HAMAMATSU C5923 Datasheet

PSD

g

g

Signal processing circuit for 1-D PSD

C5923

Circuit board for easier 1-D PSD operation

Features

l

No complicated adjustments required
Position can be measured just by installing a 1-D PSD on
the board.

l

Accurate position sensing

Applications

l

Displacement measurements using pulsed light synchronized
with the circuit

l

Various studies using 1-D PSD

l

Performance evaluation of 1-D PSD

Use of pulse-driven LED allows accurate position sensing
even under background light, and independent of pulsed
light intensity.

l

Compact design
An LED drive circuit, head amp, signal addition/subtraction
circuits, sample hold circuit, synchronization circuit and
analog divider circuit are mounted on a compact PC board.

Absolute maximum ratings

■

Supply voltage Vcc Max. ±18 V

Signal

processor

■

Supply voltage Vcc ±14.5 ±15 ±15.5 V

Input signal current IIN Max. Vcc Max. × 10
Output short-circuit time - Continuous s
Op erating tem perature Topr 0 to +50
Transistor c ollec tor-em itter v olta ge V

LED

Transistor collector current *

driver

Transistor collector dissipation *

Recommended operating range

Parameter Symbol Value Unit

-5

1

1

Parameter Symbol Condition Min. Typ. Max. Unit

CE

Ic 800 mA

Pc 600 mW

+30 V

A

C

°

Specifications / characteristics (Ta=25 °C, Vcc=±15 V)

■

Head amp conversion impedance *
Feedback capacitance *
Input signal current *

Rise time (outp ut 10 to 90 %) tr

Signal

processor

*1: Duty ratio: 3/10, pulse width: 90 µ s, LED: L1915-01 (made by Hamamatsu; sold separately)
*2: These resistors are lead types and inserted into sockets, so it can be easily to exchange by the user if necessary in

*3: PSD does not operate correctly if the input signal current is outside the specified range.
*4: Maximum output amplitude can be adjusted in a range of ±2 to ±10 V according to PSD type to be used.
*5: With no PSD installed and LED turned off; pulsed current of 20 µA (X1=X2) is supplied to the circuit as current

PSD reverse voltage V
Output offset voltage Vos *

Output voltage amplitude *

Output noise (analog divider) Vn All range *
Current consum ption Icc *
Transistor collector current Ic *

LED

Repetition frequency f

driver

Output method - - Open collector -

a range between 1 × 10

signal (duty ratio: 3/10, pulse width: 90 µs) that substitutes for PSD photocurrent

Parameter Symbol Condition Min. Typ. Max. Unit

2

3

4

4

to 1 × 106 Ω. For m ore details, see the instruction manual that com es with the product.

2

Rf

Factory setup prior to shippin

Cf

Factory setup prior to shippin

IN

I

Photocurrent with PSD installed
Output response time
versus movem ent of light
spot position, measured
with PSD installed.

R

Factory setup prior to shipping

5

W ith PSD installed a nd

Vo

light spot falling on edge
of active area.

5

1

1

T

*

5

0.95 × 1051 × 1051.05 × 105V/A
21 22 23 pF

-5

1 × 10

30 - - µs

0514V

-10 - +10 mV

-10 - +10 V

5 10 50 mVp-p

-±45-mA

- 170 - mAp-p

- 3333 - Hz

-1 × 10-4A

1

Signal processing circuit for 1-D PSD

X

CENTER OF PSD ACTIVE AREA

LIGHT SPOT

PHOTOSENSITIVE
SURFACE

L

­ 2

L
+
2

C5923

■ Dimensional outline (unit: mm, tolerance: ±0.2 mm)

37.5

12453

67

75

THROUGH HOLES FOR
EXTERNALLY CONNECTED PSD

12.5

PSD
INSTALLTION
POSITION

(4 ×) 3.2

15.5 MAX.

KACCA0054EB

110

102

37.5

D-SUB CONNECTOR
(Hirose Electric: RDAB-15P)

■ PSD and output voltage

OUTPUT Vo (V)

L

L/2

L/4

-L/2

L/2

-L/4

-L/2

S1352, S3270

-L
S3931, S3932

S3979

LIGHT SPOT POSITION X (mm)

S1352, S3931 and S3932 (PSD made by Hamamatsu) can be
directly mounted on the board. To mount other types of 1-D
PSDs, use through holes on the board.

■ Input/output terminals

D-sub connector

●

Term inal No.

Name Content

1V

REF

Reference voltage monitor output

2 VR PSD bias voltage monitor output

3Vo

4 K
5A

Divider output
(position-converted voltage)

Connection to LED or other cathode
Connection to LED or other anode

■ Operating example

PSD

X1

X2

1

C

C5923

5

+15 V

6

–15 V

7

GND

8
3
4
5

D-SUB CONNECTOR

6 +V +15 V input
7 -V -15 V input
8 G GND

9 V1 Head amp output 1
10 V2 Head amp output 2
11 V3 Subtracted signal pulse output
12 V4 Summed signal pulse output
13 V5
14 V6

Subtracted signal output after S/H *
Sum m ed signal output after S/H *

15 G GND

* S/H: sample hold

Through holes for externally connected PSD

●

Term inal No.

Name Content

1 IN1 Input from PSD output 1

2 G GND

3VR

Bias voltage output for

connection to PSD cathode
4 G GND
5 IN2 Input from PSD output 2

Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.

HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: [phone], Fax: [phone], http://www.hamamatsu.com

U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: [phone], Fax: [phone]
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: [phone], Fax: [phone]
France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: [phone], Fax: [phone]
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Her tfordshire AL7 1BW, United Kingdom, Telephone: [phone], Fax: [phone]
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: [phone], Fax: [phone]
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: [phone], Fax: [phone]

2

Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2003 Hamamatsu Photonics K.K.

Measurement conditions

1. Light source: LED (λp=900 nm)

2. Light spot: φ200 µm

3. PSD: S1352 (L=34 mm)

4. PSD photocurrent: 10 µA

5. Frequency bandwidth: 10 Hz

6. Voltmeter: 195A (KEITHLEY)

7. Constant voltage power supply: ±15 V, power supply capacity:

0.2 A or more, ripple voltage: 3 mVp-p or less

When measured under the above conditions, the following output
voltage amplitude and position resolution can be obtained.

· Output voltage amplitude: V

FS=±10 V

· Position resolution: ∆l=approx. 0.6 µm (calculated value)

■ Accessories

· Connector HDAB-15S (HIROSE: For connections to power
supply and output readout device)

CONSTANT

+

VOLTAGE

–

POWER

G

SUPPLY

+

VOLTMETER

–

LED (LD) CATHODE (–)

LED (LD) ANODE (+)

Cat. No. KPSD1011E03
Apr. 2003 DN

KACCB0040EB

KPSDC0062EA

KACCC0071EA