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ILPS28QSW 数据表(PDF) 7 Page - STMicroelectronics

部件名 ILPS28QSW
功能描述  Dual full-scale, 1260 hPa and 4060 hPa, absolute digital output barometer with Qvar detection in a water-resistant package
PDF  52 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ILPS28QSW 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
Symbol
Parameter
Test condition
Min. Typ.(1) Max. Unit
VDD
Supply voltage
1.7
3.6
V
Idd
Supply current for pressure acquisition
@ 1 Hz one-shot
AVG = 4 when AH and Qvar are disabled(2)
AVG = 4 when AH and Qvar are enabled
1.7
4.2
µA
@ 1 Hz one-shot
AVG = 128 when AH and Qvar are disabled(2)
AVG = 128 when AH and Qvar are enabled
9.4
11.9
IddPdn
Power-down current when AH and Qvar
are disabled(2)
Power-down current when AH and Qvar
are enabled
1
3.6
µA
1. Typical specifications are not guaranteed.
2. To use only the pressure sensor without Qvar, 00h must be written in register 5Fh when the device is powered on. AH1/
QVAR1(pin 2) and AH2/QVAR2 (pin 4) must be connected to GND.
Table 5. Electrical parameters of Qvar (@Vdd = 1.8 V, T = 25 °C)
Parameter
Typ.
Unit
Offset (shorted inputs)
±0.021
mV
Noise (shorted inputs)
9
μV
Qvar gain
426k
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
ILPS28QSW
Electrical characteristics
DS13905 - Rev 1
page 7/52



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