Si7006/13/20/21/34 Relative Humidity and Temperature Sensor with I2C Interface

The Si7006/13/20/21/34 devices are Silicon Labs’ latest generation I2C relative humidity and temperature sensors. All members of this device family combine fully factory-calibrated humidity and temperature sensor elements with an analog to digital converter, signal processing and an I2C host interface. Patented use of industry-standard low-K polymer dielectrics provides excellent accuracy and long term stability, along with low drift and low hysteresis. The innovative CMOS design also offers the lowest power consumption in the industry for a relative humidity and temperature sensor. The Si7013/20/21/34 devices are designed for high-accuracy applications, while the Si7006 is targeted toward lower-accuracy applications that traditionally have used discrete RH/T sensors.

With full factory calibration, all Si70xx devices require no addition RH/temperature calibration during PCB assembly. The 2nd generation Si7006/13/20/21 devices feature a 3 mm x 3 mm package and wide 1.9 to 3.6 V power supply voltage, while the 3rd generation Si7034 device features a smaller 2 mm x 2 mm package and a low 1.67 V to 1.98 V power supply voltage popular in wearable and consumer devices. For protection against dust, dirt and chemical contaminants the Si7006/13/20/21 devices can be fitted with an optional factory-installed cover. In addition, designs that require 2-zone temperature sensing will benefit from the Si7013’s auxiliary sensor input with programmable linearization.

 

Features

  • Precision Relative Humidity Sensor:
    • Si7013/21: ± 3% RH (maximum) @ 0–80% RH
    • Si7020/34: ± 4% RH (maximum) @ 0–80% RH
    • Si7006: ± 5% RH (maximum) @ 0–80% RH
  • Temperature Sensor:
    • Si7013/20/21/34: ±0.4 °C accuracy (maximum) @ -10 to +85 °C
    • Si7006: ±1.0 °C accuracy (maximum) @ -10 to +85 °C
  • 0 to 100% RH operating range
  • Up to -40 to +125 °C operating range
  • Wide operating voltage range
    • Si7006/13/20/21: 1.9 to 3.6 V
    • Si7034: 1.67 V to 1.98 V
  • Low Power Consumption:
    • 2.2 µW at 3.3 V, 1 Hz (Si7006/13/20/21)
    • 0.9 µW at 1.8 V, 1 Hz (Si7034)
  • I2C host interface
  • Integrated on-chip heater
  • Tiny DFN package
    • Si7006/13/20/21: 3 mm x 3 mm
    • Si7034: 2 mm x 2 mm
  • Excellent long term stability
  • Factory calibrated
  • Optional factory-installed filter/cover
    • Lifetime protection during reflow and in operation
    • Protects against contamination from dust, dirt, household chemicals and other liquids
    • AEC-Q100 automotive qualified (Si7013/20/21/34)

Si7006/13/20/21/34 Product Matrix

Devices
Part Number Description Data Sheet Dev Kit Temp Accuracy max (°C) RH Accuracy (max) Temperature Range (°C) Filter Cover Package Format Package Type
Dig I2C RH + Temp Sensor Si7006-07-EVB ±1 ±5% -40 125 No Tube DFN6
Dig I2C RH + Temp Sensor Si7006-07-EVB ±1 ±5% -40 125 Yes Cut Tape DFN6
Dig I2C RH + Temp Sensor Si7013USB-DONGLE ±0.4 ±3% -40 85 No Tube DFN10
Dig I2C RH + Temp Sensor Si7013USB-DONGLE ±0.4 ±3% -40 85 Yes Cut Tape DFN10
Dig I2C RH + Temp Sensor Si7013USB-DONGLE ±0.4 ±3% -40 125 No Tube DFN10
Dig I2C RH + Temp Sensor Si7013USB-DONGLE ±0.4 ±3% -40 125 Yes Cut Tape DFN10
Dig I2C RH + Temp Sensor ±0.4 ±4% -40 85 No Tube DFN6
Dig I2C RH + Temp Sensor ±0.4 ±4% -40 85 Yes Cut Tape DFN6
Dig I2C RH + Temp Sensor ±0.4 ±4% -40 125 No Tube DFN6
Dig I2C RH + Temp Sensor ±0.4 ±4% -40 125 Yes Cut Tape DFN6
Dig I2C RH + Temp Sensor ±0.4 ±3% -40 85 No Tube DFN6
Dig I2C RH + Temp Sensor ±0.4 ±3% -40 85 Yes Cut Tape DFN6
Dig I2C RH + Temp Sensor ±0.4 ±3% -40 125 No Tube DFN6
Dig I2C RH + Temp Sensor ±0.4 ±3% -40 125 Yes Cut Tape DFN6
Dig I2C RH + Temp Sensor Si7034-EVB ±0.4 ±4% -40 125 No Cut Tape QFN6
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