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ISL29147

更新时间： 2022-10-12 15:26:58

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
15页	711K
描述
Low Power Ambient Light and Proximity Sensor with Enhanced Infrared Rejection

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ISL29147 数据手册

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ISL29147

FN8409

Rev 3.00

January 6, 2015

Low Power Ambient Light and Proximity Sensor with Enhanced Infrared Rejection

The ISL29147 is a low power Ambient Light Sensor (ALS) and

Features

proximity (PROX) sensor. It has a built-in IR-LED for the

proximity function. The ALS function measures the amount of

light (in the visible spectrum) incident on the ISL29147.

• Internal IR-LED and sensor for a complete solution

• Ideal for applications under dark or tinted glass

The ALS function has a programmable ambient IR-rejection,

which allows fine tuning of light source variations and is ideal

for light sensor applications under dark protective glass. The

ALS provides a 12-bit measurement. A passive optical filter

removes unwanted wavelengths (IR or Ultraviolet) to ensure

accurate ALS measurement.

• Enhanced ambient sunlight rejection to 40k Lux

• Programmable proximity sleep time between proximity

measurements optimizes power consumption

• Hardware interrupt - no polling required

• Programmable IR compensation to fine-tune ALS

performance for various glass compositions

The proximity function includes a new offset adjustment to

compensate for the IR light reflected off the inside of the

protective glass cover and back to the ISL29147 sensor. This

offset adjustment allows the sensor to compensate for these

internal reflections and preserve the dynamic range of the

proximity measurement.

• Programmable IR LED drive current to 250mA

• Operates from 2.25V to 3.63V V

• Power-down I

DD,

typical 0.2µA

• Tiny 2.40x4x1.2 (mm) optical co-package

The built-in current-driver pulses an external infrared LED at a

programmed current for 90µs. The infrared light that is

reflected and received by the ISL29147 is digitized by an 8-bit

ADC. The proximity sensor also has a passive optical filter

designed to pass IR and reject visible wavelengths.

Applications

• Display dimming and adjustment

- Mobile devices: smart phones, PDA, GPS

- Computing: monitors, laptops, notebooks

- Picture frames, tablet-PCs, LCD-TV

The ISL29147 provides a hardware pin to indicate an interrupt

event. The interrupt pin saves power as the host microcontroller

can ‘wake-up’ on an interrupt event and does not need to poll

the device for an interrupt event. The interrupt generator is

user configurable and provides several options for ALS and

PROX trigger configurations. The ISL29147 supports an SMBus

• Object detection

- Touchscreen disabling

- Smart power-saving

compatible I C interface for configuration and control.

250

VDD_PULLUP

SCL, SDA and

INT PULLUPs

IRDR 250mA

SMBus MASTER

SCL

200

VDD

SCL

GND

LED+

SDA

INT

C₂

1µF

150

INT

100Ω

IRDR

LED-

IRDR 125mA

C₁

1µF

100

ISL29147

R : 100Ω 5% RESISTOR

C , C : 1µF CERAMIC 10V CAPACITOR

150

100

DISTANCE (mm)

FIGURE 1. TYPICAL APPLICATIONS CIRCUIT

FIGURE 2. PROXIMITY SENSITIVITY

FN8409 Rev 3.00

January 6, 2015

Page 1 of 15

12 3 4 5 6 7...15

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与ISL29147相关器件

型号	品牌	描述	获取价格	数据表
ISL29147IR0MZ-T7	RENESAS	SPECIALTY ANALOG CIRCUIT, PDSO8, 2.40 X 4 MM, 1.20 MM HEIGHT, ROHS COMPLIANT, PLASTIC, ODF	获取价格
ISL29147IROMZ-EVALZ	INTERSIL	Low Power Ambient Light and Proximity Sensor with Enhanced Infrared Rejection	获取价格
ISL29147IROMZ-EVALZ	RENESAS	Low Power Ambient Light and Proximity Sensor with Enhanced Infrared Rejection	获取价格
ISL29147IROMZ-T7	INTERSIL	Low Power Ambient Light and Proximity Sensor with Enhanced Infrared Rejection	获取价格
ISL29147IROMZ-T7	RENESAS	Low Power Ambient Light and Proximity Sensor with Enhanced Infrared Rejection	获取价格
ISL29501	INTERSIL	Auto gain control mechanism	获取价格

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