Highly-Accurate, Loop-Powered, 4mA to 20mA Field Transmitter With HART® Modem Reference Design
TIDA-01504
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Key Document
Description
This reference design provides a solution for a loop-powered, highly-accurate, field (sensor) transmitter with a HART® modem. The design uses a partially-discrete 4-mA to 20-mA current transmitter, HART modem, microcontroller, and power conditioning blocks in realizing a smart field transmitter design. The design is compliant with the HART FSK Physical Layer Specification and has been registered with FieldComm Group™.
Features
- Loop-powered, 4-mA to 20-mA current transmitter with DAC8740H HART modem and onboard power conditioning blocks
- Less than 0.1% FSR total unadjusted error at room temperature
- External protection circuitry with reverse polarity protection
- Compliant with HART FSK Physical Layer Specification and registered HART device
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Schematic/Block Diagram
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Design Guide
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TI Devices (8)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| DAC8740H |
HART®, FOUNDATION Fieldbus™, and PROFIBUS PA-compliant modem with UART interface |
Digital-to-analog converters (DACs) |
Sample & Buy |
View Design Kits & Evaluation Modules |
| DAC8830 |
16-bit, single-channel, ultra-low power, voltage output DAC |
Digital-to-analog converters (DACs) |
Sample & Buy |
Not Available |
| LM4132 |
0.05% 20-ppm/°C drift precision series voltage reference with shutdown enable |
Voltage references |
Sample & Buy |
View Design Kits & Evaluation Modules |
| MSP430FR5969 |
16 MHz MCU with 64KB FRAM, 2KB SRAM, AES, 12-bit ADC, comparator, DMA, UART/SPI/I2C, timer |
Microcontrollers (MCUs) |
Sample & Buy |
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| OPA333 |
1.8-V, 17-µA, microPower, precision, zero-drift CMOS op amp |
Operational amplifiers (op amps) |
Sample & Buy |
View Design Kits & Evaluation Modules |
| OPA335 |
Single 0.05uV/C max, single-supply CMOS operational amplifier |
Operational amplifiers (op amps) |
Sample & Buy |
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| TPS7A4101 |
50-mA, 50-V, low-IQ, adjustable low-dropout voltage regulator with enable |
Power management |
Sample & Buy |
View Design Kits & Evaluation Modules |
| TPS7B69-Q1 |
Automotive 150-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator |
Power management |
Sample & Buy |
View Design Kits & Evaluation Modules |
CAD/CAE symbols
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Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
Step 3: Open the .bxl file with the Ultra Librarian software.
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Technical documentation
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Datasheet (2)
| | PDF | 3076 |
02 May 2019
|
| | PDF | 1746 |
07 Dec 2018
|
User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 900 |
20 Dec 2017
|
Design files (6)
| | ZIP | 598 |
19 Dec 2017
|
| | ZIP | 868 |
19 Dec 2017
|
| | PDF | 834 |
19 Dec 2017
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| | PDF | 139 |
19 Dec 2017
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| | PDF | 200 |
19 Dec 2017
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| | PDF | 747 |
19 Dec 2017
|
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