LMT90 Texas instruments

LMT90

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LMT90

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Описание

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 LMT90s 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.

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

Local sensor accuracy (max)	4
Operating temperature range (°C)	-40 to 125
Supply voltage (min) (V)	4.5
Supply voltage (max) (V)	10
Supply current (max) (µA)	130
Interface type	Analog output
Sensor gain (mV/°C)	10
Rating	Catalog
Features	Industry standard pinout