C2719 Datasheet, PDF (1/6 Pages) Hamamatsu Corporation – Photosensor amplifier

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
l Three sensitivity ranges
H : 10⁹ V/A
M: 10⁷ V/A
L : 10⁵ V/A
l Zero adjustment with high resolution
l Operates on either dry batteries or external power supply
l Compact and lightweight
Applications
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.
Typ.
Output voltage amplitude RL=2 kW
±5 (±10)
-
Offset drift
-
-
Offset temperature
characteristic
-
-
Input voltage
-
-
Recommended input
capacitance
Supply voltage ^*1
-
-
-
±9
External power supply
±6
-
Battery lifetime
RL>10 kW
200
-
Weight
Including batteries
-
420
Value in parentheses is measured when external power supply is used.
*1: Batteries: 006 P (9 V) × 2 pieces
Max.
-
±0.1
±25
±100
2 × 10^-9
-
±15
-
-
I Electrical and optical characteristics (Ta=25 °C)
Parameter
Conversion impedance
Input current range
Internal batteries (Vs=±9 V)
H
M
L
10⁹
10⁷
10⁵
to ±5 × 10^-9 to ±5 × 10^-7 to ±5×10^-5
External power supply (Vs=±15 V)
H
M
L
10⁹
10⁷
10⁵
to ±10×10^-9 to ±10×10^-7 to ±10×10^-5
Frequency bandwidth
DC to 16 DC to 1600 DC to 1600 DC to 16 DC to 1600 DC to 1600
Output noise ^*2
(all bandwidth)
0.2
0.2
0.2
0.2
0.2
0.2
0.02
0.02
0.02
0.02
0.02
0.02
Equivalent noise
input current
2 × 10^-14
2 × 10^-12
2 × 10^-10
2 × 10^-14
2 × 10^-12
2 × 10^-10
*2: Measured with a 1.6 kHz lowpass filter added to the output of C2719.
Unit
V
mV/hr
µV/°C
V
F
V
V
hr
g
Unit
V/A
A
Hz
mVp-p
mVrms
A
1