Features
l No complicated adjustments required
Position can be measured just by installing a 1-D PSD on
the board.
l Accurate position sensing
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.
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
P S D
Signal processing circuit for 1-D PSD
Circuit board for easier 1-D PSD operation
C5923
s A bsolute m axim um ratings
P aram eter
S ym bol
V alue
U nit
S upply voltage
V cc M ax.
18
V
Input sig nal current
I
IN
M ax.
V cc M ax. 10
-5
A
O utput short-circuit tim e
-
C on tinuou s
s
S ig nal
proc essor
O perating tem perature
T opr
0 to +50
C
T ransistor collector-em itter voltage
V
C E
+30
V
T ransistor collector current *
1
Ic
800
m A
LE D
driver
T ransistor collector dissipation *
1
P c
600
m W
s R ecom m ended operating range
P aram eter
S ym bol
C on dition
M in.
T yp.
M ax.
U nit
S upply voltage
V cc
14.5
15
15.5
V
s S pecifications / charac teristics (Ta= 25
C, Vcc=15 V)
P aram eter
S ym bol
C on dition
M in.
T yp.
M ax.
U nit
H ead am p con version im p edance *
2
R f
F acto ry setup prio r to ship pin g
0.95 10
5
1 10
5
1.05 10
5
V /A
F eedb ack capacitance *
2
C f
F acto ry setup prio r to ship pin g
21
22
23
pF
Input sig nal current *
3
I
IN
P hotoc urre nt w ith P S D ins talle d
1 10
-5
-
1 10
-4
A
R ise tim e (o utp ut 10 to 90 % )
tr
O utput respon se tim e
versus m ovem ent of ligh t
sp ot position, m easured
w ith P S D installed.
30
-
-
s
P SD reverse voltage
V
R
F acto ry setup prio r to ship pin g
0
5
14
V
O utput offset voltag e
Vos
*
5
-10
-
+10
m V
O utput voltage am plitude *
4
V o
W ith P SD installed and
light spot falling on ed ge
of active area.
-10
-
+10
V
O utput noise (analog divider)
V n
A ll rang e *
5
5
10
50
m Vp-p
S ig nal
proc essor
C urrent consum ption
Icc
*
5
-
45
-
m A
T ransistor collector current
Ic
*
1
-
170
-
m Ap-p
R ep etition frequency
f
T
*
1
-
3333
-
H z
LE D
driver
O utput m ethod
-
-
O pen collector
-
*1: D uty ratio: 3/10, pulse w idth: 90 s, LED: L1915 -01 (m ade by H am am atsu ; sold separately)
*2: T hese resisto rs are lead types a nd inserted into so ckets, so it can be ea sily to excha nge by the user if necessary in
a range betw een 1 10
4
to 1 10
6
. For m ore details, see the instruction m anual that com es with the product.
*3: P SD does not op erate correctly if th e inp ut signal current is outside the specified rang e.
*4: M axim um output am plitu de can be adjusted in a range of 2 to 10 V according to PS D type to be used.
*5: W ith no P SD in stalled and L ED turned off; pulsed curren t of 20 A (X 1=X2 ) is supplied to the circuit as current
signal (d uty ratio: 3/10, pulse w idth: 9 0 s) that substitutes for P SD photocurrent
1
Signal processing circuit for 1-D PSD
C5923
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: (81) 053-434-3311, Fax: (81) 053-434-5184, 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: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658
France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Smidesvgen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. 2003 Hamamatsu Photonics K.K.
Cat. No. KPSD1011E03
Apr. 2003 DN
s Dimensional outline (unit: mm, tolerance: 0.2 mm)
KACCA0054EB
q
D-sub connector
T erm inal No. Name
Content
1
V
REF
R eference voltage m onitor output
2
VR
PSD bias voltage monitor output
3
Vo
Divider output
(position-converted voltage)
4
K
C onnection to LED or other cathode
5
A
C onnection to LED or other anode
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
Subtracted signal output after S/H *
14
V6
Sum m ed signal output after S/H *
15
G
GND
* S/H: sample hold
q
Through holes for externally connected PSD
T erm inal No. Name
Content
1
IN1
Input from PSD output 1
2
G
GND
3
VR
Bias voltage output for
connection to PSD cathode
4
G
GND
5
IN2
Input from PSD output 2
s PSD and output voltage
Measurement conditions
1. Light source: LED (
p=900 nm)
2. Light spot:
200 m
3. PSD: S1352 (L=34 mm)
4. PSD photocurrent: 10 A
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 m (calculated value)
s Accessories
Connector HDAB-15S (HIROSE: For connections to power
supply and output readout device)
KACCB0040EB
KPSDC0062EA
KACCC0071EA
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.
102
15.5 MAX.
D-SUB CONNECTOR
(Hirose Electric: RDAB-15P)
37.5
110
THROUGH HOLES FOR
EXTERNALLY CONNECTED PSD
12.5
37.5
67
75
PSD
INSTALLTION
POSITION
(4
) 3.2
1
2
4
5
3
L
L/2
L/4
-L/4
-L/2
S1352, S3270
-L
-L/2
L/2
OUTPUT Vo (V)
LIGHT SPOT POSITION X (mm)
S3931, S3932
S3979
X
CENTER OF PSD ACTIVE AREA
LIGHT SPOT
PHOTOSENSITIVE
SURFACE
L
-
2
L
+
2
C5923
LED (LD) ANODE (+)
D-SUB CONNECTOR
LED (LD) CATHODE ()
VOLTMETER
CONSTANT
VOLTAGE
POWER
SUPPLY
+15 V
15 V
GND
+
G
+
PSD
X1
C
X2
1
5
6
7
8
3
4
5
s Operating example
2
s Input/output terminals
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