R2228 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTlPLlER TUBE

PHOTOMULTlPLlER TUBE
R2228
For Visible to Near IR Low Light Detection
Extended Red Multialkali Photocathode
28mm(1–1/8 Inch) Diameter, 11–stage, Head–On Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
MateriaI
Minimum Effective Area
Window Material
Dynode
Structure
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–and –grid
11
3.0
3.5
14–pin glass base
E678–14C(supplied)
Unit
nm
nm
mm dia.
pF
pF
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Supply Voltage
Between Anode and Cathode
Between Anode and Last Dynode
Avarage Anode Current
Ambient Temperature
Value
1500
250
0.1
–80 to +50
Unit
Vdc
Vdc
mA
CHARACTERISTlCS (at 25 )
Parameter
Min.
Typ.
Cathode
Sensitivity
Luminous (2856K)
Radiant at 600nm
Red/White Ratio (R–68)
100
200
40
0.3
Anode
Sensitivity
Luminous (2856K)
Radiant at 600nm
20
150
3.0 10⁴
Gain
7. 5 1 0 ⁵
Anode Dark Current (after 30min. storage in darkness)
8
Time Response
Anode Pulse Rise Time
Electron Transit Time
15
60
NOTE: Anode characteristics are measured with the voItage distribution ratio shown below.
Max.
30
Unit
A/lm
mA/W
A/lm
A/W
nA
ns
ns
VOLTAGE DlSTRlBUTlON RATlO AND SUPPLY VOLTAGE
Electrodes
Ratio
K
G
1
Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11 P
1
1
1
1
1
1
1
1
1
1
1
SuppIy Voltage : 1000Vdc, K : Cathode, Dy : Dynode, 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. _© 1992 Hamamatsu Photonics K.K.