of IC components

TIDCFE9.ZIP (1559 K)

Design file that contains information on physical board layer of design PCB

TIDRZH4.PDF (1366 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Analog switches & muxes

SN74LV4052A5-V, 4:1, 2-channel analog multiplexer

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7721Robust EMC, dual-channel, 1/1, reinforced digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
ESD & surge protection ICs

TVS330033V flat-Clamp surge protection device

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM518065-VIN no-opto flyback converter with 100-V, 1.5-A integrated MOSFET

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM5180-Q1Automotive 65-VIN no-opto flyback converter with 100-V, 1.5-A integrated MOSFET

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A49150-mA, 36-V, low-noise, high-PSRR, adjustable low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision ADCs (<=10MSPS)

ADS122U0424-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC w/ PGA, VREF, 2x IDACs & UART interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
eFuses & hot swap controllers

TPS26624.5-V to 60-V, 478mΩ, 0.025-0.88A eFuse with integrated input and output reverse polarity protection

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Channel-to-Channel Isolated Analog Input Module Reference Design Apr. 04, 2019

Related design resources

Design tools & simulation

CALCULATION TOOL
ANALOG-ENGINEER-CALC Analog engineer's calculator LM5180DESIGN-CALC LM5180 PSR flyback converter design tool

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