
The H7680/-01 PMT modules are capable of high-speed, high-repetition ga-
ted operation. An optimum design in the combination of circuit and photomul-
tiplier tube delivers excellent gating characteristics including a minimum gate
width of 30 ns (H7680-01), 100 kHz repetition rate, and a gate extinction ratio
of 10
7
. The H7680/-01 can operate on a low +15 V supply because of incor-
porating high-voltage power suppy circuit. And, the incorporated PMT gain
can be controled by adjusting the control voltage between +2 V to +5 V.
52
Product Variations
Specifications
Gated PMT Modules
H7680/-01
Type No.
H7680
H7680-01
Parameter
H7680 / H7680-01
+14 to +16
+17
400
4.0
24
420
100
100
+5 to +40
-20 to +50
850
Supply Voltage
Max. Input Voltage
Max. Input Current
Max. Surge Current
Effective Area
Peak Sensitivity Wavelength
Pulse Linearity *
1
Max. Output Signal Current
Operating Ambient Temperature
Storage Temperature
Weight
Unit
V
V
mA
A
mm
nm
mA
μ
A
°
C
°
C
g
Normally ON type
Normally OFF type
300 nm to 650 nm
Features
Spectral Response
Parameter
H7680 / H7680-01
Bialkali
Borosilicate glass
Linear focused type
10
95
88
11.0
475
4.4
×
10
5
10
200
5
×
10
6
1.7
16
500
Photocathode Material
Window Material
Dynode Structure
Number of Dynodes
Cathode
Character-
istics
Blue Sensitivity Index (CS 5-58)
Luminous Sensitivity
Radiant Sensitivity *
2
Anode
Character-
istics *
1
Gain *
1
Time *
1
Response
Luminous Sensitivity
Radiant Sensitivity *
2
Dark Current
*3
Rise Time
Transit Time
TTS
Typ.
Max.
Unit
—
—
—
—
μ
A/lm
mA/W
—
A/lm
A/W
—
ns
ns
ps
*1: Control voltage = +4.5 V
*2: Measured at the peak sensitivity wavelength
*3: Measured when photomultiplier tube operation is ON. After 30 minute storage in darkness
nA