TMP17 is a monolithic integrated circuit temperature transducer that provides an output current proportional to absolute temperature. For a wide range of supply voltages, the transducer acts as a high impedance temperature dependent current source of 1 µA/K. Improved design and laser wafer trimming of the IC's thin-film resistors allow the TMP17 to achieve absolute accuracy levels and nonlinearity.
The TMP17 is a low‑cost, current‑output temperature transducer that converts absolute temperature to a proportional current of 1 µA per kelvin. It operates from a single supply of 4 V to 30 V and provides a high‑impedance output that is immune to voltage noise and lead resistance.
The device is supplied in an 8‑lead SOIC package and includes features such as wide temperature range, excellent repeatability, built‑in ESD protection, and ruggedness against supply irregularities. Application notes cover calibration trims, multiplexed sensor arrays, differential measurements, and 4‑20 mA transmitter designs.
| Operating Temperature Range | -40 °C to +105 °C |
|---|---|
| Supply Voltage Range | 4 V to 30 V |
| Output Current Scale Factor | 1 µA/K |
| Accuracy at 25 °C (TMP17F) | +2.5 °C |
| Accuracy at 25 °C (TMP17G) | +3.5 °C |
| Power Supply Rejection Ratio (5 V–15 V) | 0.3 °C/V |
| Power Supply Rejection Ratio (15 V–30 V) | 0.3 °C/V |
| Nonlinearity (Over Rated Temperature) | 0.5 °C |
| Long‑Term Stability | 0.2 °C/month at 150 °C for 500 h |
The TMP17 provides a temperature‑dependent current output of 1 µA per kelvin.
The device operates from a single supply of 4 V to 30 V.
Accuracy can be improved by applying a single‑temperature trim to the scale factor, or by using a two‑temperature trim circuit to remove both calibration and scale‑factor errors.
Yes, multiple TMP17 devices can be connected in parallel or series and switched with CMOS multiplexers without affecting accuracy, provided a minimum 4 V across the transducer is maintained.