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C4675-102

16 × 16 element photodiode array detector

Hamamatsu Photonics 

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

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