C4675 Datasheet, PDF (3/4 Pages) Hamamatsu Corporation – 16 x 16 element photodiode array detector

16 × 16 element photodiode array detector C4675 series
s Operating principle
When light enters a photodiode, photoelectric conversion
occurs in the photodiode and the photocurrent Ip is gener-
ated. The photocurrent Ip then flows through the current-to-
voltage conversion amplifier feedback resistance Rf and is
output as voltage V (=Ip × Rf).
C4675 series uses current-to-voltage conversion amplifiers
connected to each of the 256-element photodiodes to per-
form parallel signal processing. A low noise bias circuit is
also used to reduce the photodiode junction capacitance.
Type No.
C4675-102
C4675-302
C4675-103
Feedback resistance
100 MΩ
50 MΩ
10 MΩ
Feedback capacitance
1 pF
s Block diagram
Ip
INCIDENT LIGHT
Rf
Cf (1p)
-
+
Ip
Rf
Cf (1p)
-
+
CH 1
CH 2
LOW NOISE BIAS CIRCUIT
Rf
Ip
Cf (1p)
-
+
+15 V
GND
-15 V
CH256
+15 V
GND
-15 V
s Application example
l Nerve potential measurement under microscope
KACCC0001EA
HAMAMATSU C 4 6 7 5 - x x x
AC
GAIN AMP
l 2-D spectrophotometry in visible range
FIBER
HAMAMATSU C 4 6 7 5 - x x x
SPECTRUM
RECEPTACLE
l Fine-modulation light measurement
GAIN AMP
CHOPPER
HAMAMATSU C 4 6 7 5 - x x x
LOCK IN AMP
DATA PROCESSING DEVICE
SH
MUX ADC MEMORY
KACCC0003EA