www.sensirion.com

November 2016 - Version 1

3/17

2 Specifications

2.1

Electrical Specifications

Parameter

Symbol

Condition

Min.

Typ.

Max.

Units Comments

Supply voltage

2.4

3.3

5.5

V

Power-up/down level

2.1

2.3

2.4

V

Slew rate change of the

supply voltage

-

-

20

V/ms

Voltage changes on the

VDD line between

should be slower than

the maximum slew rate;

faster slew rates may

lead to reset;

Supply current

idle state

(single shot mode)

-

0.2

2.0

A

Current when sensor is

not performing a

measurement during

single shot mode

idle state

(periodic data

acquisition mode)

-

45

70

A

Current when sensor is

not performing a

measurement during

periodic data acquisition

mode

Measuring

-

800

1500

A

Current consumption

while sensor is

measuring

Average

-

2

-

A

Current consumption

(operation with one

measurement per

second at lowest

repeatability, single shot

mode)

Alert Output driving

strength

IOH

mA See also section 3.5

Heater power

Heater running

4.5

-

33

mW

Depending on the

supply voltage

Table 2 Electrical specifications, valid at 25°C.

2.2

Timing Specification for the Sensor System

Parameter

Symbol

Conditions

Min.

Typ.

Max. Units Comments

Power-up time

After hard reset,

-

0.5

1

ms

state

Soft reset time

After soft reset.

-

0.5

1

ms

Time between ACK of soft

reset command and sensor

entering idle state

Duration of reset pulse

1

-

-

µs See section 3.6

Measurement duration

Low repeatability

2.5

4

ms The three repeatability modes

differ with respect to

measurement duration, noise

level and energy consumption

Medium repeatability

4.5

6

ms

High repeatability

12.5

15

ms

Table 3 System timing specification, valid from -40 °C to 125 °C and 2.4 V to 5.5 V.