C3683-01 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – Signal processing circuit for 1-D PSD

PSD
Signal processing circuit for 1-D PSD
C3683-01
Circuit board for easier 1-D PSD operation
Features
l No complicated adjustments required
Position can be measured just by installing a 1-D PSD on
the board.
l Accurate position sensing
Position data of light spot is independent of light intensity.
l Compact design
Head amp, signal addition/subtraction circuits, and analog
divider circuit are mounted on a compact PC board.
Applications
l Displacement measurements using DC light
l Various studies using 1-D PSD
l Performance evaluation of 1-D PSD
s Absolute maximum ratings
Parameter
Symbol
Value
Unit
Supply voltage
Vcc Max.
±18
V
Input signal current
IIN Max.
Vcc Max. × 10^-5
A
Output short-circuit time
-
Continuous
s
Operating temperature
Topr
0 to +50
°C
s Recommended operating range
Parameter
Supply voltage
Symbol
Vcc
Condition
Min.
±14.5
Typ.
±15
Max.
Unit
±15.5
V
s Specifications / Characteristics (Ta=25 °C, Vcc=±15 V)
Parameter
Head amp conversion impedance *¹
Symbol
Condition
Min.
Typ.
Max.
Unit
Rf
Factory setup prior to shipping 0.95 × 10⁵ 1 × 10⁵ 1.05 × 10⁵ V/A
Feedback capacitance
Cf Factory setup prior to shipping
950
1000
1050
pF
Input signal current *²
IIN
Photocurrent with PSD
installed
1 × 10^-5
-
1 × 10^-4
A
Output response time
Rise time (output 10 to 90 %)
tr
versus movement of light
spot position, m easured
300
-
-
µs
w ith PSD installed.
PSD reverse voltage
Output offset voltage
VR Factory setup prior to shipping
0
+5
+14
V
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 × 10⁴ to 1 × 10⁶ 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
1