SM3320A

Optical Sensor IC

SEIKO NPC CORPORATION -

1

OVERVIEW

The IC can detect wider range of light wave from ultraviolet to infrared. The SM3320 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 SM3320A can be paralleled.

FEATURES

PACKAGE DIMENSIONS

▪ High-sensitivity preamplifier for ultraviolet to infrared detection using

(Unit: mm)

a single IC

▪ 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

 to 240M

▪ Photodiode detector size: 2.3mm×0.6mm

▪Anti-reflection film coating with little sensitivity changing by 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

SM3320A

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

SM3320A

IC1

SM3320A

IC2

SM3320A

IC3

ADC