Features
l No complicated adjustments required
Position can be measured just by installing a 1-D PSD on
the board.
l Accurate position sensing
Position data of light spot is independent of light intensity.
l Compact design
Head amp, signal addition/subtraction circuits, and analog
divider circuit are mounted on a compact PC board.
Applications
l Displacement measurements using DC light
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
C3683-01
s Absolute maximum ratings
Parameter
Symbol
Value
Unit
Supply voltage
Vcc Max.
±18
V
Input signal current
I
IN
Max.
Vcc Max.
×
10
-5
A
Output short-circuit time
-
Continuous
s
Operating temperature
Topr
0 to +50
°C
s Recommended operating range
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Supply voltage
Vcc
±14.5
±15
±15.5
V
s Specifications / Characteristics (Ta=25 °C, Vcc=±15 V)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Head amp conversion impedance *
1
Rf
Factor y setup prior to ship ping
0.95 ×
10
5
1 ×
10
5
1.05 ×
10
5
V/A
Feedback capacitance
Cf
Factor y setup prior to ship ping
950
1000
1050
pF
Input signal current *
2
I
IN
Photocurrent with PSD
installed
1 ×
10
-5
-
1 ×
10
-4
A
Rise time (output 10 to 90 %)
tr
O utput res pons e tim e
vers us m ovem ent of light
spot pos ition, m eas ured
w ith P SD installed.
300
-
-
µs
PSD reverse voltage
V
R
Factor y setup prior to ship ping
0
+5
+14
V
Output offset voltage
Vos
*
3
-10
-
+10
mV
Output voltage amplitude
Vo
With PSD installed and
light spot falling on edge
of active area.
-10
-
+10
V
Output noise (analog divider)
Vn
All range *
3
-
25
-
mVp-p
Current consumption
Icc
*
3
-
±15
-
mA
*1: These resistors are lead types and inserted into sockets, so it can be easily to exchange by the user if necessary in a range
between 1 ×
10
4
to 1 ×
10
6
.
For more details, see the instruction manual that comes with the product.
*2: PSD does not operate correctly if the input signal current is outside the specified range.
*3: With no PSD installed, 20 µA (X1=X2) is supplied to the circuit as current signal that substitutes for PSD photocurrent
1
Signal processing circuit for 1-D PSD
C3683-01
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: Smidesvägen 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. KPSD1004E03
Apr. 2003 DN
X
CENTER OF PSD ACTIVE AREA
LIGHT SPOT
PHOTOSENSITIVE
SURFACE
L
-
2
L
+
2
50
11.5
15.5 MAX.
28
56
60
66
28
THROUGH HOLES FOR
EXTERNALLY CONNECTED PSD
PSD INSTALLTION
POSITION
D-SUB CONNECTOR
(Hirose Electric: RDEB-9P)
(4×) 3.2
5 4
2 1
3
C3683-01
5
1
PSD
X1
C
X2
4
5
3
+15 V
GND
-15 V
Vo
GND
CONSTANT
VOLTAGE
POWER
SUPPLY
VOLTMETER
2
5
-10
+10
OUTPUT Vo (V)
0
L
--
2
L
+-
2
LIGHT SPOT POSITION X (mm)
s Dimensional outline (unit: mm, tolerance: ±0.2 mm)
s PSD and output voltage
q D-sub connector
Term in al N o.
Name
Content
1
V
R
PSD bias voltage m onitor output
2
Vo
Divider output
(position-converted voltage)
3
-V
-15 V input
4
+V
+15 V input
5
G
GND
6
V
B
Subtracted signal output
7
V
2
Head amp output 2
8
V
1
Head amp output 1
9
V
A
Summed signal output
q Through holes for externally connected PSD
Term in al N o.
Name
Content
1
IN
1
Input from PSD output 1
2
G
GND
3
V
R
Bias voltage output for
connection to PSD cathode
4
G
GND
5
IN
2
Input from PSD output 2
KACCA0035EC
KACCC0040EA
KACCC0039EA
s Operating example
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.
KPSDC0062EA
Measurement conditions
1. Light source: LED (
p=900 nm)
2. Light spot:
200 µm
3. PSD: S1352 (L=34 mm)
4. PSD photocurrent: 10 µA
5. Voltmeter: 195A (KEITHLEY)
6. Frequency bandwidth: 10 Hz
7. Constant voltage power supply: ±15 V, power supply capacity:
0.1 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. 0.3 µm (calculated value)
s Accessories
· Connector HDEB-9S (Hirose Electric: For connections to power
supply and output readout device)
2
s Input/output terminals
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