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Summary description

The STLM20 is a precision analog output temperature sensor for low current applications where maximizing battery life is important. It operates over a –55°C to 130°C (grade 7) or –40°C to 85°C (grade 9) temperature range. The power supply operating range is 2.4V to 5.5V. The accuracy of the STLM20 is ± 1.5°C, at an ambient temperature of 25°C. The temperature error increases linearly and reaches a maximum of ±2.5°C at the temperature range extremes. The temperature range is affected by the power supply voltage. For the temperature grade 7 device, a power supply voltage of 2.7V to 5.5V, the temperature range extremes are +130°C and –55°C. Decreasing the power supply voltage to 2.4V changes the negative extreme to –30°C, while the positive remains at +130°C.

The STLM20 has a maximum quiescent supply current of 8μA. Therefore, self-heating is negligible.

Feature summary

■ Precision analog voltage output temperature sensor

■ ±1.5°C temperature accuracy at 25°C

■ Ultra-low quiescent supply current: 8.0μA (max)

■ Operating voltage range: 2.4V to 5.5V

■ Operating temperature range:

–55°C to 130°C (grade - 7)

–40°C to 85°C (grade - 9)

■ SOT323-5 (SC70-5) 5-lead package

■ UDFN 4-lead package

Applications

■ Third generation (3G) cell phones

■ Multimedia PDA devices

■ GPS devices

■ Portable medical instruments

■ Voltage-controlled crystal oscillator temperature monitors

■ RF Power transistor monitor