Adaptive Power Supply for PLC Analog Output Module with Output Channel Protection


Design files


TIDA-00231 is a reference design for an industrial Programmable Logic Controller (PLC) analog output module. The design provides a unique power saving solution for a digital-to-analog converter (DAC)-based analog current output module with an adaptive power supply. This adaptive power supply dynamically regulates the AVDD supply of the DAC and limits power losses to < 50mW for typical load resistance of > 300Ω. The analog output can source current up to 24mA. This reference design includes the necessary on-board protection circuit and has been tested to IEC61000-4 standard EFT, ESD, and surge requirements with IO Controller platforms. The protection circuitry does not negatively affect the design and Test results showed typical unadjusted errors were less than 0.2% FSR and calibrated accuracy is 0.05%.

Watch a TIDA-00231 overview video on the Isolated DC/DC Converter reference design NOW

  • 16 bit user configurable analog current output
  • Accuracy
    o Un-calibrated better than  ±0.2% FSR at 25 °C
    o Calibrated better than  ±0.05% FSR at 25 °C
  • Adaptive Power Supply reduces system power dissipation- power losses across FET are limited to < 50mW for typical load resistance > 300Ω
  • Reverse voltage protection for analog output
  • On-board isolated Flybuck™ power supply with inrush current protection
  • Designed to comply with IEC61000-4 Standards for ESD, EFT, and Surge
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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.

TIDU709.PDF (5626 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDRDA9.ZIP (7110 K)

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

TIDC953.ZIP (267 K)

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

TIDC954.ZIP (1201 K)

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

TIDRDA8.PDF (2139 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Analog switches & muxes

TS5A31591-Ω on-state resistance, 5-V, 2:1 (SPDT), 1-channel analog switch

Data sheet: PDF | HTML
Boost converters (integrated switch)

TPS611701.2A Switch, 38V High Voltage Boost Converter in 2x2mm QFN Package

Data sheet: PDF | HTML
Digital isolators

ISO7141CCQuad-channel, 3/1, 50-Mbps digital isolator

Data sheet: PDF | HTML
Digital isolators

ISO7420Dual-channel, 2/0, 1-Mbps digital isolator

Data sheet: PDF | HTML
General-purpose op amps

OPA2171Dual, 36-V, 3-MHz, low-power operational amplifier

Data sheet: PDF | HTML
Isolated DC/DC converters & modules

LM50177.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator

Data sheet: PDF | HTML
Precision DACs (≤10 MSPS)

DAC876016-Bit Single-Channel Programmable Current/Voltage Output DAC for 4-20mA current loop applications

Data sheet: PDF | HTML
eFuses & hot swap controllers

LM50699-V to 80-V hot swap controller with power limiting

Data sheet: PDF

Technical documentation

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Type Title Date
* Design guide Adaptive Power Supply for Programmable Logic Controller Analog Output Module Mar. 02, 2015

Related design resources

Reference designs

TIDA-00118 16-Bit Analog Output Module Reference Design for Programmable Logic Controllers (PLC)

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