Packaging information
| Package | Pins SSOP (DFP) | 12 |
| Operating temperature range (°C) -40 to 150 |
| Package qty | Carrier 2,000 | LARGE T&R |
Features for the ISOTMP35R
- Robust integrated isolation:
- Withstand isolation voltage: 5kVRMS
- Isolation working voltage: 1.06kVRMS
- Isolation barrier lifetime: > 15 years
-
Basic isolation option available
- Temperature sensor accuracy:
- ±0.5°C typical at 25°C
- ±2.0°C maximum from 0°C to 70°C
- ±3.0°C maximum from –40°C to 150°C
-
Wide supply range: 3.1V to 34V
- Analog Output:
- 10mV/°C positive slope
- 500mV offset at 0°C
- Output voltage range: 100mV to 2.0V
- Fast thermal response: < 4s
- High CMTI: 65kV/µs
- Low power consumption: 45µA (typical)
-
DFP (SSOP-12) package
- Safety-related certifications:
- 5kVRMS isolation for 1 minute per UL 1577
Description for the ISOTMP35R
The ISOTMP35R is the industry’s first reinforced isolated temperature sensor IC, combining an integrated isolation barrier, up to 5kVRMS 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 such as power MOSFETs, IGBTs, and busbars eliminating the need for external isolation amplifiers or isolated data converters. 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 wide supply range of 3.1V to 34V, the ISOTMP35R enables flexible integration in systems where a regulated low-voltage rail is not available on the high-voltage domain.
The output voltage of the ISOTMP35R ranges from 100mV to 2.0V for a –40°C to 150°C temperature range. The ISOTMP35R does not require any external calibration or trimming to provide a worst-case accuracy of ±0.5°C at room temperature and ±3.0°C over the full –40°C to 150°C temperature range. The linear output, 500mV offset, and factory calibration of the ISOTMP35R simplify the circuitry requirements in a single supply environment where reading negative temperatures is necessary.
The integrated isolation barrier satisfies UL 1577 requirements. The surface mount package (12-pin SSOP) 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.