HAMAMATSU PHOTONICS K.K., Solid State Division

1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: (81) 053-434-3311, Fax: (81) 053-434-5184, http://www.hamamatsu.com

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North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01

Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741

Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.

Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2001 Hamamatsu Photonics K.K.

Charge amplifier

H4083

Cat. No. KACC1053E01

Apr. 2001 DN

COMPONENT SIDE

(8 ×) 2.54

0.5

0.25

4 MAX.

SOLDER SIDE

(7)

THROUGH-HOLE

FOR PHOTODIODE

The left end pin is designated No. 1 when viewed from the component side with the pins facing downwards.

q Using pin No. 2

Use pin No. 2 when changing the feedback constant which is typically 50 M

Ω/2 pF. Connect feedback resistance and capaci-

tance between pin No. 2 and No. 9. Note that this connection is made parallel to the internal feedback resistance and capaci-

tance.

q Changing the feedback resistance and capacitance

If you want to change the feedback constant without making

parallel connections, directly replace the resistor (Rf) and ca-

pacitor (Cf) shown at the right, which serve as feedback resis-

tance and capacitance.

Replacement components shoud be 2012 size.

q Using through-holes A and B

When H4083 is not covered with protective coating, a photo-

diode (such as S3590 series) can be directly soldered on the

board. In this case, insert the photodiode leads into the through-

holes from the solder side.

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Cf

Rf

s Component side diagram

KACCC0136EA

s Dimensional outline (unit: mm)

KACCA0017EB

s

Pin connection

Pin No.

Symbol

Content

➀

IN

Input terminal

➁

GAIN

Feedback constant adjustment terminal

➂

GND *

Input ground terminal

➃

CAL

Last pulse input terminal

➄

GND *

Power and output ground terminal

➅

-12 V

Power terminal

➆

+12 V

Power terminal

➇

GND *

Output ground terminal

➈

OUT

Output terminal

Through-hole A

P

Anode connection terminal

Through-hole B

N

Cathode connection terminal

* GND is internally connected.