SHT40-AD1P-R2 datasheet(9/24 Pages) SENSIRION

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Electrical Specifications

Parameter

Symbol

Conditions

Min Typ Max Unit

Comments

Supply voltage

VDD

1.08 3.3

3.6

Power-up/down

VPOR

Static power supply

0.6

1.08

Slew rate of the

supply voltage

VDD, slew

V/m

Voltage changes on the

supply between VDD, min

and VDD, max. Faster slow

rates may lead to a reset

Supply

current

(heater off)

IDD

Idle state

0.08

1.0

3.4

µA

At 25 °C

At 125 °C

Power up

µA

Measurement

320 500

µA

Current while sensor is

measuring

Avg., high repeatability

Avg., med. repeatability

Avg., low repeatability

2.2

1.2

0.4

µA

Avg. current consumption

(continuous operation with

1 meas. per second)

Supply

current

(heater on)

IDD

Nomin. heater “200 mW”

100 mA

see section 4.9

Nomin. heater “110 mW”

Nomin. heater “20 mW”

Power consumpt.

at VDD=1.2 V

(no heater)

Avg., high repeatability

Avg., med. repeatability

Avg., low repeatability

2.6

1.4

0.5

µW

Avg. power consumption

(continuous operation with

1 meas. per second)

Low level input

voltage

VIL

0.3*

VDD

High level input

voltage

VIH

0.7*

VDD

Pull up resistors

VDD < 1.62 V

820

Ω

VDD ≥ 1.62 V

390

Ω

Low level output

voltage

VOL

VDD < 1.62 V,

Rpullup > 820 Ω

0.2*

VDD

VDD = 1.62 V … 2.0 V,

Rpullup > 390 Ω

0.2*

VDD

VDD > 2.0 V,

Rpullup > 390 Ω

0.4

Capacitive bus load

RP ≤ 820 Ω: fast mode

400

Capacitive bus load can be

determined from

Cb < trise /(0.8473*Rp).

Rise times are trise = 300 ns

for fast mode &

trise = 120 ns for fast mode

plus

Rp = 390 Ω,

VDD > 1.62 V: fast mode

plus

340

Table 4. Electrical specifications.

SHT40-AD1P-R2 数据表(PDF) 9 Page - Sensirion AG Switzerland

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