PHOTOMULTlPLlER TUBE
R2228
For Visible to Near IR Low Light Detection
Extended Red Multialkali Photocathode
28mm(1鈥?/8 Inch) Diameter, 11鈥搒tage, Head鈥揙n Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
MateriaI
Photocathode
Minimum Effective Area
Window Material
Structure
Dynode
Number of Stages
Direct Interelectrode
Anode to Last Dynode
Capacitances
Anode to All Other Electrodes
Base
SuitabIe Socket
Description/Value
300 to 900
600
Extended red multialkali
25
Borosilicate glass
Box鈥揳nd 鈥揼rid
11
3.0
3.5
14鈥損in glass base
E678鈥?4C(supplied)
Unit
nm
nm
mm dia.
pF
pF
MAXIMUM RATINGS (Absolute Maximum Values)
Supply Voltage
Avarage Anode Current
Ambient Temperature
Parameter
Between Anode and Cathode
Between Anode and Last Dynode
Value
1500
250
0.1
鈥?0 to +50
Unit
Vdc
Vdc
mA
CHARACTERISTlCS (at 25
)
Min.
100
Max.
Unit
A/lm
mA/W
A/lm
A/W
30
nA
ns
ns
Typ.
200
Cathode
40
Sensitivity
0.3
20
150
Anode
Sensitivity
3.0 10
4
7. 5 1 0
5
Gain
Anode Dark Current (after 30min. storage in darkness)
8
Anode Pulse Rise Time
15
Time Response
60
Electron Transit Time
NOTE:
Anode characteristics are measured with the voItage distribution ratio shown below.
Parameter
Luminous (2856K)
Radiant at 600nm
Red/White Ratio (R鈥?8)
Luminous (2856K)
Radiant at 600nm
VOLTAGE DlSTRlBUTlON RATlO AND SUPPLY VOLTAGE
K
G
Electrodes
Ratio
1
SuppIy Voltage : 1000Vdc,
Dy1
Dy2
Dy3
Dy4
Dy5
Dy6
Dy7
Dy8
1
Dy9
1
Dy10
1
Dy11
1
P
1
1
K : Cathode,
1
1
Dy : Dynode,
1
1
1
P : Anode, G:Grid
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
lnformation furnished by HAMAMATS U is believed to be reliabIe. However, no responsibility is assumed for possibIe inaccuracies or commission. Specifications are
subjected to change without notice. No patent right are granted to any of the circuits described herein.
漏
1992 Hamamatsu Photonics K.K.
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