HART®, FOUNDATION Fieldbus™, and PROFIBUS PA-compliant modem with UART interface
Product details
Parameters
Package | Pins | Size
Features
- HART-compliant physical layer modem
- 1200-Hz, 2200-Hz HART FSK sinusoids
- Register programmable amplitude of TX signals (DAC8741H only)
- Integrated RX demodulator and band-pass filter with minimal external components
- FOUNDATION Fieldbus compatible H1 controller and medium attachment unit (MAU)
- 31.25 kbit/s communication based on Manchester-coded bus powered (MBP)
- Integrated Manchester encoder and decoder
- Compatible with PROFIBUS PA
- Low quiescent current: 180 µA max at typical industrial operating temperature range (–40°C to +85°C)
- Integrated 1.5-V reference
- Flexible clocking options
- Internal oscillator
- External crystal oscillator
- External CMOS clock
- Digital interface
- DAC8740H: UART
- DAC8741H: SPI
- Reliability: CRC bit error checking, watchdog timer (DAC8741H only)
- Wide operating temperature: –55°C to +125°C
- 4-mm × 4-mm QFN package
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Description
The DAC8740H and DAC8741H (DAC874xH) are HART®, FOUNDATION Fieldbus™, and PROFIBUS PA compatible low-power modems designed for industrial process control and industrial-automation applications.
In HART mode, the DAC874xH integrates all of the required circuitry to operate as half-duplex HART physical layer modems, in either slave or master configurations with minimal external components for filtering. In FOUNDATION Fieldbus mode, the DAC874xH integrates all of the required circuitry to operate as half-duplex FOUNDATION Fieldbus compatible H1 controllers and MAUs.
The HART, FOUNDATION Fieldbus, or PROFIBUS PA, data stream can be transferred from the microcontroller through either a UART interface or an integrated FIFO accessed by a SPI interface. The SPI interface includes an SDO pin for daisy-chain support, various interrupts, and other extended features.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | DAC874xH HART® and FOUNDATION Fieldbus™ and PROFIBUS PA Modems datasheet (Rev. D) | May 02, 2019 |
Application note | Designing Foundation Fieldbus and Profibus PA Devices with the DAC874xh Modem Fa | Mar. 04, 2019 | |
Application note | Implementing HART in PLC Analog Input Modules for Real-Time Communication | Nov. 05, 2018 | |
Application note | Implementing HART in 2-Wire Field Sensor-Transmitters | Oct. 03, 2018 | |
Technical articles | How to HART-enable your analog input module | Apr. 02, 2018 | |
Technical articles | Improve your field transmitter designs with HART | Feb. 22, 2018 | |
Technical articles | Back to the basics: what is HART protocol and how does it work? | Jan. 26, 2018 | |
User guide | DAC8742H Evaluation Module User's Guide (Rev. A) | Nov. 14, 2017 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The DAC8742H evaluation module (EVM) is an easy-to-use platform for evaluating the functionality and performance of the DAC8742H device. The DAC8740H, DAC8741H, and DAC8742H are HART®, FOUNDATION Fieldbus™, and PROFIBUS PA-compliant low-power modems designed for industrial (...)
Features
- Features both HART-compliant physical-layer modem and FOUNDATION Fieldbus-compliant H1 controller
- Low quiescent current
- Integrated 1.5-V reference
- Selectable digital interfaces: UART/SPI
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
Reference designs
Design files
-
download TIDA-01504 BOM.pdf (200KB) -
download TIDA-01504 Assembly Drawing.pdf (139KB) -
download TIDA-01504 PCB.pdf (834KB) -
download TIDA-01504 CAD Files.zip (868KB) -
download TIDA-01504 Gerber.zip (598KB)
Design files
-
download TIDA-060020 BOM.pdf (49KB) -
download TIDA-060020 Assembly Drawing.pdf (133KB) -
download TIDA-060020 CAD Files.zip (796KB) -
download TIDA-060020 Gerber.zip (449KB) -
download TIDA-060020 PCB.pdf (595KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RGE) | 24 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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