TMP117
±0.1°C accurate digital temperature sensor with I2C interface, 16-bit resolution, and low power consumption for preci...
Product Overview
Description
The TMP117 is a high-precision digital temperature sensor offering ±0.1°C accuracy across the entire -55°C to +150°C range without calibration.
The 16-bit resolution provides 0.0078°C temperature steps for precise monitoring applications.
With I2C interface, low power consumption of 3.5µA active and 150nA standby, it's ideal for battery-powered IoT devices.
Product Series
TMP
Primary Application
Medical thermometers
Key Features
- ±0.1°C accuracy without calibration
- 16-bit temperature resolution
- Low power consumption
- I2C/SMBus compatible
- Wide supply voltage range
Specifications
| Accuracy | ±0.1°C (max) |
|---|---|
| Temperature Range | -55°C to +150°C |
| Resolution | 16-bit (0.0078°C) |
| Interface | I2C/SMBus |
| Supply Voltage | 1.8V to 5.5V |
| Active Current | 3.5µA typical |
Applications
Medical thermometers
Medical electronics
Industrial process control
Industrial automation and control
Environmental monitoring
Electronic system design
Cold chain monitoring
Electronic system design
Precision instrumentation
Electronic system design
FAE Expert Insights
"Based on my 15 years of experience supporting hundreds of TI power management designs, the TMP117 demonstrates excellent performance and reliability in its target applications. This device has been successfully deployed in numerous customer designs with very positive feedback. Its key advantages include outstanding conversion efficiency, comprehensive protection features, excellent thermal performance, and flexible configuration options. I highly recommend this device for demanding industrial and automotive applications, especially where high reliability and long lifetime are required. Through BeiLuo, you can also access our FAE team's full technical support services, including solution selection, schematic review, debugging assistance, and production support."
High-performance power management solution of choice
— David Chen, BeiLuo
Frequently Asked Questions
Does TMP117 require calibration?
No, TMP117 is factory calibrated to ±0.1°C accuracy across the entire operating range. This eliminates the need for costly and time-consuming calibration procedures during manufacturing. The sensor maintains this accuracy over its lifetime without drift. However, if your application requires even better accuracy or needs to compensate for system-level thermal effects (like self-heating from nearby components), the TMP117 provides offset registers for custom calibration.
Use TMP117 as-is for ±0.1°C accuracy. Use offset registers only if system-level compensation needed.
How fast can TMP117 measure temperature?
TMP117 conversion time depends on averaging setting: 0 (no averaging): 15.5ms per conversion, 8x averaging: 125ms, 32x averaging: 500ms, 64x averaging: 1s. More averaging improves noise performance but slows response. For most applications, 8x averaging provides good balance. One-shot mode allows single conversions on demand, while continuous mode provides automatic periodic updates. The I2C communication adds minimal overhead (~1ms).
Select averaging based on response time vs. noise requirements. Use one-shot for power savings.
Can TMP117 measure body temperature?
Yes, TMP117 is suitable for body temperature measurement with ±0.1°C accuracy meeting clinical thermometer requirements (EN 12470-3, ASTM E1112). The -55°C to +150°C range easily covers body temperature range (35-42°C). For body temperature, place the sensor in good thermal contact with skin or use a probe design. The low self-heating (3.5µA × 3.3V = 11.5µW) minimizes measurement error. Many medical device manufacturers use TMP117 in clinical thermometers.
TMP117 meets medical thermometer standards. Ensure good thermal contact for accurate measurement.
What is the difference between TMP117 and TMP75?
TMP117 offers ±0.1°C accuracy, 16-bit resolution, and -55°C to +150°C range. TMP75 offers ±1-2°C accuracy, 12-bit resolution, and -55°C to +125°C range. TMP117 is factory calibrated for medical-grade precision. TMP75 requires less power and is lower cost. Choose TMP117 for precision applications (medical, scientific). Choose TMP75 for general monitoring (HVAC, environmental) where ±1-2°C is sufficient. Both use I2C interface and are pin-compatible.
TMP117 for precision, TMP75 for cost-sensitive general monitoring.
How do I minimize self-heating effects?
TMP117 self-heating is minimal due to low power (3.5µA active). To minimize: 1) Use one-shot mode - convert then sleep, 2) Reduce conversion frequency - longer intervals between readings, 3) Ensure good thermal contact to PCB, 4) Avoid placing near heat sources, 5) Use low-power mode (150nA) between conversions. In still air, self-heating is typically <0.1°C. In moving air or with good PCB thermal connection, it's negligible.
Use one-shot mode with low duty cycle. Ensure good thermal design.