SI1143 View Datasheet(PDF) - Silicon Laboratories

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SI1143

PROXIMITY/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE

Silicon Laboratories 

Si1141/42/43

Table 2. Performance Characteristics1 (Continued)

Parameter

Symbol

Condition

Min Typ

Max

Unit

Large Infrared Photodi-

ode Noise

All gain settings

—

10

—

ADC

counts

RMS

Visible Photodiode Off-

set Drift

VIS_RANGE = 0

ALS_VIS_ADC_GAIN = 0

ALS_VIS_ADC_GAIN = 1

ALS_VIS_ADC_GAIN = 2

ALS_VIS_ADC_GAIN = 3

ALS_VIS_ADC_GAIN = 4

ALS_VIS_ADC_GAIN = 5

ALS_VIS_ADC_GAIN = 6

ALS_VIS_ADC_GAIN = 7

—

—

–0.3

–0.11

–0.06

–0.03

–0.01

–0.008

–0.007

–0.008

ADC

counts/°C

Small Infrared Photodi-

ode Offset Drift

IR_RANGE = 0

IR_GAIN = 0

IR_GAIN = 1

IR_GAIN = 2

IR_GAIN = 3

—

—

ADC

–0.3

counts/°C

–0.06

–0.03

–0.01

SCL, SDA, INT Output VOL

Low Voltage

Temperature Sensor

Offset

I = 4 mA, VDD > 2.0 V

I = 4 mA, VDD < 2.0 V

25 °C

—

— VDD x 0.2

V

—

—

0.4

V

— 11136

—

ADC

counts

Temperature Sensor

Gain

—

35

—

ADC

counts/°C

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. Guaranteed by design and characterization.

4. Represents the time during which the device is drawing a current equal to Iactive for power estimation purposes.

Assumes default settings.

8

Rev. 1.4

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