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.
SPI is a trademark of Motorola, Inc. All other trademarks are the property of their respective owners.
| Vs (min) (V) | 4.5 |
| Vs (max) (V) | 5.5 |
| Offset voltage drift (±) (max) (V/°C) | 0.0000001 |
| Offset voltage (±) (max) (V) | 0.00005 |
| Product type | 2-wire RTD conditioner |
| Operating temperature range (°C) | -40 to 85 |
| Rating | Catalog |
| SSOP (DBQ) | 24 | 51.9 mm² 8.65 x 6 |
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