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
• Three sensitivity ranges
   H: 10⁹ V/A
   M: 10⁷ V/A
   L : 10⁵ V/A
• Zero adjustment with high resolution
• Operates on either dry batteries or external power supply
• Compact and lightweight

APPLICATIONs
• Precision photometry
• Laser monitors
• Optical power meters
• Colorimeters
• Low signal current preamplifiers