The LMT88 device is a precision analog output CMOS integrated-circuit temperature sensor
that operates over a temperature range of −55°C to 130°C . The power supply operating range is 2.4
V to 5.5 V. The transfer function of LMT88 is predominately linear, yet has a slight predictable
parabolic curvature. The accuracy of the LMT88 when specified to a parabolic transfer function is
typically ±1.5°C at an ambient temperature of 30°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. At a power supply voltage of 2.7 V to 5.5 V, the temperature range
extremes are 130°C and −55°C. Decreasing the power supply voltage to 2.4 V changes the negative
extreme to −30°C, while the positive remains at 130°C.
The LMT88 quiescent current is less than 10 μA. Therefore, self-heating is less than
0.02°C in still air. Shutdown capability for the LMT88 is intrinsic because its inherent low power
consumption allows it to be powered directly from the output of many logic gates or does not
necessitate shutdown at all.
The LMT88 is a cost-competitive alternative to thermistors.
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