Packaging information
| Package | Pins SOT-23 (DBZ) | 3 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the LMT90
- Cost-Effective Alternative to Thermistors
- Calibrated Directly in Degree Celsius (Centigrade)
- Linear + 10.0 mV/°C Scale Factor
- ±3°C Accuracy Guaranteed at 25°C
- Specified for Full −40° to 125°C range
- Suitable for Remote Applications
- Operates from 4.5 V to 10 V
- Less than 130-µA Current Drain
- Low Self-heating, Less Than 0.2°C in Still Air
- Non-linearity Less Than 0.8°C Over Temp
Description for the LMT90
The LMT90 device is a precision integrated-circuit temperature sensor that can sense a −40°C to +125°C temperature range using a single positive supply. The output voltage of LMT90 is linearly proportional to Celsius (Centigrade) temperature (10 mV/°C) and has a DC offset of 500 mV. The offset allows reading negative temperatures without the need for a negative supply. The ideal output voltage of the LMT90 ranges from 100 mV to 1.75 V for a −40°C to 125°C temperature range. The LMT90 does not require any external calibration or trimming to provide accuracies of ±3°C at room temperature and ±4°C over the full −40°C to +125°C temperature range. Trimming and calibration of the LMT90 at the wafer level assure low cost and high accuracy. The linear output, 500-mV offset, and factory calibration of LMT90 simplify circuitry required in a single-supply environment where reading negative temperatures is required. The LMT90’s quiescent current is less than 130 µA, thus self-heating is limited to a very low 0.2°C in still air.
The LMT90 is a cost-competitive alternative to thermistors.