www.sensirion.com / D1

Version 1 – June 2025

4 / 18

2

Sensor Specifications

2.1 Recommended Environmental Conditions

The sensor is optimized for operation and storage within the environmental conditions listed in Table 2. For

an extended operating range, external pressure input through the set_pressure_compensation command

(Section 3.4.5) can improve CO2 sensing performance.

Parameter

Conditions

Min.

Typ.

Max.

Unit

Operating temperature

10

25

40

°C

Storage temperature

10

25

50

°C

Relative humidity

Non-condensing, max dew point 35 °C

20

50

80

%RH

Pressure

Without pressure compensation

85’000 101’300 110’000

Pa

With pressure compensation

70’000 101’300 110’000

Pa

Table 2. Recommended environmental conditions

2.2 Electrical Specifications

Default conditions of 25 °C and 3.3 V supply voltage apply to the values in Table 3, unless otherwise stated.

Parameter

Sym.

Conditions

Min

Typ

Max

Unit

Supply voltage

VDD

2.7

3.3

5.5

V

Unloaded supply voltage

ripple

VRPP

Without the load of the sensor

30

mV

Peak supply current4

Ipeak

3.7

4.2

mA

Average supply current

⟨IDD⟩

Continuous measurement mode

950

µA

Single shot measurement mode5,

10 s sampling interal

100

µA

Idle mode

55

µA

Sleep mode

1

µA

I2C communication

voltage

VI2C

1.8

VDD

V

Low level input voltage

VIL

0

0.3·VI2C

V

High level input voltage

VIH

0.7·VI2C

VI2C

V

Low level output voltage

VOL

Rp ≥ 1.5 kΩ, max sink current 3 mA

0

0.2·VI2C

V

Capacitive bus load6

Cb

Rp ≥ 1.5 kΩ, max sink current 3 mA,

Fast mode Plus

-

90

pF

Table 3. Electrical specifications

4

Higher transient currents on shorter timescales than 10 microseconds may be observed but are typically negligible due to parasitic

R/L/C elements in design-in.

5

On-demand measurement with adjustable sampling interval. See Section 3.4.6 for more information.

6

Refer to the I2C-bus specification for proper dimensioning to achieve desired communication frequency. NXP I2C-bus specification and

user manual UM10204, Rev.7, 01 November 2021.