The TMP03/TMP04 are monolithic temperature detectors thatgenerate a modulated serial digital output that varies in directproportion to the temperature of the device. An onboard sensorgenerates a voltage precisely proportional to absolute temperaturewhich is compared to an internal voltage reference andinput to a precision digital modulator. The ratiometric encodingformat of the serial digital output is independent of the clock drifterrors common to most serial modulation techniques such asvoltage-to-frequency converters. Overall accuracy is ±1.5°C(typical) from –25°C to +100°C, with excellent transducer linearity.The digital output of the TMP04 is CMOS/TTLcompatible, and is easily interfaced to the serial inputs of mostpopular microprocessors. The open-collector output of theTMP03FT9 is capable of sinking 5 mA. The TMP03FT9 is best suitedfor systems requiring isolated circuits utilizing optocouplers orisolation transformers.
The TMP03FT9 and TMP04 are specified for operation at supplyvoltages from 4.5 V to 7 V. Operating from 5 V, supply current(unloaded) is less than 1.3 mA.
The TMP03/TMP04 are rated for operation over the –40°C to+100°C temperature range in the low cost TO-92, SO-8, andTSSOP-8 surface mount packages. Operation extends to 150°Cwith reduced accuracy.
Feature
- Low cost 3-pin package
- Modulated serial digital output
- Proportional to temperature
- ±1.5°C accuracy (typ) from –25°C to +100°C
- Specified –40°C to +100°C, operation to 150°C
- Power consumption 6.5 mW max at 5 V
- Flexible open-collector output
- Low voltage operation (4.5 V to 7 V)
Applications
- Isolated sensors
- Environmental control systems
- Computer thermal monitoring
- Thermal protection
- Industrial process control
- Power system monitors
(Picture: Pinout)
