DAC8740H
- 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.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | DAC874xH HART® and FOUNDATION Fieldbus™ and PROFIBUS PA Modems datasheet (Rev. D) | PDF | HTML | 2019/05/02 |
| Product overview | How to Connect Multiple Field Devices for Hart Communication | PDF | HTML | 2024/03/20 | |
| Application note | A Basic Guide to the HART Protocol | PDF | HTML | 2023/11/09 | |
| Application brief | Designing Foundation Fieldbus and Profibus PA Devices with the DAC874xh Modem Fa | 2019/03/04 | ||
| Application brief | Implementing HART in PLC Analog Input Modules for Real-Time Communication | 2018/11/05 | ||
| Application brief | Implementing HART in 2-Wire Field Sensor-Transmitters | 2018/10/03 | ||
| Technical article | How to HART-enable your analog input module | PDF | HTML | 2018/04/02 | |
| Technical article | Improve your field transmitter designs with HART | PDF | HTML | 2018/02/22 | |
| Technical article | Back to the basics: what is HART protocol and how does it work? | PDF | HTML | 2018/01/26 | |
| EVM User's guide | DAC8742H Evaluation Module User's Guide (Rev. A) | 2017/11/14 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
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| 패키지 | 핀 | 다운로드 |
|---|---|---|
| VQFN (RGE) | 24 | 옵션 보기 |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.