SD2085 Overview
Description
The SD2085 is a CMOS single chip modem IC used in Highway Addressable Remote Transducer (HART) field instruments and masters. This IC integrates all necessary filtering, signal detection, modulating, demodulating, and HART signal wave shaping functions.
Key Features
- Single chip, half duplex 1200 bps FSK modem
- Meets HART physical layer requirements
- Bell 202 shift frequencies of 1200Hz and 2200Hz
- Buffered HART output for drive capability
- Digital signal processing provides reliable input signal detection
- UART interface
- 2.7V to 3.6V power supply
- 85μA maximum supply current in transmit mode
- 55°C to +125°C operation range
- RoHS compliant
