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SI1143 Scheda tecnica(PDF) 5 Page - Silicon Laboratories

Il numero della parte SI1143
Spiegazioni elettronici  PROXIMITY/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE
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Produttore elettronici  SILABS [Silicon Laboratories]
Homepage  http://www.silabs.com
Logo SILABS - Silicon Laboratories

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Si11 41/42/43
Preliminary Rev. 0.5
5
Table 3. Performance Characteristics1
Parameter
Symbol
Conditions
Min
Typ
Max
Units
IDD OFF Mode
Ioff
VDD < VDD_OFF (leakage from SCL,
SDA, and INT not included)
240
1000
nA
IDD Standby Mode
Isb
No ALS / PS Conversions
No I2C Activity
after t > TBD µs, VDD =1.8 V
150
500
nA
IDD Standby Mode
Isb
No ALS / PS Conversions
No I2C Activity
after t > TBD µs, VDD =3.3 V
—1.83
µA
IDD Actively Measuring
Iactive
Without LED influence, VDD = 3.3 V
4.3
5.2
mA
Peak IDD while LED1,
LED2, or LED3 is Actively
Driven
VDD =3.3 V
8
mA
LED1, LED2, LED3,
Saturation Voltage2
1.8< VDD<2.4, ILEDx<100 mA
1.8<VDD<2.4, ILEDx< 200 mA
2.4<VDD<3.6, ILEDx<200 mA
2.4<VDD<3.6, ILEDx<359 mA
0.3
0.5
0.3
0.5
V
LED1, LED2, LED3
Pulse Width
tPS
—25.6
30
µs
LED1, LED2, LED3
Leakage Current
VDD =3.3 V, VLEDx<3.0, no strobe
VDD = 3.3 V, 3.0<VLEDx< 5.0, no strobe
.01
1.0
5.0
5.0
µA
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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