1 Features

• TMP117 high-accuracy temperature sensor

– ±0.1 °C (maximum) from –20 °C to 50 °C

– ±0.15 °C (maximum) from –40 °C to 70 °C

– ±0.2 °C (maximum) from –40 °C to 100 °C

– ±0.25 °C (maximum) from –55 °C to 125 °C

– ±0.3 °C (maximum) from –55 °C to 150 °C

• Operating temperature range: –55 °C to 150 °C

• Low power consumption:

– 3.5-μA, 1-Hz conversion cycle

– 150-nA shutdown current

• Supply range:

– 1.7 V to 5.5 V from –55 °C to 70 °C

– 1.8 V to 5.5 V from –55 °C to 150 °C

• 16-bit resolution: 0.0078°C (1 LSB)

• Programmable temperature alert limits

• Selectable averaging

• Digital offset for system correction

• General-purpose EEPROM: 48 bits

• NIST traceability

• SMBus™, I2C interface compatibility

• Medical grade: meets ASTM E1112 and ISO

80601-2-56

• RTDs replacement: PT100, PT500, PT1000

2 Applications

• Electronic thermometers

• Wireless environmental sensors

• Thermostats

• Automotive test equipment

• Wearable fitness and activity monitors

• Cold chain asset tracking

• Gas meters and heat meters

• Temperature transmitters

3 Description

The TMP117 is a high-precision digital temperature

sensor. It is designed to meet ASTM E1112

and ISO 80601 requirements for electronic patient

thermometers. The TMP117 provides a 16-bit

temperature result with a resolution of 0.0078 °C

and an accuracy of up to ±0.1 °C across the

temperature range of –20 °C to 50 °C with no

calibration. The TMP117 has in interface that is

I2C- and SMBus™-compatible, programmable alert

functionality, and the device can support up to four

devices on a single bus. Integrated EEPROM is

included for device programming with an additional

48-bits memory available for general use.

The low power consumption of the TMP117 minimizes

the impact of self-heating on measurement accuracy.

The TMP117 operates from 1.7 V to 5.5 V and

typically consumes 3.5 μA.

For non-medical applications, the TMP117 can serve

as a single chip digital alternative to a Platinum RTD.

The TMP117 has an accuracy comparable to a Class

AA RTD, while only using a fraction of the power

of the power typically needed for a PT100 RTD.

The TMP117 simplifies the design effort by removing

many of the complexities of RTDs such as precision

references, matched traces, complicated algorithms,

and calibration.

The TMP117 units are 100% tested on a production

setup that is NIST traceable and verified with

equipment that is calibrated to ISO/IEC 17025

accredited standards.