C5923 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – Signal processing circuit for 1-D PSD

PSD
Signal processing circuit for 1-D PSD
C5923
Circuit board for easier 1-D PSD operation
Features
Applications
l No complicated adjustments required
l Displacement measurements using pulsed light synchronized
Position can be measured just by installing a 1-D PSD on
the board.
l Accurate position sensing
with the circuit
l Various studies using 1-D PSD
l Performance evaluation of 1-D PSD
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.
s Absolute m axim um ratings
Param eter
Supply voltage
Signal Input signal current
proc essor O utput short-circuit tim e
O perating tem perature
Transistor collector-em itter voltage
LED
driver
Transistor collector current *¹
Transistor collector dissipation *¹
Sym bol
Vcc Max.
IIN M ax.
-
Topr
VCE
Ic
Pc
Value
±18
Vcc Max. × 10^-5
C o n tin u o u s
0 to +50
+30
800
600
Unit
V
A
s
°C
V
mA
mW
s Recom m ended operating range
Param eter
Supply voltage
Sym bol
Vcc
C o n d ition
Min.
±14.5
Typ.
±15
M a x.
±15.5
Unit
V
s S pecifications / characteristics (Ta= 25 °C, Vcc=±15 V )
Param eter
Sym bol
C o n d ition
Min.
Typ.
M a x.
Head am p conversion im pedance *²
Rf Factory setup prior to shipping 0.95 × 10⁵ 1 × 10⁵ 1.05 × 10⁵
Feedback capacitance *²
Cf Factory setup prior to shipping
21
22
23
Input signal current *³
IIN P hotoc urre nt w ith P S D ins talle d 1 × 10^-5
-
1 × 10^-4
O utput response tim e
Rise tim e (output 10 to 90 % )
tr
versus m ovem ent of light
spot position, m easured
30
-
-
Signal
with PSD installed.
processor PSD reverse voltage
VR Factory setup prior to shipping
0
5
14
O utput offset voltage
Vos *⁵
-10
-
+10
O utput voltage am plitude *⁴
W ith PSD installed and
Vo light spot falling on edge
-10
-
+10
of active area.
O utput noise (analog divider)
Vn All range *⁵
5
10
50
Current consum ption
Icc *⁵
-
±45
-
Transistor collector current
LED
driver
Repetition frequency
O utput m ethod
Ic
*¹
fT
*¹
-
-
-
170
-
-
3333
-
O pen collector
*1: Duty ratio: 3/10, pulse width: 90 µs, 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 × 10⁴ to 1 × 10⁶ Ω . For m ore details, see the instruction m anual that com es with the product.
*3: PSD does not operate correctly if the input signal current is outside the specified range.
*4: Maxim um output am plitude can be adjusted in a range of ±2 to ±10 V according to PSD 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 width: 90 µs) that substitutes for PSD photocurrent
Unit
V/A
pF
A
µs
V
mV
V
m Vp-p
mA
m Ap-p
Hz
-
1