DAC8740H (正在供货)

HART®, Fieldbus Foundation, and PROFIBUS PA-Compliant Modem With UART Interface

HART®, Fieldbus Foundation, and PROFIBUS PA-Compliant Modem With UART Interface - DAC8740H
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描述

The DAC8740H, DAC8741H, and DAC8742H 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.

特性

  • HART-Compliant Physical Layer Modem
    • 1200/2200 Hz HART FSK Sinusoids
    • Register Programmable Amplitude of TX Signals
      (DAC8741H / DAC8742H 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 uA 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
    • DAC8742H: UART and SPI
  • Reliability: CRC Bit Error Checking, Watchdog Timer (DAC8741H and DAC8742H only)
  • Wide Operating Temperature: –55°C to 125°C
  • 4 mm x 4 mm QFN and 5 mm x 5 mm TQFP Packages

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参数 与其它产品相比 精密 DACs (<=10MSPS)

 
Interface
Rating
Pin/Package
Operating Temperature Range (C)
Features
DAC8740H DAC8742H
UART    SPI
UART   
Catalog    Catalog   
24VQFN    32TQFP   
-55 to 125    -55 to 125   
FOUNDATION Fieldbus MAU
HART Modem
Profibus PA Modem   
FOUNDATION Fieldbus MAU
HART Modem
Profibus PA Modem