Si705x Digital Temperature Sensors with I2C Interface

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. 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 little current.

Si705x sensors are fully factory-calibrated and 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, Si705x sensors can operate for several years with just a single coin cell battery. 

Temperature range
-40 to +125 °C
Max accuracy
±0.1 °C

Si705x Temperature Sensor Common Specs

  • High Accuracy Temperature Sensors
    • Si7051: ± 0.1 ºC (max) 3x3 mm
    • Si7053: ± 0.3 ºC (max) 3x3 mm
    • Si7054: ± 0.4 ºC (max) 3x3 mm
    • Si7055: ± 0.5 ºC (max) 3x3 mm
    • Si7050: ± 1.0 ºC (max) 3x3 mm
    • Si7057: ± 0.35 ºC (max) 2x2 mm
    • Si7058: ± 0.5 ºC (max) 2x2 mm
    • Si7059: ±1.0 ºC (max) 2x2 mm
  • Wide operating voltage (1.62 to 1.98 V or 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
  • 2x2 QFN or 3x3 mm DFN package
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Find the Right Si705x Device Select Columns
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Part Number Temp. Accuracy typ (°C) Temp Accuracy Max (°C) Temperature Range (°C) Package Type Package Size (mm) Description
±0.5 ±1.0 -40 125 DFN6 3x3 ± 0.1 ºC to ±1 ºC maximum accuracy 1.8 V supply digital I2C temperature sensors
±0.1 ±0.1 -40 125 DFN6 3x3 ± 0.1 ºC to ±1 ºC maximum accuracy 1.8 V supply digital I2C temperature sensors
±0.2 ±0.3 -40 125 DFN6 3x3 ± 0.1 ºC to ±1 ºC maximum accuracy 1.8 V supply digital I2C temperature sensors
±0.3 ±0.4 -40 125 DFN6 3x3 ± 0.1 ºC to ±1 ºC maximum accuracy 1.8 V supply digital I2C temperature sensors
±0.4 ±0.5 -40 125 DFN6 3x3 ± 0.1 ºC to ±1 ºC maximum accuracy 1.8 V supply digital I2C temperature sensors
±0.2 ±0.35 -40 125 QFN6 2x2 ± 0.1 ºC to ±1 ºC maximum accuracy 1.8 V supply digital I2C temperature sensors
±0.25 ±0.5 -40 125 QFN6 2x2 ± 0.1 ºC to ±1 ºC maximum accuracy 1.8 V supply digital I2C temperature sensors
±0.5 ±1.0 -40 125 QFN6 2x2 ± 0.1 ºC to ±1 ºC maximum accuracy 1.8 V supply digital I2C temperature sensors

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