Datasheet - Hamamatsu Photonics

PSD
One-dimensional PSD
S3931, S3932, S3270
6 to 37 mm resistance length PSD for precision distance measurement
Hamamatsu provides various types of one-dimensional PSD (Position Sensitive Detector) designed for precision distance measurement such as
displacement meters.
S3931 and S3932 have an active area of 1 × 6 mm and 1 × 12 mm respectively, and are mounted on a compact ceramic package with a
transparent resin window. Variant types (S3931-01, S3932-01) with a visible-cut resin window are also available.
S3270 offers an active area longer than 30 mm, allowing position detection at a long distance. S3270 has a visible-cut resin window, and S327001 with a transparent resin window is also available.
Features
Applications
l Superior position detection ability
l Displacement sensing
l High reliability
l Distance measurement
l S3931, S3932: Easy to use 4-pin small ceramic package l Proximity switching
l Long and narrow active area
S3270: 1 × 37 mm
■ General ratings / Absolute maximum ratings
Type No.
S3931
S3932
S3270 *2
Package
Window
material *1
Ceramic
R
R
R (B)
Active area
size
(mm)
1×6
1 × 12
1 × 37
Absolute maximum ratings
Reverse voltage O peratin g tem perature Storage temperature
VR Max.
Topr
Tstg
(V)
(°C)
(°C)
20
-10 to +60
-20 to +80
-10 to +75
■ Electrical and optical characteristics (Typ. Ta=25 °C, unless otherwise noted)
P ositio n
Tem p.
Term inal
Saturation Dark
R ise tim e
Interelectrode
detection error * 3
coefficient
capacitance Position
4
photocurrent * current
tr
resistance
of
E
Ct
resolution
VR=5 V
Rie
VR=5 V
ID
Type No.
ID
*5
VR=5 V
VR=5 V
R L =1 kΩ VR=5 V
R L =1 kΩ
Vb=0.1 V
light spot φ200 µm
f=10 kH z
TCID
Typ. M ax.
Min. Typ. Max. Typ. Max.
(µA) (nA) (nA) (tim es/°C ) (µs)
(pF)
(nm)
(nm) (A/W) (kΩ) (kΩ) (kΩ) (µm) (µm)
(µm)
S3931
±30 ±120
0.15 10
1.5
40
0.2
320 to 1100 920
0.55 30 50 80
100
S3932
±60 ±240
0.2 20 1.15
3.0
80
0.3
700 to 1100 960
S3270
0.55 10 15 20 ±100 ±400
300
0.5 20
1.0
100
2.8
*1: R: clear resin coating, R (B): visible-cut resin coating.
*2: Works with microscopic spot light detection.
*3: A range of 75 % of that from the center of the photosensitive surface to the edge.
*4: The upper limit of linearity of photocurrent in response to the quantity of light is defined as the point where the linearity
deviates by 10 %.
*5: Position resolution
This is the minimum detectable light spot displacement. The detection limit is indicated by the distance on the photosensitive
surface. The numerical value of the resolution of a position sensor using a PSD is proportional to both the length of the PSD
and the noise of the measuring system (resolution deteriorates) and inversely proportional to the photocurrent (incident
energy) of the PSD (resolution improves).
Light source: LED (900 nm)
Photocurrent: 1 µA
Spot light size: φ 200 µm
Circuit system input noise: 1 µV (1 kHz)
Frequency range: 1 kHz
Interelectrode resistance: Typical value (refer to the specification table)
S p ectral
Peak
Photo
response sensitivity sensitivity
range wavelength
S
λ
λp
λ=λp
1
One-dimensional PSD
■ Spectral response
■ Photo sensitivity temperature characteristics
(Typ. Ta=25 ˚C)
0.8
TEMPERATURE COEFFICIENT (%/˚C)
0.6
S3931
S3932
0.4
0.2
S3270
QE=50 %
0
400
600
800
(Typ.)
+2.0
QE=100 %
PHOTO SENSITIVITY (A/W)
S3931, S3932, S3270
+1.5
+1.0
S3270
0
-0.5
300
1000
S3931, S3932
+0.5
WAVELENGTH (nm)
400
500
600
700
800
900
1000 1100
WAVELENGTH (nm)
KPSDB0070EC
KPSDB0069EC
■ Dark current vs. reverse voltage
■ Terminal capacitance vs. reverse voltage
(Typ. Ta=25 ˚C)
S3270
DARK CURRENT
1 nA
100 pA
S3932
S3931
10 pA
1 pA
0.1
1
10
100
REVERSE VOLTAGE (V)
1 nF
S3270
S3932
100 pF
S3931
10 pF
1 pF
0.1
1
10
100
REVERSE VOLTAGE (V)
KPSDB0071EC
2
(Typ. Ta=25 ˚C, f=10 kHz)
10 nF
TERMINAL CAPACITANCE
10 nA
KPSDB0072EC
One-dimensional PSD
S3931, S3932, S3270
■ Example of position detectability (Ta=25 °C, λ=900 nm, spot light size: φ0.2 mm)
S3931
S3932
+150
POSITION DETECTION ERROR (mm)
POSITION DETECTION ERROR (mm)
+150
+100
+50
0
-50
-100
+100
+50
0
-50
-100
-150
-150
-3
-2
-1
0
+1
+2
POSITION ON PSD (mm)
+3
KPSDB0011EB
-6
-5
-4
-3
-2
-1
0
+1 +2 +3 +4 +5 +6
POSITION ON PSD (mm)
KPSDB0012EB
POSITION DETECTION
ERROR (µm)
S3270
+100
-100
-20
-15
-10
-5
0
+5
+10 +15 +20
POSITION ON PSD
KPSDC0068EA
■ Conversion formula of spot light position on the PSD
If output signals (photocurrent) I1 and I2 are obtained
from electrodes X1 and X2, then the light spot position
(x) on the PSD can be found by the following formula.
L
X2
X1
x
I2 - I1
2x
=
I1 + I2
L
ACTIVE AREA
KPSDC0010EA
■ Correction for position detection error
Position detection characteristics obtained by the above
formula can be corrected to reduce position detection
errors. For example, the maximum position detection
error (±120 µm) of S3931 can be significantly reduced
to ±9 µm by using the least square method.
3
One-dimensional PSD
S3931, S3932, S3270
■ Dimensional outlines (unit: mm)
S3932
9.2 ± 0.2
15.2 ± 0.2
4.8 ± 0.2
PHOTOSENSITIVE
SURFACE
ACTIVE AREA
PHOTOSENSITIVE
SURFACE
0.7
4.0
4.0
1.5 ± 0.2
(4 ×)0.25
5.08 ± 0.3
1.5 ± 0.2
0.7
(4 ×)0.25
X
X
5.08 ± 0.3
ACTIVE
AREA
4.8 ± 0.2
S3931
CATHODE (COMMON)
ANODE (X2)
CATHODE (COMMON)
ANODE (X1)
(4 ×) 0.4
5.08 ± 0.3
(4 ×) 0.4
10.16 ± 0.4
CATHODE (COMMON)
ANODE (X2)
CATHODE (COMMON)
ANODE (X1)
KPSDA0048EA
KPSDA0049EA
S3270
5.5 ± 0.25
ACTIVE AREA
55 ± 0.5
2.2
3.0
42.3 ± 0.4
1.0
5.0 ± 0.2
X
(2 ×) R1.1
R2.0
0.45 ± 0.05
LEAD
40.3 ± 0.4
1.7
3.75 ± 0.25
1.4
PHOTOSENSITIVE
SURFACE
1.0
8.5 ± 1.5 2.5 ± 0.2
4.0
ANODE (X1)
CATHODE (COMMON)
ANODE (X2)
KPSDA0050EB
Information described in this material is current as of April, 2011. Product specifications are subject to change without prior notice due to improvements or other reasons. Before assembly into final products, please contact us for the
delivery specification sheet to check the latest information.
Type numbers of products listed in the delivery specification sheets or supplied as samples may have a suffix "(X)" which means preliminary specifications or a suffix "(Z)" which means developmental 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.
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) 8152-375-0, Fax: (49) 8152-265-8
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 int. 6, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
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Cat. No. KPSD1002E06
Apr. 2011 DN