The ISOTMP35 is the industry’s first isolated temperature sensor IC, combining an integrated isolation barrier, up to 3000VRMS withstand voltage, with an analog temperature sensor featuring a 10mV/°C slope from –40°C to 150°C. This integration enables the sensor to be co-located with high voltage heat sources (for example: HV FETs, IGBTs, or HV contactors) without requiring expensive isolation circuitry. The direct contact with the high-voltage heat source also provides greater accuracy and faster thermal response compared with approaches where the sensor is placed further away to meet isolation requirements.
Operating from a non-isolated 2.3V to 5.5V supply, the ISOTMP35 allows easy integration into applications where sub-regulated power is not available on the high-voltage plane.
The integrated isolation barrier satisfies UL 1577 requirements. The surface mount package (7-pin SOIC) provides excellent heat flow from the heat source to the embedded thermal sensor, minimizing thermal mass and providing more accurate heat-source measurement. This reduces the need for time-consuming thermal modeling and improves system design margin by reducing mechanical variations due to manufacturing and assembly.
The ISOTMP35 class-AB output driver provides a strong 500µA maximum output to drive capacitive loads up to 1000pF and is designed to directly interface with analog-to-digital converter (ADC) sample and hold inputs.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | ISOTMP35 ±1.2°C , 3-kVRMS Isolated Temperature Sensor With Analog Output With < 2 Seconds Response Time and 500VRMS Working Voltage datasheet (Rev. A) | PDF | HTML | 11 Jun 2024 |
| Circuit design | Circuit for driving an ADC with an instrumentation amplifier in high gain (Rev. A) | PDF | HTML | 24 Sep 2024 | |
| Circuit design | Driving a SAR ADC directly without a front-end buffer circuit (Rev. B) | PDF | HTML | 23 Sep 2024 | |
| Application note | Improving Thermal Response Time and Accuracy in High- Voltage Applications | PDF | HTML | 23 Jul 2024 | |
| EVM User's guide | ISOTMP35B Evaluation Module User's Guide | PDF | HTML | 29 Aug 2023 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (DFQ) | 7 | Ultra Librarian |
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