Si705x Digital Temperature Sensors with I2C Interface

The Silicon Labs 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 little current. 

The Si705x devices 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, the Si705x can operate for several years with just a single coin cell battery. 

 

Measuring Temperature Accurately with Semiconductor Sensors

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

Features

  • 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 (1.62V to 1.98V or 1.9V 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

Si705x Product Matrix

Devices
Part Number Data Sheet Dev KIt Description Temp. Accuracy typ (°C) Temp. Accuracy max (°C) Temperature Range (°C) Package Type Package Size (mm)
Si7050-EVB Digital I2C Temperature Sensor ±0.5 ±1.0 -40 125 DFN6 3x3
Si7051-EVB Digital I2C Temperature Sensor ±0.1 ±0.1 36 41 DFN6 3x3
Si7053-EVB Digital I2C Temperature Sensor ±0.2 ±0.3 -40 125 DFN6 3x3
Si7054-EVB Digital I2C Temperature Sensor ±0.3 ±0.4 -40 125 DFN6 3x3
Si7055-EVB Digital I2C Temperature Sensor ±0.4 ±0.5 -40 125 DFN6 3x3
Si7057-EVB 1.8V Supply Digital I2C Temperature Sensor ±0.2 ±0.35 -40 125 QFN6 2x2
Si7057-EVB 1.8V Supply Digital I2C Temperature Sensor ±0.25 ±0.5 -40 125 QFN6 2x2
Si7057-EVB 1.8V Supply Digital I2C Temperature Sensor ±0.5 ±1.0 -40 125 QFN6 2x2
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