描述 Description

The XTR108 is a \"smart\", programmable, 4-20mA, two-wire transmitter designed for temperature and bridge sensors. Zero, span, and linearization errors in the analog signal path can be calibrated via a standard digital serial interface, eliminating manual trimming. Non-volatile ex-ternal EEPROM stores calibration settings.
The all-analog signal path contains an input multiplexer, autozeroed programmable-gain instrumentation amplifier, dual programmable current sources, linearization circuit, voltage reference, sub-regulator, internal oscillator, control logic, and an output current amplifier. Programmable level shifting compensates for sensor DC offsets. Selectable up- and down-scale output indicates out-of-range and burn-out per NAMUR NE43. Automatic reset is initiated when supply is lost.

特性 Features

? COMPLETE TRANSMITTER +RTD LINEARIZATION
? TWO-WIRE, 4-20mA OUTPUT
? VOLTAGE OUTPUT (0.5V to 4.5V)
? ELIMINATES POTENTIOMETERS AND TRIMMING
? DIGITALLY CALIBRATED
? 5V SUB-REGULATOR OUTPUT
? SERIAL SPI?BUS INTERFACE
? SSOP-24 PACKAGE
? APPLICATIONS
- REMOTE RTD TRANSMITTERS
? PRESSURE BRIDGE TRANSMITTERS
? STRAIN GAGE TRANSMITTERS
? SCADA REMOTE DATA ACQUISITION
? WEIGHING SYSTEMS
? INDUSTRIAL PROCESS CONTROL
SPI is a trademark of Motorola, Inc. All other trademarks are the property of their respective owners.