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SI1143 数据表(PDF) 6 Page - Silicon Laboratories

部件名 SI1143
功能描述  PROXIMITY/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE
Download  66 Pages
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制造商  SILABS [Silicon Laboratories]
网页  http://www.silabs.com
标志 SILABS - Silicon Laboratories

SI1143 数据表(HTML) 6 Page - Silicon Laboratories

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Si1141/42/43
6
Preliminary Rev. 0.5
LED1, LED2, LED3
Active Current
ILEDx
VDD = 3.3 V, single drive
VLEDn = 1 V, PS_LEDn = 0001
VLEDn = 1 V, PS_LEDn = 0010
VLEDn = 1 V, PS_LEDn = 0011
VLEDn = 1 V, PS_LEDn = 0100
VLEDn = 1 V, PS_LEDn = 0101
VLEDn = 1 V, PS_LEDn = 0110
VLEDn = 1 V, PS_LEDn = 0111
VLEDn = 1 V, PS_LEDn = 1000
VLEDn = 1 V, PS_LEDn = 1001
VLEDn = 1 V, PS_LEDn = 1010
VLEDn = 1 V, PS_LEDn = 1011
VLEDn = 1 V, PS_LEDn = 1100
VLEDn = 1 V, PS_LEDn = 1101
VLEDn = 1 V, PS_LEDn = 1110
VLEDn =1V, PS_LEDn =1111
5.6
11.2
22.4
45
67
90
112
135
157
180
202
224
269
314
359
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
mA
Actively Measuring Time3
Single PS
ALS VIS + ALS IR
Two ALS plus three PS
155
285
660
TBD
TBD
TBD
µs
µs
µs
PS Min Detectable
Reflectance Input4
EMIN
VDD =3.3 V
 = 850 nm
—0.1
1
µW/
cm2
PS Max Detectable
Reflectance Input
EMAX
VDD =3.3 V
 = 850 nm
25
mW/
cm2
ALS Range5
10m
128k
lx
ALS Flicker Noise Error
VDD =3.3 V
±5
%
SCL, SDA, INT Output
Low Voltage
VOL
I=4mA, VDD > 2.0 V
I=4 mA, VDD < 2.0 V
VDDx0.2
0.4
V
V
Table 3. Performance Characteristics1 (Continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Notes:
1. Unless specifically stated in "Conditions", electrical data assumes ambient light levels < 1 klx.
2. Proximity-detection performance may be degraded, especially when there is high optical crosstalk, if the LED supply
and voltage drop allow the driver to saturate and current regulation is lost.
3. Represents the time during which the device is drawing a current equal to Iactive for power estimation purposes.
Assumes default settings.
4. Applies to single 25.6 µs pulse measurement. By increasing irLED pulse width, 0.001 µW/cm2 under low light is
possible.
5. ALS Sensitivity under low light conditions can be improved by increasing ADC integration time. 10 mlx resolution
possible under the highest ADC integration time setting.


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