TIPD158
Low Cost Loop-Powered 4-20mA Transmitter EMC/EMI Tested Reference Design
TIPD158
Overview
This CerTIfied Reference Design is a low cost system that implements a 12-bit loop-powered, or 2-wire, transmitter using the DAC7311, OPA317, and TL431B. The design includes a protection circuit that provides immunity to the IEC61000-4 test suite. The design also includes a circuit to rectify a reverse polarity supply voltage. The protection circuit and rectifier do not negatively affect the current output performance, resulting in <0.2% total unadjusted error (TUE).
This design is well suited for industrial automation and process conrol applications requiring a low-cost solution for 2-wire data transmission.
Features
- 12-bit, loop-powered 4-20mA, transmitter
- 10-36 V Loop Supply Voltage
- <0.2% total unadjusted error (TUE)
- <0.04% calibrated error
- Low Cost Design
- Verified to pass IEC61000-4-2/3/4/6 tests
- Functional with reverse polarity supply connection
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDC383A.ZIP (2604 K)
Detailed schematic diagram for design layout and components
TIDRB04.PDF (132 K)
Detailed schematic diagram for design layout and components
TIDRB05.PDF (79 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
Products
Includes TI products in the design and potential alternatives.
Precision DACs (<=10MSPS)
DAC7311 — 12-bit, single-channel, ultra-low power DAC in 6-pin SC70 package for battery powered applications
Data sheetPrecision op amps (Vos<1mV)
OPA317 — Low Offset, Rail-to-Rail I/O Operational Amplifier
Data sheetShunt voltage references
TL431 — Adjustable precision shunt regulator
Data sheetStart development
Technical documentation
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View all 5
| Type | Title | Date | |
|---|---|---|---|
| * | User guide | Low-Cost Loop-Powered 4-mA to 20-mA Transmitter EMC/EMI Tested Design Guide | Apr. 23, 2014 |
| Technical article | How to design fully isolated 4-wire sensor transmitters | Oct. 21, 2015 | |
| Technical article | How to design power-isolated 4-wire sensor transmitters | Sep. 18, 2015 | |
| Technical article | Designing output isolated 4-wire sensor transmitters | Aug. 28, 2015 | |
| Technical article | 2-wire 4-20mA sensor transmitters: Increasing Sensor Power with Switching Power Supplies (Part 6) | Apr. 14, 2015 |
Support & training
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