SM3322ARA

Optical Sensor IC

SEIKO NPC CORPORATION -

1

OVERVIEW

signal conditioning circuit. The IC has an optical filter on chip with target condition 640nm ± 60nm, and it integrates all the elements

required for optical sensor into an ultra-miniature package. The signal condition circuit has a programmable gain amplifier with dark

current compensation circuit, so that it can operate in wider temperature range. With 3 addressing bits, up to 8 SM3322ARA can be

paralleled.

FEATURES

PACKAGE DIMENSIONS

▪ Optical filter on chip with target condition: 640nm ± 60nm

(Unit: mm)

▪ Dark current compensation circuit built-in for stable signal output

▪ Gain setting and output control function using serial interface

(DATA, SE, CLK, OE)

▪ Connection up to 8 devices in parallel according to 3-bit address setting

▪ Transimpedance range: 500k

Ω to 240MΩ

▪ Photodiode detector size: 2.3mm×0.6mm

▪Anti-reflection film coating reduces responsivity fluctuations

due to wavelength

▪ Supply voltage range: 2.7 to 5.5V (single supply)

▪ Operating temperature range: -40 to +85°C

▪ Package: 12 pin HCOB

ORDERING INFORMATION

Device

Package

SM3322ARA

12 pin HCOB

TYPICAL APPLICATION CIRCUIT

Photodiode detector

A

B

X

Y

0.35

0.25

A

B

Photodiode detector dimensions(Origin:Package center)

XY

-1.15

1.15

-0.7

-0.1

Package type : 12pin HCOB

Package size : 3.2mm×5.5mm

Photodiode detector size : 2.3mm×0.6mm

0.5

±0.05

ADC

CPU

SM3322ARA

IC1

SM3322ARA

IC2

SM3322ARA

IC3

ADC