Features

Applications

MODULE

PSD signal processing circuit

Digital output for connection with PC

C9068, C9069

PRELIMINARY DATA

Aug. 2002

C9068 (for one-dimensional PSD) and C9069 (for pin-cushion type two-dimensional PSD) are DC signal processing circuits specifically

designed for position measurement using PSD. Digital output allows direct connection with a personal computer through a serial (RS-232C)

interface. C9068 and C9069 are capable of detecting accurate positions of a spot light regardless of light intensity.

A D/A conversion signal is also output for monitoring, and when a voltmeter is connected to this D/A conversion output, the output voltage value

directly represents position data. (Output voltage represents the distance from the center of PSD. 1 V=1 mm)

l Digital output

l Serial (RS-232C) connection with PC

l D/A conversion signal output for monitoring

l Easy handling due to single +12 V supply operation

l No complicated adjustment required

l Displacement measurement using PSD

l Testing using PSD

l PSD performance evaluation

1

s Absolute maximum ratings

Parameter

Symbol

Value

Unit

Supply voltage

Vcc Max.

+18

V

Topr

0 to +40

°C

Tstg

-10 to +60

°C

*1: No condensation

s Electrical and optical characteristics (Ta=25

°C, Vcc=+12 V)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Conversion impedance

Tz

-

-V/A

Feedback capacitance

Cf

-

100

-

pF

C9068

A

C9069

A

Tr

5

-

-

ms

Digital output format

-

C onform s to R S -232C (position signal, light level m onitor output) 12-bit

-

D/A conversion output amplitude

Vo

-10

-

+10

V

Supply voltage

Vcc

+9

+12

+18

V

Current consumption

Icc

-

200

-

mA

*2: Photocurrent Isc (total input signals) from PSD mounted on the C9068 or C9069 circuit board.

*3: Output response time versus spot light position change.

s

s

s

s Combination with PSD

The following PSDs can be used by soldering the PSD leads to the through-hole terminals on the circuit board.

NOTE) PSDs sold separately.

Compatible PSD

PSD

signal processing circuit

Type

Type No.

C9068

One-dimensional PSD

C9069

*4: These PSDs cannot be directly mounted on the circuit board. Connect to the through-hole terminals at the edge of the circuit

board by external wiring.

*5: An attachment board should be used.