TMP03 Datasheet | Analog Devices

FEATURES 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 m W Max at 5 V Flexible Open-Collector Output on TMP03 CMOS/TTL-patible Output on TMP04 Low Voltage Operation (4.5 V to 7 V) APPLICATIONS Isolated Sensors Environmental Control Systems puter Thermal Monitoring Thermal Protection Industrial Process Control Power System Monitors GENERAL DESCRIPTION The TMP03/TMP04 are monolithic temperature detectors that generate a modulated serial digital output that varies in direct proportion to the temperature of the device. An onboard sensor generates a voltage precisely proportional to absolute temperature which is pared to an internal voltage reference and input to a precision digital modulator. The ratiometric encoding format of the serial digital output is independent of the clock drift errors mon to most serial modulation techniques such as voltage-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/TTL patible, and is easily interfaced to the serial inputs of most popular microprocessors. The open-collector output of the TMP03 is capable of sinking 5 m A. The TMP03 is best suited for systems requiring isolated circuits utilizing optocouplers or isolation transformers. The TMP03 and TMP04 are specified for operation at supply voltages from 4.5 V to 7 V. Operating from 5 V, supply current (unloaded) is less than 1.3 m A. The TMP03/TMP04 are rated for operation over the - 40°C to +100°C temperature range in the low cost TO-92, SO-8, and TSSOP-8 surface mount packages. Operation extends to 150°C with reduced accuracy. (continued on page 4) FUNCTIONAL BLOCK DIAGRAM TMP03/TMP04 TEMPERATURE SENSOR VPTAT DIGITAL MODULATOR VREF 123 DOUT V+ GND PACKAGE TYPES AVAILABLE TO-92 TMP03/TMP04 123 DOUT V+ GND BOTTOM VIEW (Not to...