
36
Specifications
Product Variations
The H7468 series are photosensor modules assembled with a photomultiplier
tube, an AD converter circuit and a microcontroller. These photosensor mod-
ules operate from a single +5 V supply and convert the photomultiplier tube
analog signals into 12-bit digital data which can be sent to a PC (personal
computer) through the RS-232C interface. The photomultiplier tube supply
voltage and measurement start/stop can also be controlled from the PC.
Metal Package PMT with Internal Charge Amp+ADC Type
Photosensor Modules H7468 Series
Type No.
H7468
H7468-01
H7468-03
H7468-20
300 nm to 650 nm
300 nm to 850 nm
185 nm to 650 nm
300 nm to 900 nm
For visible range
For visible to near IR range
For UV to visible range
High sensitivity in near IR range
Spectral Response
Features
Parameter
H7468
Suffix
Input Voltage (Vcc)
Max. Input Voltage
Max. Input Current
Effective Area
Digital Output: Maximum Output Current
Digital Output: Maximum Sink Current
Voltage between Digital Input and GND
Peak Sensitivity Wavelength
Cathode
Sensitivity
Gain *
2
Anode Dark Current *
2,
*
3
Integration Capacitance
AD Converter Resolution
Integration Time
Dead Time
Sampling
Time
Measurement Count (fixed set reading)
PMT Supply Voltage
Digital High-Level Input Voltage
Digital Low-Level Input Voltage
Digital High-Level Output Voltage
Digital Low-Level Output Voltage
RS-232C Interface Setting
Operating Ambient Temperature
Storage Temperature
Weight
*1: Measured at the peak sensitivity wavelength *2: PMT supply voltage: 800 V
*3: After 30 minute storage in darkness
+4.75 to +5.25
+6
35
8
25
25
-0.3 to Vcc +0.3
400
80
150
—
0.2
60
5.0
×
10
5
0.4
4
1000
12
0.04 to 500 (0.01 step)
0.01 to 500 (0.01 step)
4 to 1000
0.05 to 1000
1 to 127
0 to 1000
4
1
Vcc -0.7
0.6
RS-232C, 9600 baud, Parity none, 8 data bits, 1 stop bit
+5 to +50
-20 to +50
105
None
420
40
70
8.0
—
62
7.0
×
10
5
0.2
2
-01
-03
420
40
70
8.0
—
62
7.0
×
10
5
0.2
2
-20
630
350
500
—
0.45
78
5.0
×
10
5
2
20
Unit
—
V
V
mA
mm
mA
mA
V
nm
A/lm
—
—
mA/W
—
nA
pF
bit
ms
ms
ms
ms
—
V
V
V
V
V
—
°
C
°
C
g
Luminous Sensitivity
Blue Sensitivity Index (CS 5-58)
Red/White Ratio
Radiant Sensitivity *
1
Continuous Reading
Fixed Set Reading
Min.
Typ.
Typ.
Typ.
Max.
Min.
Max.
Min.
Max.