SI1142 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

SI1142

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

Small Infrared Photodi-

ode Response

Sunlight

ALS_IR_ADC_GAIN = 0

IR_RANGE = 0

— 2.44

—

ADC

counts/lux

2500K incandescent bulb

ALS_IR_ADC_GAIN = 0

IR_RANGE = 0

— 8.46

—

ADC

counts/lux

“Cool white” fluorescent

ALS_IR_ADC_GAIN = 0

IR_RANGE = 0

— 0.71

—

ADC

counts/lux

Infrared LED (875 nm)

ALS_IR_ADC_GAIN = 0

IR_RANGE = 0

— 452.38 —

ADC

counts.m2/

W

Large Infrared Photodi-

ode Response

Sunlight

PS_ADC_GAIN = 0

PS_RANGE = 0

PS_ADC_MODE = 0

— 14.07

—

ADC

counts/lux

2500K incandescent bulb

PS_ADC_GAIN = 0

PS_RANGE = 0

PS_ADC_MODE = 0

— 50.47

—

ADC

counts/lux

“Cool white” fluorescent

PS_ADC_GAIN = 0

PS_RANGE = 0

PS_ADC_MODE = 0

— 3.97

—

ADC

counts/lux

Infrared LED (875 nm)

PS_ADC_GAIN = 0

PS_RANGE = 0

PS_ADC_MODE = 0

— 2734

—

ADC

counts.m2/

W

Visible Photodiode

Noise

All gain settings

—

7

—

ADC

counts

RMS

Small Infrared Photodi-

ode Noise

All gain settings

—

1

—

ADC

counts

RMS

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.

Rev. 1.4

7

Share Link: