Si705x Digital Temperature Sensors with I2C Interface

The Si705x Digital Temperature Sensors offer industry-leading low power consumption and high accuracy across the entire operating voltage and temperature range. These monolithic CMOS ICs feature a band-gap temperature sensor element, an analog-to-digital converter with up to 14-bit resolution, signal processing, calibration data, and an I2C interface. The patented use of novel signal processing and analog design enables the sensors to maintain their accuracy over a wide temperature and voltage range, while consuming very little current.

The Si705x devices are fully factory-calibrated and are available in a 3x3 mm DFN package. The industry-standard I2C interface can operate at up to 400 kHz. Requiring just 195nA of average current when sampled once per second, the Si705x can operate for several years with just a single coin cell battery.


Measuring Temperature Accurately with Semiconductor Sensors

Learn how to achive better results from your temperature-related designs.


  • High Accuracy Temperature Sensors
    • Si7051: ± 0.1 ºC (max)
    • Si7053: ± 0.3 ºC (max)
    • Si7054: ± 0.4 ºC (max)
    • Si7055: ± 0.5 ºC (max)
    • Si7050: ± 1.0 ºC (max)
  • Wide operating voltage (1.9 to 3.6 V)
  • -40 to +125 ºC operating range
  • Accuracy maintained over the entire operating temperature and voltage range
  • Low Power Consumption
    • 195 nA average current @ 1 Hz sample rate
  • 14-bit resolution
  • Factory calibrated
  • I2C interface
  • 3x3 mm DFN package
  • AEC-Q100 automotive qualified

Si705x Product Matrix

Part Number Data Sheet Dev KIt Description Temp. Accuracy typ (°C) Temp. Accuracy max (°C) Temperature Range (°C) Package Type
Si7050-EVB Digital I2C Temperature Sensor ±0.5 ±1.0 -40 125 DFN6
Si7051-EVB Digital I2C Temperature Sensor ±0.1 ±0.1 36 41 DFN6
Si7053-EVB Digital I2C Temperature Sensor ±0.2 ±0.3 -40 125 DFN6
Si7054-EVB Digital I2C Temperature Sensor ±0.3 ±0.4 -40 125 DFN6
Si7055-EVB Digital I2C Temperature Sensor ±0.4 ±0.5 -40 125 DFN6
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