MODULE
Photosensor amplifier
C2719
Current-to-voltage conversion amplifier for amplifying weak photocurrent with low noise
C2719 is a current-to-voltage conversion amplifier used to amplify weak photocurrent from a photodiode with very low noise. Three ranges of
photocurrent detection sensitivity level (H, M, L) are selectable to match the input signal. A 10-turn potentiometer is used to zero the amplifier
level so fine adjustments are possible with high resolution.
C2719 operates on the built-in dry batteries so it can be easily used anywhere. An external power input connector is also provided at the rear
panel for a long, continuous operation or for use as part of a measurement system. In such applications, use the dedicated plug to connect to a
stabilized DC power supply.
C2719 was developed specifically for use with Si photodiodes, but it can be used to detect photocurrent from phototubes.
Features
Applications
l
Three
9
sensitivity ranges
H: 10 V/A
M: 10
7
V/A
L : 10
5
V/A
l
Zero adjustment with high resolution
l
Operates on either dry batteries or external power supply
l
Compact and lightweight
l
Precision photometry
l
Laser monitors
l
Optical power meters
l
Colorimeters
l
Low signal current preamplifiers
I
General ratings (Ta=25
°C)
Parameter
Condition
Min.
Output voltage amplitude R
L
=2 kW
±5 (±10)
Offset drift
-
Offset temperature
-
characteristic
Input voltage
-
Recommended input
-
capacitance
Supply voltage
*1
-
External power supply
±6
Battery lifetime
200
R
L
>10 kW
Weight
Including batteries
-
Value in parentheses is measured when external power supply is used.
*1: Batteries: 006 P (9 V) × 2 pieces
Typ.
-
-
-
-
-
±9
-
-
420
Max.
-
±0.1
±25
±100
2 × 10
-
±15
-
-
-9
Unit
V
mV/hr
µV/°C
V
F
V
V
hr
g
I
Electrical and optical characteristics (Ta=25
°C)
Parameter
Conversion impedance
Input current range
Frequency bandwidth
Output noise
*2
(all bandwidth)
Equivalent noise
-14
-12
-10
-14
2 × 10
2 × 10
2 × 10
2 × 10
input current
*2: Measured with a 1.6 kHz lowpass filter added to the output of C2719.
Internal batteries (Vs=±9 V)
H
M
L
9
7
10
10
10
5
to ±5 × 10
-9
to ±5 × 10
-7
to ±5×10
-5
DC to 16
DC to 1600 DC to 1600
0.2
0.2
0.2
0.02
0.02
0.02
External power supply (Vs=±15 V)
H
M
L
9
7
10
10
10
5
to ±10×10
-9
to ±10×10
-7
to ±10×10
-5
DC to 16
DC to 1600 DC to 1600
0.2
0.2
0.2
0.02
0.02
0.02
2 × 10
-12
Unit
V/A
A
Hz
mVp-p
mVrms
A
2 × 10
-10
1
HAMAMATSU [ HAMAMATSU CORPORATION ]
