HTS221 datasheet(8/33 Pages) STMICROELECTRONICS

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Sensor parameters and electrical specifications

HTS221

8/33

DocID026333 Rev 4

Sensor parameters and electrical specifications

Conditions at VDD = 2.5 V, T = 25 °C, unless otherwise noted.

Table 3. Humidity and temperature parameter specifications

Symbol

Parameter

Test condition

Min.

Typ.(1)

Max.

Unit

Hop

Operating humidity range

–

100

% rH

Hbit

Humidity output data

–

bit

Humidity sensitivity

0.004

%rH/LSB

256

LSB/%rH

Hacc

Humidity accuracy(2)

20 to 80% rH

±3.5

% rH

0 to 100% rH

±5

Hnoise

Humidity noise(3)

0.03

RMS

Hhys

Humidity hysteresis

±1

% rH

Hstep

Humidity response time(4)

t @ 63%

Hdrift

Humidity long-term drift

20 to 80% rH

0.5

%rH/yr

Top

Operating temperature range

-40

–

120

°C

Tbit

Temperature output data

–

bit

Temperature sensitivity

0.016

°C/LSB

LSB/°C

Tacc

Temperature accuracy

15 to 40 °C

±0.5

°C

0 to 60 °C

±1

Tnoise

Temperature noise(3)

0.007

RMS

Tstep

Temperature response time

t @ 63%

Tdrift

Temperature long-term drift

T = 0 to 80 °C

0.05

°C/yr

ODR

Humidity and temperature digital output

data rate

1/7/12.

1. Typical specifications are not guaranteed

2. Accuracy in non condensing environment including hysteresis

3. Default value; noise value can be modified by AV_CONF (10h)

4. Valid at 25 °C and 1 m/s airflow

Table 4. Electrical characteristics

Symbol

Parameter

Test condition

Min. Typ.(1)

Max.

Unit

VDD

Supply voltage

1.7

–

3.6

IDD

Supply current (2)

1 Hz, 25 °C, 2.5 V

μA

IDDPDN

Supply current in power-down mode

T = 25 °C

25 °C, 2.5 V

–

0.5

–

μA

1. Typical specifications are not guaranteed

2. Refer to Table 16.

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