ISOTMP35
- Robust integrated isolation barrier:
- Withstand isolation voltage: 3000VRMS
- Isolation working voltage: 500VRMS
- Isolation barrier life: > 50 years
- Temperature sensor accuracy
- ±0.5°C typical at 25°C
- ±1.2°C maximum from 0°C to 70°C
- ±2.5°C maximum from –40°C to 150°C
- Operating supply range: 2.3V to 5.5V
- Positive slope sensor gain: 10mV/°C, with 500mV offset at 0°C
- Fast thermal response: < 2 seconds
- Short circuit protected output
- Low power consumption: 9µA (typical)
- DFQ (SOIC-7) package
- Safety-related certifications (planned):
- 3kVRMS isolation for 1 minute per UL 1577
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.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | 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 | 2024/6/11 | ||
| Application brief | Marketing Selection Guide For Sensing in Humanoids (Rev. A) | PDF | HTML | 2026/6/4 | |||
| Circuit design | Circuit for driving an ADC with an instrumentation amplifier in high gain (Rev. A) | PDF | HTML | 2024/9/24 | |||
| Circuit design | Driving a SAR ADC directly without a front-end buffer circuit (Rev. B) | PDF | HTML | 2024/9/23 | |||
| 應用說明 | Improving Thermal Response Time and Accuracy in High- Voltage Applications | PDF | HTML | 2024/7/23 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (DFQ) | 7 | Ultra Librarian |