PSD
Signal processing circuit for 1-D PSD
C5923
Circuit board for easier 1-D PSD operation
Features
Position can be measured just by installing a 1-D PSD on
the board.
l
Accurate position sensing
Use of pulse-driven LED allows accurate position sensing
even under background light, and independent of pulsed
light intensity.
l
Compact design
An LED drive circuit, head amp, signal addition/subtraction
circuits, sample hold circuit, synchronization circuit 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 pulsed light synchronized
with the circuit
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Various studies using 1-D PSD
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Performance evaluation of 1-D PSD
s
A bsolute m axim um ratings
P aram eter
S upply voltage
S ig nal Input signal current
proc essor O utput short-circuit tim e
O perating tem perature
Transistor collector-em itter voltage
LE D
Transistor collector current *
1
driver
Transistor collector dissipation *
1
S ym bol
V cc M ax.
I
IN
M ax.
-
Topr
V
CE
Ic
Pc
V alue
±18
V cc M ax. × 10
-5
Continuous
0 to +50
+30
800
600
Unit
V
A
s
°C
V
mA
mW
s
R ecom m ended operating range
P aram eter
S upply voltage
S ym bol
V cc
Condition
M in.
±14.5
Typ.
±15
M ax.
±15.5
Unit
V
s
S pecifications / characteristics (Ta= 25
°C,
Vcc=±15 V )
Condition
M in.
Typ.
M ax.
Unit
V /A
F actory setup prior to ship ping 0.95 × 10
5
1 × 10
5
1.05 × 10
5
21
22
23
pF
F actory setup prior to ship ping
-5
-4
1 × 10
-
1 × 10
A
P hotoc urre nt w ith P S D ins talle d
O utput response tim e
versus m ovem ent of light
Rise tim e (output 10 to 90 % )
tr
30
-
-
µs
spot position, m easured
with P S D installed.
S ig nal
P SD reverse voltage
V
R
0
5
14
V
F actory setup prior to ship ping
proc essor
5
O utput offset voltage
Vos
*
-10
-
+10
mV
W ith P SD installed and
O utput voltage am plitude *
4
Vo
light spot falling on edge
-10
-
+10
V
of active area.
O utput noise (analog divider)
Vn
A ll range *
5
5
10
50
m Vp-p
Current consum ption
Icc
*
5
-
±45
-
mA
Transistor collector current
Ic
*
1
-
170
-
m Ap-p
LE D
Rep etition frequency
f
T
*
1
-
3333
-
Hz
driver
O utput m ethod
-
-
O pen collector
-
*1: D uty ratio: 3/10, pulse width: 90 µ s, LED: L1915-01 (m ade by Ham am atsu; sold separately)
*2: 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 m ore details, see the instruction m anual that com es with the product.
*3: P SD does not operate correctly if the input signal current is outside the specified range.
*4: M axim um output am plitude can be adjusted in a range of ±2 to ±10 V according to PS D type to be used.
*5: W ith no P SD installed and LED turned off; pulsed current of 20 µ A (X 1=X2) is supplied to the circuit as current
signal (duty ratio: 3/10, pulse w idth: 90 µ s) that substitutes for P SD photocurrent
P aram eter
Head am p conversion im pedance *
2
Feedback capacitance *
2
Input signal current *
3
S ym bol
Rf
Cf
I
IN
1
HAMAMATSU [ HAMAMATSU CORPORATION ]
