s1880 s2044 kpsd1015e

PSD
Two-dimensional PSD
S1880, S2044
Non-discrete position sensor utilizing photodiode surface resistance
PSD (Position Sensitive Detector) is an optoelectronic position sensor utilizing photodiode surface resistance. Unlike discrete element detectors
such as CCD, PSD provides continuous position data and features high position resolution and high-speed response.
Features
Applications
l High position resolution
l Wide spectral response range
l High-speed response
l Simultaneous measurements of position and intensity
l Position is measured independent of light-spot size
l High reliability
l Optical position and angle sensing
l Remote optical control systems
l Automatic range finder systems
l Displacement and vibration monitors
l Laser beam alignment
l Medical equipment
■ General ratings / Absolute maximum ratings
Parameter
Package
Active area size
Reverse voltage
Operating temperature
Storage temperature
Symbol
VR Max.
Topr
Tstg
S1880
Ceramic
12 × 12
S2044
Metal
4.7 × 4.7
Unit
mm
V
°C
°C
20
-10 to +60
-20 to +80
■ Electrical and optical characteristics (Typ. Ta=25 °C, unless otherwise noted)
Parameter
Spectral response range
Symbol
λ
Peak sensitivity wavelength
Photo sensitivity
Interelectrode resistance *1
ZONE A
Position
detection error *2 ZONE B
λp
S
Rie
Saturation current
Ist
Dark current
Temp. coefficient of ID
Condition
Rise time
tr
Terminal capacitance
Ct
-
nm
5
-
S2044
Typ.
320 to
1060
920
0.6
10
±40
±70
15
±100
±150
nm
A/W
kΩ
-
-
-
0.5
-
mA
1.0
1.15
500
-
-
0.5
1.15
5
-
nA
times/°C
-
1.5
-
-
0.3
-
µs
-
300
-
-
45
-
pF
Max.
Min.
-
-
15
±150
±250
0.5
-
λ=λp
Vb=1 V
E
ID
TCID
5
-
S1880
Typ.
320 to
1060
920
0.6
10
±80
±150
Min.
VR=5 V
RL=1 kΩ
VR=5 V
VR=5 V
RL=1 kΩ
VR=5 V
f=10 kHz
Max.
Unit
µm
Position resolution *3
1.5
0.6
µm
*1: Measured between two output terminals opposite to each other, and the other terminals are open-circuited on measurement.
*2: The radius of Zones A and B depend on the product type. They are determined as follws:
Type No.
ZONE A (mm)
ZONE B (mm)
S1880
2.5
5
S2044
0.9
4 × 4 (quadrate)
ZONE A
ZONE B
ACTIVE AREA
KPSDC0063EA
1
Two-dimensional PSD
S1880, S2044
*3: Position resolution
This is the minimum detectable light spot displacement. The detection limit is indicated by distance on the photosensitive surface.
The numerical value of the resolution of a position sensor using a PSD is proporional to both the length of the PSD and the noise
of the measuring system (resolution deteriorates) and inversely proportional to the photocurrent (incident evergy) of the PSD
(resolution improves).
· Light source: LED (900 nm)
· Photocurrent: 1 µA
· Circuit system input noise: 1 µV (1 kHz)
· Spot Light size: φ200 µm
· Frequency range: 1 kHz
· Interelectrode resistance: Typical value (Refer to specification table.)
■ Spectral response
■ Photo sensitivity temperature characteristic
0.8
+2.0
TEMPERATURE COEFFICIENT (%/˚C)
QE=100 %
PHOTO SENSITIVITY (A/W)
0.7
0.6
0.5
0.4
QE=50 %
0.3
0.2
0.1
0
200
400
600
800
1000
1200
WAVELENGTH (nm)
■ Terminal capacitance vs. reverse voltage
(Typ. Ta=25 °C, f=10 kHz)
TERMINAL CAPACITANCE
1 nF
S1880
100 pF
S2044
10 pF
1 pF
0.1
1
10
100
REVERSE VOLTAGE (V)
KPSDB0074EB
2
+1.0
+0.5
0
-0.5
300
400
500
600
700
800
900 1000 1100
WAVELENGTH (nm)
KPSDB0013EB
10 nF
+1.5
KPSDB0015EB
Two-dimensional PSD
S1880, S2044
■ Example of position detectability (Ta=25 °C, λ=900 nm, spot light size: φ200 µm)
S1880
S2044
LINE INTERVAL: 0.5 mm
LINE INTERVAL: 1 mm
KPSDC0020EA
KPSDC0019EA
■ Example of DC-operating circuit
R1
Rf
+
+
+
VR
R9
R2
U1
Rf
+
R3
+
R5
R6
U3
Rf
R19
+
R14
R4
U2
Rf
R13
U5
R10
+
R7
+
R16
+
U4
Σ1
R24
R21
U10
+
+
U12
R22
∆X
Σ1
U11
R18
Y0
U13
R25
∆X
R17
U7
R12
∆Y
Σ1
U9
R20
R15
U6
R11
R8
+
∆Y
X0
U14
R23
U8
R1 - R25: same value
Rf: depends on input level
U1 - U4: low drift head amplifier, TL071, etc.
U13, U14: analog divider, AD538 (Analog Devices), etc.
KPSDC0026EB
■ Example of AC-operating circuit
C2
Rb
Rf
+
+
C3
VR
Rb
+
C4
Rb
+
U1
Rf
U2
Rf
R1
R2
R3
R4
+
R7
R8
U4
+
R5
R6
U3
Rf
R9
+
+
R13
U5
R10
U6
R11
R14
R15
R16
+
R17
U7
R12
+
R18
U8
∆Y
R19
+
U9
Σ1
R20
R21
U10
R22
∆X
∆Y
Σ1
U12
DC RESTORATION
C1
Rb
Y0
∆X
Σ1
U13
U11
R23
X0
P1
P2
DC RESTORATION
R1 - R24: same value
Rf: depends on input level
U1 - U4: low drift head amplifier, TL071, etc.
U12, U13: analog divider, AD538 (Analog Devices), etc.
∆ X, ∆ Y, Σ 1
0V
P1
P2
R1 R3
S/H A
S/H B
R2
P2 P1
R4
*R1 = R2 = R3 = R4
KPSDC0029EB
3
S1880, S2044
Two-dimensional PSD
■ Dimensional outlines (unit: mm)
S2044
S1880
5.7
14
Y
Y
X
5.7
14
X
(3 ×) R 0.2
ACTIVE AREA 4.7 × 4.7
15.6 ± 0.25
14.0 ± 0.2
4.2
1.8
0.5 MAX.
5.0 ± 0.2
PHOTOSENSITIVE
SURFACE
10.0
0.7 t GLASS
28.0 ± 0.3
1.25
PHOTOSENSITIVE
SURFACE
5.1 ± 0.3
ACTIVE AREA 12 × 12
5.08 5.08
9.0 9.0
0.75 LEAD
0.75 LEAD
5.08 5.08
ANODE (X2)
ANODE (Y2)
CATHODE (CASE)
ANODE (X1)
ANODE (Y1)
9.0 9.0
ANODE (Y2)
ANODE (X1)
ANODE (Y1)
ANODE (X2)
CATHODE (COMMON)
2.54
1.2 MAX.
KPSDA0012EC
KPSDA0013EB
■ Position conversion formula
■ Active area chart
(IX2 + IY1) - (IX1 + IY2) 2x
=
IX1 + IX2 + IY1 + IY2 LX
LX
Y2
LY
(IX2 + IY2) - (IX1 + IY1) 2y
=
IX1 + IX2 + IY1 + IY2 LY
X1
S1880: LX=14 mm
LY=14 mm
S2044: LX=5.7 mm
LY=5.7 mm
X2
y
x
ACTIVE AREA *
Y1
* Active area is specified at the inscribed square.
KPSDC0012EA
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. ©2007 Hamamatsu Photonics K.K.
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, 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.: 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
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
4
Cat. No. KPSD1015E06
Oct. 2007 DN