Reflective Photosensors (Photo Reflectors)

1

Publication date: April 2004

SHG00052BED

Reflective photosensor

Non-contact point SW, object sensing

■ Overview

CNZ2152 is a photosensor detecting the change of reflective light

in which a high efficiency GaAs infrared light emitting diode is used

as the light emitting element, and a high sensitivity Si phototransistor

is used as the light detecting element. The two elements are located

parallel in the same direction and objects are detected when passing

in front of the device.

■ Features

• Fast response

• High sensitivity

• High SN ratio

■ Applications

• Detection of paper, film and cloth • Optical mark reading

• Detection of coin and bill

• Detection of position and edge

• Start, end mark detection of magnetic tape

■ Absolute Maximum Ratings T

Unit: mm

Parameter

Symbol

Rating

Unit

Input (Light

Reverse voltage

3V

emitting diode) Forward current

100

mA

1

150

mW

Output (Photo Collector-emitter voltage

20

V

transistor)

(Base open)

Emitter-collector voltage

3V

(Base open)

Collector current

30

mA

2

150

mW

Temperature

Operating ambient temperature

−25 to +85

°C

Storage temperature

−30 to +100

°C

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input

Forward voltage

1.25

1.50

V

characteristics Reverse current

10

µA

Output

Collector-emitter cutoff current

= 10 V

0.05

2.00

µA

characteristics (Base open)

Transfer

1

2

0.8

3.0

mA

characteristics

3

500

µA

0.6

V

Rise time

8

µs

Fall time

8

µs

*2: White paper (reflective ratio 90%)

*3: Tracing paper (paper SM-1 for 2nd original paper)

R

L

I

F

I

C

V

CC

d

= 5 mm

Test Paper

(Note) ( ) Dimension is reference

(10.0)

(2.54)

4-

φ0.45

φ0.9

+0.1

-0.2

+0.1

-0.2

14.0

Mark for

indicating

LED side

φ1.5

2

3

1

4

1: Cathode

2: Anode

3: Emitter

4: Collector

PRSTR104-001 Package

■ Electrical-Optical Characteristics T

Note) 1. Input and output are handled electrically.

2. This product is not designed to withstand radiation

3. *1: Output current measurement circuit (Ambient light is shut off completely)

Note) The part number in the parenthesis shows conventional part number.

Note) *1: Input power derating ratio is

2.0 mW/

°C at T

a

≥ 25°C.

*2: Output power derating ratio is

2.0 mW/

°C at T

a

≥ 25°C.