SI1143-A11-GMR データシートの表示（PDF） - Silicon Laboratories

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SI1143-A11-GMR

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

LED1, LED2, LED3

ILEDx

VDD = 3.3 V, single drive

mA

Active Current

VLEDn = 1 V, PS_LEDn = 0001

3.5 5.6

7

VLEDn = 1 V, PS_LEDn = 0010

— 11.2

—

VLEDn = 1 V, PS_LEDn = 0011

13 22.4

29

VLEDn = 1 V, PS_LEDn = 0100

—

45

—

VLEDn = 1 V, PS_LEDn = 0101

—

67

—

VLEDn = 1 V, PS_LEDn = 0110

—

90

—

VLEDn = 1 V, PS_LEDn = 0111

— 112

—

VLEDn = 1 V, PS_LEDn = 1000

— 135

—

VLEDn = 1 V, PS_LEDn = 1001

— 157

—

VLEDn = 1 V, PS_LEDn = 1010

— 180

—

VLEDn = 1 V, PS_LEDn = 1011

— 202

—

VLEDn = 1 V, PS_LEDn = 1100

— 224

—

VLEDn = 1 V, PS_LEDn = 1101

— 269

—

VLEDn = 1 V, PS_LEDn = 1110

— 314

—

VLEDn = 1 V, PS_LEDn = 1111

— 359

—

Actively Measuring

Time4

Single PS

ALS VIS + ALS IR

Two ALS plus three PS

— 155

—

µs

— 285

—

µs

— 660

—

µs

Visible Photodiode

Response

Sunlight

ALS_VIS_ADC_GAIN = 0

VIS_RANGE = 0

— 0.282

—

ADC

counts/lux

2500K incandescent bulb

ALS_VIS_ADC_GAIN = 0

VIS_RANGE = 0

— 0.319

—

ADC

counts/lux

“Cool white” fluorescent

ALS_VIS_ADC_GAIN = 0

VIS_RANGE = 0

— 0.146

—

ADC

counts/lux

Infrared LED (875 nm)

ALS_VIS_ADC_GAIN = 0

VIS_RANGE = 0

— 8.277

—

ADC

counts.m2/

W

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.

6

Rev. 1.4

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