TMP03/TMP04: Serial Digital Output Thermometers Data Sheet (Rev. B)10/6/1995308 K
Features and Benefits
- Low Cost 3-Pin Package
- Modulated Serial Digital Output
Proportional to Temperature
- ±1.5C Accuracy (typ) from –25C to +100C
- Specified –40C to +100C, Operation to 150C
- Power Consumption 6.5 mW Max at 5 V
- Flexible Open-Collector Output on TMP03
- CMOS/TTL-Compatible Output on TMP04
- Low Voltage Operation (4.5 V to 7 V)
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 compared 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 common 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 compatible, and is easily interfaced to the serial inputs of most popular microprocessors. The open-collector output of the TMP03 is capable of sinking 5 mA. 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 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, and TSSOP-8 surface mount packages. Operation extends to 150°C with reduced accuracy.
- Isolated sensors
- Environmental control systems
- Computer thermal monitoring
- Thermal protection
- Industrial process control
- Power system monitors
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Digital-Output Sensor Simplifies Temperature Acquisition1/1/1996 Analog Dialogue