C6785 Hamamatsu Photonic Systems, C6785 Datasheet

Manufacturer Part Number

C6785

Description

Manufacturer

Hamamatsu Photonic Systems

Datasheet

1.C6785.pdf (12 pages)

P H O T O D I O D E

Photodiode array with amplifier

S6493/S6494 series

S6493 and S6494 series are Si photodiode arrays efficiently combined with a signal processing circuit. The signal processing circuit is formed on

a single chip by the CMOS process, and includes a shift register, clamp circuit, hold circuit and charge amplifier array, thus allowing a simplified

external circuit configuration.

The photocurrent from the photodiode array is fed to the charge amplifier connected to each element and is converted into a voltage.

The signal voltage is then sent to the clamp circuit and hold circuit, and is finally read out from the shift register in turn as a sequential video

signal. The signal readout is performed by means of the charge storage method, so the output is proportional to the amount of light exposure (the

product of incident light level and integration time). The vide output is a boxcar waveform which is low noise and easy to handle.

In addition, the readout gain can be selected from two levels by changing the voltage to the external input terminal. (The "high" gain is 10 times

that of the "low" gain.) S6493 and S6494 series ensure easy operation since they can operate from a 5 V supply, and yet offer a maximum data

rate of 250 kHz.

Photodiode arrays combined with a signal processing circuit chip

Features

Four types are available

S6493-64: 0.8 mm pitch × 64 ch

S6493-128: 0.4 mm pitch × 128 ch

S6494-64: 1.6 mm pitch × 64 ch

S6494-128: 0.8 mm pitch × 128 ch

Simultaneous integration by using a charge amplifier array

Sequential readout with a shift register

Integrated clamp circuit allows low noise and wide

dynamic range

Two gain levels can be selected

Operates from single 5 V supply input

S6493 series:

Long active area can be configured by use of multiple arrays

phosphor screen type is also available for X-ray detection

Custom designed element size and pitch available

Dedicated driver circuits are available

PHOTODIODE DIFFUSION AREA

KMPDC0072EA

Applications

Image or pattern recognition system