S8543 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – One-dimensional PSD Long, narrow active area and surface mountable package

PSD
One-dimensional PSD
S8543
Long, narrow active area and surface mountable package
S8543 is a one-dimensional PSD with a long, narrow active area sealed in a surface mountable chip carrier package. The active area of
0.7 × 24 mm delivers excellent position detection characteristics.
Hamamatsu also provides L5586 infrared LED compatible with S8543.
Features
l Long, narrow active area: 0.7 × 24 mm
l Chip carrier package for surface mount (t=1.36 mm)
l Excellent position detection characteristic and resolution
Applications
l Position detection of optical pickup head
l Distance measurement
l Displacement measurement
l Position detection, etc.
s Absolute maximum ratings (Ta=25 °C)
Parameter
Symbol
Value
Unit
Reverse voltage
VR Max.
7
V
Operating temperature
Topr
-10 to +75
°C
Storage temperature
Tstg
-20 to +80
°C
s Electrical and optical characteristics (Ta=25 °C)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Spectral response range
λ
-
320 to 1100
-
nm
Peak sensitivity wavelength
λp
-
960
-
nm
Photo sensitivity
S
λ=λp
-
0.58
-
A/W
Dark current
ID
VR=5 V
-
1
15
nA
Rise time
tr
RL=1 kΩ, VR=5 V
λ=780 nm, 10 to 90 %
-
20
50
µs
Terminal capacitance
Ct VR=5 V, f=10 kHz
-
65
130
pF
Interelectrode resistance
Rie Vb=0.1 V
100
140
180
kΩ
Position detection error
E
λ=900 nm, VR=5 V
φ200 µm *¹
-
±50
±250
µm
Position resolution
∆R Io=1 µA, B=1 kHz *²
-
0.6
-
µm
Saturation photocurrent *³
Ist VR=5 V
200
-
-
µA
*1: Within ±75 % from center to end of active area
*2: 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). The resolution value listed in this data sheet was calculated under the following
conditions.
• Frequency bandwidth: 1 kHz
• Photocurrent: 1 µA
• Equivalent input noise voltage of circuit: 1 µV (1 kHz)
• Interelectrode resistance: Typical value (refer to the specification table)
*3: This is the upper limit of photocurrent linearity. The upper limit is defined as a point where the photocurrent output deviates
10 % from the linearity.
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