DAC8741H
HART®, FOUNDATION Fieldbus™, and PROFIBUS PA-compliant modem with SPI interface
DAC8741H
- 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
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 | ||
---|---|---|---|---|
* | Data sheet | DAC874xH HART® and FOUNDATION Fieldbus™ and PROFIBUS PA Modems datasheet (Rev. D) | PDF | HTML | 02 May 2019 |
Application note | A Basic Guide to the HART Protocol | PDF | HTML | 09 Nov 2023 | |
Application brief | Designing Foundation Fieldbus and Profibus PA Devices with the DAC874xh Modem Fa | 04 Mar 2019 | ||
Application brief | Implementing HART in PLC Analog Input Modules for Real-Time Communication | 05 Nov 2018 | ||
Application brief | Implementing HART in 2-Wire Field Sensor-Transmitters | 03 Oct 2018 | ||
EVM User's guide | DAC8742H Evaluation Module User's Guide (Rev. A) | 14 Nov 2017 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
DAC8742HEVM — DAC8742H evaluation module
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 (...)
ANALOG-ENGINEER-CALC — Analog engineer's calculator
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VQFN (RGE) | 24 | Ultra Librarian |
Ordering & quality
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