S3979 Datasheet, PDF (1/4 Pages) Hamamatsu Corporation – One-dimensional PSD 3 to 37 mm resistance length PSD for precision distance measurement

PSD
One-dimensional PSD
S3979, S3931, S3932, S1352, S3270
3 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. S3979 has a 1 × 3 mm active area sealed in a TO-5 package. 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. S1352 and S3270 offer an active area longer than 30 mm, allowing position detection at a long
distance.
S3270 has a visible-cut resin window, and S3270-01 with a transparent resin window is also available.
Features
l Superior position detection ability
l High reliability
l S3931, S3932: Easy to use 4-pin small ceramic package
l Long and narrow active area
S1352: 2.5 × 34 mm
S3270: 1 × 37 mm
s General ratings / Absolute maximum ratings
Type No.
S3979
S3931
S3932
S1352 *²
S3270 *²
Package
TO-5
Ceramic
Window
material *¹
K
R
R
K
R (B)
Active area
size
(mm)
1×3
1×6
1 × 12
2.5 × 34
1 × 37
Applications
l Displacement sensing
l Distance measurement
l Proximity switching
Absolute maximum ratings
Reverse voltage ^{O p erating te m p erature} Storage temperature
VR Max.
Topr
Tstg
(V)
(°C)
(°C)
20
-10 to +60
-20 to +80
-10 to +75
s Electrical and optical characteristics (Typ. Ta=25 °C, unless otherwise noted)
Type No.
Spectral Peak Photo
response sensitivity sensitivity
range wavelength _S
λ
λp λ=λp
Interelectrode
resistance
Rie
Vb=0.1 V
Position
detection error
*³
Saturation
photocurrent *⁴
E
VR=5 V
light spot φ200 µm
VR=5 V
RL=1 kΩ
Dark
current
ID
VR=5 V
Temp.
coefficient
of
ID
TCID
Rise time
tr
VR=5 V
RL=1 kΩ
Terminal
capacitance
Ct
VR=5 V
f=10 kHz
Position
resolution
*⁵
Min. Typ. Max. Typ. Max.
Typ. Max.
(nm) (nm) (A/W) (kΩ) (kΩ) (kΩ) (µm) (µm) (µA) ^{(nA) (nA) (times/° C)} (µs) (pF) (µm)
S3979
100 140 180 ±15 ±60 40 0.1 5
2.5
20
0.1
S3931
S3932
320 to 1100 ₉₂₀
0.55
30
50
80
±30 ±120
±60 ±240
100
0.15 10
0.2 20
1.15
1.5
3.0
40
80
0.2
0.3
S1352
0.6 10 20 30 ±125 ±500 250 2 150
0.7 150 2.1
S3270
700 to 1100 960 0.55 10 15 20 ±100 ±400 300 0.5 20
1.0 100 2.8
*1: K: borosilicate glass, 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)
1