BH1771GLC-E2 Rohm Semiconductor, BH1771GLC-E2 Datasheet

BH1771GLC-E2

Manufacturer Part Number

BH1771GLC-E2

Description

IC PROX SENSOR AMBIENT LT 10WLGA

Manufacturer

Rohm Semiconductor

Datasheet

1.BH1771GLC-E2.pdf (1 pages)

Specifications of BH1771GLC-E2

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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Company:

BOSTOCK HK LIMITED

Part Number:

BH1771GLC-E2

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ROHM

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BH1771GLC

The BH1771GLC incorporates a proximity sensor with 3ch infrared LED

driver and an ambient light sensor in a compact package measuring only

2.8mm×2.8mm. Connect 3 infrared LEDs in order to detect both motion and

brightness. Ideal for compact portable LCD-equipped devices such as

mobile phones and digital cameras.

Monolithic Optical Proximity/Ambient Light Sensor

Features

Proximity Sensor

• Comparator/I

• Digital 8bit output

• Integrated IrLED current driver

• Built-in sunlight-cancelling circuit

Ambient Light Sensor

• Digital 16bit output

• Sensitivity variation: ±15%

Touchless Motion Operating Principle

Horizontal Detection

The industry’s first touchless motion function

Vertical Detection

C output

Output waveforms when moving

an object (i.e. hand) up and down

Output waveforms when moving

an object (i.e. hand) right to left

Time (s)

Dimensions

The IR LEDs are illuminated in a time-division-

based method to detect motion

Ambient light sensor and proximity sensor

with touchless motion function

Product Outline

The

The proximity sensor can detect objects 1cm to 10cm away, making touchless motion possible. Simply wave an

object, such as a hand, above the sensor to initiate various operations (e.g. scroll). The ALS features a wide

detection range, from darkness to direct sunlight, allowing adjustment of the brightness of the LCD and keypad

in mobile phones and portable devices to match ambient conditions for optimum visibility with minimal power

consumption.

Bottom View

10ms to 2000ms (variable)

Proximity Sensor

IrLEDs

1ms

BH1771GLC integrates an optical proximity sensor and digital ambient light sensor (ALS) on a single chip.

The content specified in this document is correct as of 30th September, 2009.

Top View

Unit: mm

Catalog No. 52F6230E 2009.09 ROHM ©

The internal proximity sensor utilizes a 3ch LED driver designed to drive 3 infrared

LED s situated near the sensor. The phase differenc e of the reflecte d light

(time-divided pulses) from each LED is then detected to determine the direction of

movement of the reflecting object (i.e. human hand).This makes touchless operation

possible - in a compact form factor.

BH1771GLC Block Diagram

Optical Detection

Mechanism

Ambient Light Sensor + Proximity Sensor

Single-chip design contributes to device

miniaturization

Visible

Light

Ambient Light

Reflector

Optional

LED 2

VDD LED

Target Object

Infrared

Light

Optional

(850/950nm)

LED 1

VDD LED

LED 3

VDD LED

IrLED

ILED 3

ILED 2

ILED 1

GND_LED

Rejection

DC Light

Amp

IrLED

Driver

Amp

Timing Controller

Linear

ADC

Pulse

Gen.

16bit

LED

ADC

GND

Brightness Sensor

Proximity Sensor

Linear/Log

Converter

Control

Logic

VDD

Logic

ALS

OSC

New Product Bulletin

GND

Registers

Data

Interface

POR

SC L

SD A

INT

(PS_OUT)

VDD IO

MCU

IrLED: ROHM’s

SIM-030

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