PSD
Signal processing circuit for 1-D PSD
C3683-01
Circuit board for easier 1-D PSD operation
Features
Position can be measured just by installing a 1-D PSD on
the board.
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Accurate position sensing
Position data of light spot is independent of light intensity.
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Compact design
Head amp, signal addition/subtraction circuits, and analog
divider circuit are mounted on a compact PC board.
Applications
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No complicated adjustments required
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Displacement measurements using DC light
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Various studies using 1-D PSD
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Performance evaluation of 1-D PSD
s
Absolute maximum ratings
Parameter
Supply voltage
Input signal current
Output short-circuit time
Operating temperature
Symbol
Vcc Max.
I
IN
Max.
-
Topr
Value
±18
Vcc Max. × 10
-5
Continuous
0 to +50
Unit
V
A
s
°C
s
Recommended operating range
Parameter
Supply voltage
Symbol
Vcc
Condition
Min.
±14.5
Typ.
±15
Max.
±15.5
Unit
V
s
Specifications / Characteristics (Ta=25 °C, Vcc=±15 V)
Condition
Min.
Typ.
Max.
Unit
5
5
5
0.95 × 10
1 × 10
1.05 × 10
V/A
Factory setup prior to shipping
950
1000
1050
pF
Factory setup prior to shipping
Photocurrent with PSD
1 × 10
-5
Input signal current *
2
I
IN
-
1 × 10
-4
A
installed
Output res pons e tim e
vers us m ovem ent of light
Rise time (output 10 to 90 %)
tr
300
-
-
µs
spot pos ition, m eas ured
w ith P SD installed.
R
PSD reverse voltage
V
0
+5
+14
V
Factory setup prior to shipping
Output offset voltage
Vos
*
3
-10
-
+10
mV
With PSD installed and
Output voltage amplitude
Vo
light spot falling on edge
-10
-
+10
V
of active area.
Output noise (analog divider)
Vn
All range *
3
-
25
-
mVp-p
Current consumption
Icc
*
3
-
±15
-
mA
*1: These resistors are lead types and inserted into sockets, so it can be easily to exchange by the user if necessary in a range
between 1 × 10
4
to 1 × 10
6
Ω.
For more details, see the instruction manual that comes with the product.
*2: PSD does not operate correctly if the input signal current is outside the specified range.
*3: With no PSD installed, 20 µA (X1=X2) is supplied to the circuit as current signal that substitutes for PSD photocurrent
Parameter
Head amp conversion impedance *
1
Feedback capacitance
Symbol
Rf
Cf
1
HAMAMATSU [ HAMAMATSU CORPORATION ]
