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

Our Si7006/13/20/21/34 family is our latest generation of I2C relative humidity and temperature sensors. All devices combine fully factory-calibrated humidity and temperature sensor elements with an analog-to-digital converter, signal processing, and an I2C host interface. The Si7013/20/21/34 sensors are designed for high-accuracy applications, while Si7006 is targeted toward lower-accuracy applications traditionally using discrete RH/T sensors.

Featuring innovative CMOS design, these devices offer the lowest power consumption in the industry for a relative humidity and temperature sensor. Patented use of industry-standard low-K polymer dielectrics provides excellent accuracy and long-term stability, along with low drift and low hysteresis. 

With full factory calibration, all Si70xx devices require no additional RH/temperature calibration during PCB assembly. The second generation Si7006/13/20/21 devices feature a 3x3 mm package and wide 1.9 to 3.6 V power supply voltage, while the third generation Si7034 devices feature a smaller 2x2 mm package and a low 1.67 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 requiring 2-zone temperature sensing will benefit from the Si7013’s auxiliary sensor input with programmable linearization.

Temperature range
-40 to +125 °C
RH accuracy max
±5%

Si7006/13/20/21/34 Humidity Sensor Common Specs

  • 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 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: 3x3 mm
    • Si7034: 2x2 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
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Find the Right Si7006/13/20/21/34 Device Select Columns
Select Columns
Part Number Description Temp Accuracy Max (°C) RH Accuracy Max Temperature Range (°C) Filter Cover Package Format Package Type
Digital I2C 4% RH + temp sensor ±1 ±5% -40 125 Tube DFN6
Digital I2C 4% RH + temp sensor + cover ±1 ±5% -40 125 Cut Tape DFN6
Digital I2C 2% RH + 2-zone temp sensor ±0.4 ±3% -40 85 Tube DFN10
Digital I2C 2% RH + 2-zone temp sensor + cover ±0.4 ±3% -40 85 Cut Tape DFN10
Digital I2C 2% RH + 2-zone temp sensor ±0.4 ±3% -40 125 Tube DFN10
Digital I2C 2% RH + 2-zone temp sensor + cover ±0.4 ±3% -40 125 Cut Tape DFN10
Digital I2C 3% RH + temp sensor ±0.4 ±4% -40 85 Tube DFN6
Digital I2C 3% RH + temp sensor + cover ±0.4 ±4% -40 85 Cut Tape DFN6
Digital I2C 3% RH + temp sensor ±0.4 ±4% -40 125 Tube DFN6
Digital I2C 3% RH + temp sensor + cover ±0.4 ±4% -40 125 Cut Tape DFN6
Digital I2C 2% RH + temp sensor ±0.4 ±3% -40 85 Tube DFN6
Digital I2C 2% RH + temp sensor + cover ±0.4 ±3% -40 85 Cut Tape DFN6
Digital I2C 2% RH + temp sensor ±0.4 ±3% -40 125 Tube DFN6
Digital I2C 2% RH + temp sensor + cover ±0.4 ±3% -40 125 Cut Tape DFN6
Digital I2C 3% RH + temp sensor ±0.4 ±4% -40 125 Cut Tape QFN6

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