DAC8741H - Texas Instruments

DAC8741H low-power modems

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 wit.

Features

•1 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 clockin.