1

Quad Segment Photo Sensor IC

ISL58344

The ISL58344 photo sensor IC has a wide optical spectral

sensitivity from 400nm to 1000nm. It is good for multiple light

source applications, such as laser base projectors. The three sets

of gain registers can be used to adjust optical-to-electrical

conversion gain for each RED (R), GREEN (G), and BLUE (B) laser

or any wavelength in the spectral range for the application. The

ISL58344 is a single die device that has four identical photo

detectors arranged in segments that are optimized for laser

beam spot alignment. Quad segments can be used as a single

photo diode for optical power calibration and gamma correction.

The detectors can also be split into two sections with subtraction

signal output for laser beam position alignment. Beam detection

can also be used to compensate for MEMS scanning projector

geometric distortions and temperature distortions. Registers can

be updated in real time while device is in operation.

The ISL58344 can be put in sleep mode through serial interface,

where it consumes virtually no power. The ENA pin, when low, will

put the device in standby mode. Toggling the ENA pin Hi will turn

the device on quickly.

The ISL58344 operates from a single +3.3V supply. It is available

in a space-saving 9 pin glass top BGA package.

Related Literature

• See TB478 “PCB Assembly Guidelines for Shell-Op 3D Package”

Features

• Sensitive from 400nm to 1000nm with Patented Technology

for Improved Blue Photo Response

• Differential Voltage Output

• Internal Output Reference or External Output Reference

• Single +3.3V Power Supply

• Serial Interface for Gain Calibration

• Fast Settling Time <20ns

• Wide Signal Bandwidth >50MHz

• Wide Signal Gain Dynamic Range >25dB

• Sleep Mode for Conserving Power

• Quad PD Segments Provide Laser Beam Offset for Beam

Realignment Capability

• White Balance for LCoS and MEMS Systems

• Small 9-ball Optical Chip Scale Package (OCSP)

(2.2mmx2.2mm)

• Glass Top Package Compatible with Near UV and Blue LDs

• Intersil 3-wire SPI Interface

Applications

• Optical Power Monitoring

• Laser Based/LED Based Pico-Projectors

• Laser Based/LED Based projection TV

Get Full Datasheet

Horizontal

&

Vertical

Position

Detection

Horizontal

&

Vertical

Driver

Vertical

Horizontal

MEMS

Digital

Controller

H Pos

V Pos

MEMS H&V Driver

Power Converter

Laser Diode Driver

CLK

Power Converter

Digital Circuits

Pixel Data (RGB)

Video

Front End

&

Video

Processor

MCU

Raster Scan Image

OEIC

ISL58344

FIGURE 1. APPLICATION BLOCK DIAGRAM

March 11, 2011

FN7524.0

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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