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2 Specifications

2.1 Electrical Specifications

Table 2 lists electrical specifications of the SGP41. Default conditions of 25 °C and 3.3 V supply voltage apply to values in the

specification and user manual).

Parameter

Symbol

Values

Unit

Comments

Min.

Typ.

Max.

Supply voltage, hotplate supply

VDD,

VDDH

1.7

3.3

3.6

V

Minimal voltage must be guaranteed also for the

maximum supply current specified in this table.

VDD and VDDH must be connected to the same

power supply, see Figure 6.

Idle current

–

34

105

A

The idle mode is activated after power-up, after

calling the sgp4x_turn_heater_off command, or

after a soft reset.

Supply current during conditioning

–

6.5

7.2

mA

Average current consumption while the sensor is

continuously operated at VDD, VDDH = 1.8 V.

–

4.2

4.6

mA

Average current consumption while the sensor is

continuously operated at VDD, VDDH = 3.3 V.

measurement mode10

–

4.3

4.8

mA

Average current consumption while the sensor is

continuously operated at VDD, VDDH = 1.8 V.

–

3.0

3.4

mA

Average current consumption while the sensor is

continuously operated at VDD, VDDH = 3.3 V.

Communication

–

Table 2 Electrical specifications.

2.2 Timing Specifications

Timings in Table 3 refer to the power up and reset of the ASIC part and do not reflect the usefulness of the readings.

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

Power-up time

After hard reset,

VDD ≥ VPOR

–

0.4

0.6

ms

Soft reset time

After soft reset

–

0.4

0.6

ms

SCL clock frequency

–

–

–

400

kHz

Table 3 System timing specifications.

9

Any supply voltage as defined by the min./max. range may be used for continuous operation of the sensor. The typical value specifies the supply voltage at which outgoing

quality control is performed.

10

Sending the sgp41_execute_conditioning and sgp41_measure_raw_signals command enables continuous operation of the sensor. A 20 % higher current is drawn during

5 ms on VDDH after sending either of the two commands.