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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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | 4-20mA, Two-Wire Transmitter, 'Smart' Programmable with Signal Conditioning datasheet (Rev. C) | 12 Jul 2005 | |
| White paper | Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) | PDF | HTML | 30 Apr 2024 | |
| EVM User's guide | XTR108EVM-USB Evaluation Board and Software Tutorial (Rev. A) | 15 Sep 2016 | ||
| Analog Design Journal | 4Q 2011 Issue Analog Applications Journal | 09 Nov 2011 | ||
| Analog Design Journal | Analog linearization of resistance temperature detectors | 09 Nov 2011 | ||
| EVM User's guide | XTR108EVM User's Guide (Rev. A) | 27 Oct 2005 |
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