SCD42-D-R2 datasheet(4/21 Pages) SENSIRION

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Version 1 – March 2022

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2 Specifications

2.1 Electrical Specifications

Parameter

Symbol Conditions

Min.

Typical

Max.

Units

Supply voltage DC6

VDD

2.4

3.3

5.5

Voltage ripple peak to peak

VRPP

Frequency ≥ 1 kHz

Supply voltage variation7

VVar

Frequency < 1 kHz

±5

Peak supply current8

Ipeak

VDD = 3.3 V

175

205

VDD = 5 V

115

137

Average supply current for periodic

measurement

IDD

VDD = 3.3 V

VDD = 5 V

Input high level voltage

VIH

0.65 x VDD

VDD

Input low level voltage

VIL

0.3 x VDD

Output low level voltage

VOL

3 mA sink current

0.66

Table 4 SCD42 electrical specifications

2.2 Absolute Maximum Ratings

Stress levels beyond those listed in Table 5 may cause permanent damage to the device. Exposure to minimum/maximum

rating conditions for extended periods may affect sensor performance and reliability of the device.

Parameter

Conditions

Value

Temperature operating conditions

0 – 50°C

Humidity operating conditions9

Non-condensing

0 – 95 %RH

MSL Level10

DC supply voltage

- 0.3 V – 6.0 V

Max voltage on pins SDA, SCL, GND

– 0.3 V to VDD+0.3 V

Input current on pins SDA, SCL, GND

- 280 mA to 100 mA

Short term storage temperature11

- 40°C – 70°C

Recommended storage temperature

10 °C – 30 °C

ESD HBM

2 kV

ESD CDM

500 V

Maintenance Interval

Maintenance free when ASC field-

calibration algorithm12 is used.

None

Sensor lifetime13

Typical operating conditions

> 10 years

Table 5: SCD42 operation conditions, lifetime and maximum ratings

Do not change supply voltage during operation

Accuracy can be impaired by excess supply voltage variation caused by external load or temperature variations

Power supply should be designed with respect to peak current.

Accuracy can be reduced at relative humidity levels lower than 10 %.

10 Exceeding MSL 1 storage conditions (30 °C, 85 % RH max.) prior to sensor assembly can lead to degraded sensor performance or sensor failure in the reflow soldering

process.

Short term storage refers to temporary conditions during e.g. transport.

For proper function of ASC field-calibration algorithm the SCD42 has to be exposed to clean air with 400 ppm CO2 concentration regularly.

Sensor tested over simulated lifetime of > 10 years for indoor environment mission profile

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