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ILPS22QSTR 数据表(PDF) 7 Page - STMicroelectronics

部件名 ILPS22QSTR
功能描述  Dual full-scale, 1260 hPa and 4060 hPa, absolute digital output barometer with embedded Qvar electrostatic sensor
PDF  57 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ILPS22QSTR 数据表(HTML) 7 Page - STMicroelectronics

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3.2
Electrical characteristics
VDD = 1.8 V, T = 25 °C, unless otherwise noted.
Table 4. Electrical characteristics - pressure and temperature
Symbol
Parameter
Test condition
Min. Typ.(1) Max. Unit
VDD
Supply voltage
1.7
3.6
V
Vdd_IO IO supply voltage
1.08
3.6
V
Idd
Supply current for pressure acquisition
@ 1 Hz one-shot
AVG = 4 by disabling AH and Qvar(2)
AVG = 4 by enabling AH and Qvar
1.8
4.3
µA
@ 1 Hz one-shot
AVG = 128 by disabling AH and Qvar(2)
AVG = 128 by enabling AH and Qvar
9.2
11.7
Supply current for Qvar (enabling AH and Qvar) AVG = 32 and ODR = 25 Hz
46.5
IddPdn
Power-down current by disabling AH and
Qvar(2)
Power-down current by enabling AH and Qvar
1
3.6
µA
1. Typical specifications are not guaranteed.
2. To disable AH and Qvar in order to save power consumption, 00h must be written in register 5Fh when the device is
powered on. AH2/QVAR2 (pin 5) and AH1/QVAR1 (pin 7) must be connected to GND.
Table 5. Electrical parameters of Qvar (@Vdd = 1.8 V, T = 25 °C)
Parameter
Typ.
Unit
Offset (shorted inputs)
0.02
mV
Noise (shorted inputs)
0.2
μV
Qvar gain
438k
LSB/mV
CMRR
64
dB
Input impedance
18(1)
MΩ
Input range
±18
mV
1. Depending on ODR and AVG, refer to Table 6
Table 6. Input impedance of Qvar
Input impedance [MΩ]
RIN (ODR, AVG) [MΩ]
ODR [Hz]
AVG
1
4
10
25
50
75
100
200
4
21.6
21.5
21.4
21.1
20.5
20.0
19.6
17.9
8
21.6
21.4
21.2
20.5
19.6
18.7
17.9
15.3
16
21.5
21.2
20.7
19.6
17.9
16.5
15.3
11.8
32
21.4
20.9
19.9
17.9
15.3
13.3
11.8
8.1
64
21.2
20.3
18.5
15.3
11.8
9.6
8.1
5.0
128
20.9
19.1
16.2
11.8
8.1
6.2
5.0
2.8
512
19.1
14.1
9.3
5.0
2.8
2.0
1.5
0.8
ILPS22QS
Electrical characteristics
DS13431 - Rev 3
page 7/57



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