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Version 1.0 – May 2025

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Parameter

Sym

bol

Conditions

Min

Typ.

Max

Unit

Comments

Cap bus load

Cb

Rp ≥ 820 Ω: fast mode

-

-

400

pF

Capac. bus load can

be determined from

Cb < trise /(0.8473*Rp).

Rise times are

trise = 300 ns for fast

mode and

trise = 120 ns for fast

mode plus

Rp ≥ 390 Ω,

VDD ≥ 3.0 V: fast mode

plus

-

-

340

pF

Table 5. Continued Electrical Specifications.

4.1 Timings

Parameter

Symbol

Conditions

Min. Typ. Max. Units

Comments

Power-up time

tPU

After hard reset,

VDD ≥ VPOR

-

0.3

1

ms

Time between VDD reaching

VPOR and sensor entering idle

state

Soft reset time

tSR

After soft reset

-

-

1

ms

Time between ACK of soft reset

command and sensor entering

idle state. Also valid for I2C

general call reset.

Measurement

duration

tMEAS,l

Low repeatability

-

1.3

1.6

ms

The three repeatability modes

differ with respect to

measurement duration, noise

level and energy consumption

tMEAS,m Med. repeatability

-

3.7

4.5

ms

tMEAS,h High repeatability

-

6.9

8.3

ms

Heater-on duration

tHeater

Long pulse

0.81

1

1.19

s

After that time the heater is

automatically switched off

Short pulse

0.08 0.1 0.12

s

After that time the heater is

automatically switched off

Table 6. System timing specifications.

4.2 Absolute Maximum Ratings

Stress levels beyond those listed in Table 6 may cause permanent damage or affect the reliability of the device.

These are stress ratings only and functional operation of the device at these conditions is not guaranteed.

Ratings are only tested each at a time.