Signal processing circuit for 2-D PSD
C4674-01
Circuit board for easier 2-D PSD operation
The C4674-01 is a DC signal processing circuit for two-dimensional PSD. It is suitable for displacement measurements using
DC light.
Features Applications
No complicated adjustments required Displacement measurements using DC light
Position measurement of a light spot can be made Various studies using 2-D PSD
simply by mounting 2-D PSD.
Performance evaluation of 2-D PSD
Output voltage directly representing the position data
The position (mm) of a light spot from the PSD center
is obtained as an output voltage (V).
Accurate position sensing
Position data of light spot is independent of incident
light intensity.
Three sensitivity ranges
Compact design
Head amp, signal addition/subtraction circuits, and
analog divider circuit are mounted on a compact PC
board.
Absolute maximum ratings (Ta=25 °C unless otherwise noted)
Parameter Symbol Value Unit
Supply voltage Vs max ±18 V
Operating temperature*1 Topr 0 to +50 °C
Storage temperature*1 Tstg -10 to +60 °C
Input current Iin max 1 × 10-2 A
*1: No dew condensation
When there is a temperature difference between a product and the surrounding area in high humidity environment, dew condensation
may occur on the product surface. Dew condensation on the product may cause deterioration in characteristics and reliability.
Note: Exceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the prod-
uct within the absolute maximum ratings.
www.hamamatsu.com 1
Signal processing circuit for 2-D PSD C4674-01
Specifications (Ta=25 °C, Vs=±15 V)
Parameter Symbol Condition Min. Typ. Max. Unit
H range - 1 × 106 -
Conversion impedance Zt *2 M range - 1 × 105 - V/A
L range - 1 × 104 -
H range 1 × 10-6 - 1 × 10-5
Input photocurrent Ip *3 M range 1 × 10-5 - 1 × 10-4 A
L range 1 × 10-4 - 1 × 10-3
Lower - DC -
Y-direction head Cutoff frequency fc -3 dB kHz
amplifier differential Upper 12 16 -
output (V1), High VOH +13.5 +13.8 -
Output voltage V
X-direction head Low VOL - -13.8 -13.5
amplifier differential Output noise voltage Vn *5
- 2 - mVp-p
output (V2)
Output offset voltage Vos *5 -5 - +5 mV
Lower - DC -
Cutoff frequency fc -3 dB kHz
Upper 12 16 -
Incident light level High VOH +13.5 +13.8 -
monitor output Output voltage V
Low VOL - 0 -
(V3) 5
Output noise voltage Vn * - 2 - mVp-p
Output offset voltage Vos *5 -5 - +5 mV
Lower - DC -
Cutoff frequency fc -3 dB kHz
Y-direction position Upper 12 16 -
output (V4), Maximum output Factory setup
Vfs ±6.8 ±7 ±7.2 V
X-direction position amplitude voltage prior to shipping*6
output (V5) Output noise voltage Vn *5 - 5 - mVp-p
Output offset voltage Vos *5 -70 - +70 mV
Referance voltage Vref *6 +2 - +10 V
Factory setup
Reverse voltage for PSD VR +4.9 +5 +5.1 V
prior to shipping*7
Operating supply voltage Vs *8 ±14.5 ±15 ±15.5 V
Current consumption Is *5 - ±15 - mA
*2: Factory setup prior to shipping is M range. The range can be switched with the jumper on the board.
*3: Photocurrent Ip with PSD installed (total input signal). PSD does not operate correctly if the input signal current is outside the
specified range.
*4: Output response time 10 to 90%
*5: With no PSD installed. Current signal that substitutes for PSD photocurrent (L range: X1=X2=Y1=Y2=200 μA, M range:
X1=X2=Y1=Y2=20 μA, H range: X1=X2=Y1=Y2=2 μA) is input. When maximum output amplitude voltage Vfs=±7 V is set.
*6: Factory setup prior to shipping is 7 V. Adjustable with a volume resistor on the board according to the PSD type to be used.
*7: Factory setup prior to shipping is +5 V. The voltage can be adjusted in the range of 0 to +14 V with a variable resistor on the board.
*8: Switching power supplies are not supported. Use a series power supply (with 3 mVp-p or less ripple voltage).
Combination with a PSD
A PSD is installed (soldered) on the signal processing circuit.
Note: PSDs are sold separately.
Photosensitive Position reso-
Package Installation on Using dedicated External*10
Type no. area size lution*9
(mm) board board attachment
(mm) (μm)
S1880 12 × 12 5 Ceramic (28) ○ × ○
S2044 4.7 × 4.7 2 Metal (TO-8 14) ○ × ○
Ceramic chip carrier
S5990-01 4×4 1.7 × ○ ○
(8.8 × 10.6)
Ceramic chip carrier
S5991-01 9×9 3.8 × ○ ○
(14.5 × 16.5)
*9: Reference value. When maximum output amplitude voltage Vfs=±7 V is set.
*10: Wiring using shielded wires or AWG#26 or equivalent twisted pair wires (no longer than 30 cm) is recommended.
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Signal processing circuit for 2-D PSD C4674-01
PSD and output voltage
With the D-sub connector on top, the output corresponding to the horizontal position (converted output voltage of the X position) is
output from D-sub connector terminal No. 1 (V5), and the output corresponding to the vertical position (converted output voltage of
the Y position) is output from D-sub connector terminal No. 2 (V4).
D-sub connector Output V4 or V5 (V)
C4674-01
L/2
PSD
installation
-L/2 Light spot
position
0 L/2 X or Y (mm)
-L/2
Incident light Y
(light spot)
KACCC0648EA
+L/2
X
-L/2
PSD photosensitive area
L × L (mm2)
-L/2 +L/2
KACCC0650EA
Two-dimensional PSD
Parameter Symbol Unit
S1880 S2044 S5990-01 S5991-01
Photosensitive area length L 12 4.7 4 9 mm
V4 (X) ±6 ±2.35 ±2 ±4.5 V
Output voltage amplitude
V5 (Y) ±6 ±2.35 ±2 ±4.5 V
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Signal processing circuit for 2-D PSD C4674-01
Connection example
Measured light (DC light)
Two-dimensional PSD (sold separately) +15 V
GND
-15 V
Dual power supply (±15 V, 0.1 A or more)
Be sure to use a dual power supply.
Switching power supplies are not supported.
Use a series power supply (with 3 mVp-p or
less ripple voltage).
V5
GND
C4674-01
V4
GND
Voltmeter, oscilloscope, etc.
KACCC0652EB
Dimensional outline (unit: mm)
Through holes for
externally connected PSD
65 (7 ×) 1 (2.54 pitch) PSD installation position
3 59 1.6
S1880
3
1234567
17
C4674-01
MADE IN JAPAN
S2044
90
84
(4 ×) 3.2
(20)
(4 ×) C2
15.5 max.
D-sub connector Tolerance: ±0.2
(Hirose Electric: RDED-9P)
KACCA0304EA
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Signal processing circuit for 2-D PSD C4674-01
Pin connections
D-sub connector
Pin no. Name Content
1 V5 X position signal output
2 V4 Y position signal output
3 +V +15 V
4 -V -15 V
5 G GND
6 V3 Sum signal output (incident light level monitor output)
7 V2 X position head amp differential output
8 VR PSD reverse bias voltage monitor output
9 V1 Y position head amp differential output
Through holes for externally connected PSD
Pin no. Name Content
1 G GND (for signal cable shield)
2 Y2 Connection to PSD anode terminal “Y2”
3 X2 Connection to PSD anode terminal “X2”
PSD reverse bias voltage output: connection to PSD cathode
4 VR
terminal
5 Y1 Connection to PSD anode terminal “Y1”
6 X1 Connection to PSD anode terminal “X1”
7 G GND (for signal cable shield)
Accessories
∙ Instruction manual
∙ Connector HDEB-9S (Hirose Electric: for connections to power supply and output readout device)
∙ S5990-01/S5991-01 mounting board
Related information
www.hamamatsu.com/sp/ssd/doc_en.html
Precautions
∙ Disclaimer
Information described in this material is current as of August 2019.
Product specifications are subject to change without prior notice due to improvements or other reasons. This document has been carefully prepared and the
information contained is believed to be accurate. In rare cases, however, there may be inaccuracies such as text errors. Before using these products, always
contact us for the delivery specification sheet to check the latest specifications.
The product warranty is valid for one year after delivery and is limited to product repair or replacement for defects discovered and reported to us within that
one year period. However, even if within the warranty period we accept absolutely no liability for any loss caused by natural disasters or improper product use.
Copying or reprinting the contents described in this material in whole or in part is prohibited without our prior permission.
www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81)53-434-3311, Fax: (81)53-434-5184
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, Bridgewater, N.J. 08807, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218, E-mail: usa@hamamatsu.com
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-265-8, E-mail: info@hamamatsu.de
France: Hamamatsu Photonics France S.A.R.L.: 19, 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, E-mail: infos@hamamatsu.fr
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, E-mail: info@hamamatsu.co.uk
North Europe: Hamamatsu Photonics Norden AB: Torshamnsgatan 35 16440 Kista, Sweden, Telephone: (46)8-509 031 00, Fax: (46)8-509 031 01, E-mail: info@hamamatsu.se
Italy: Hamamatsu Photonics Italia S.r.l.: Strada della Moia, 1 int. 6, 20020 Arese (Milano), Italy, Telephone: (39)02-93 58 17 33, Fax: (39)02-93 58 17 41, E-mail: info@hamamatsu.it
China: Hamamatsu Photonics (China) Co., Ltd.: B1201, Jiaming Center, No.27 Dongsanhuan Beilu, Chaoyang District, 100020 Beijing, P.R.China, Telephone: (86)10-6586-6006, Fax: (86)10-6586-2866, E-mail: hpc@hamamatsu.com.cn
Taiwan: Hamamatsu Photonics Taiwan Co., Ltd.: 8F-3, No. 158, Section2, Gongdao 5th Road, East District, Hsinchu, 300, Taiwan R.O.C. Telephone: (886)3-659-0080, Fax: (886)3-659-0081, E-mail: info@hamamatsu.com.tw
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Cat. No. KPSD1005E11 Aug. 2019 DN
