This particularly compact yet powerful photodiode amplifier can be individually configured for a wide range of photodiodes and measuring methods or measuring ranges.
The standard version has a sample rate of 500,000 per second with a digitization depth of 16 bits. In comparison, the »Improved Version« offers 1 megasample per second at 24 bits. The integration times are adjustable from 1 µs to 1 s.
The offset voltage can be numerically corrected via software. The offset current can be compensated analogously via software in 0.1 pA increments. The diode bias voltage is fixed at 50 mV and the diode can be switched off by software.
the photodiode amplifier was developed as part of the Optocubes research project (open source modular system for agile prototyping of laser-based sensors) [Forschungsprojektes Optocubes (Open Source Systembaukasten für das Agile Prototyping laserbasierter Sensoren) – german only], which is funded by the Federal Ministry of Education and Research (BMBF).
There are various measuring methods for use in different applications.
In this setting, a transimpedance amplifier is converted at 500 kHz and its values are numerically averaged during the integration time.
The possible gains here are 103, 104, 105, 106 and 107 V/A.
Maximum diode currents to full scale
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Maximum measured value
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This measurement method is a true analog integrator whose final value is converted after the integration time.
The possible gains here are 109, 1010, 1011, 1012 and 1013 V/A*s.
Maximum diode currents to full scale
(rounded):
Maximum measured value
(rounded):
This measurement method involves a transimpedance amplifier, converted at 500 kHz, whose values are summed numerically during the exposure time.
Amplifications: 106, 107, 108, 109 and 1010 V/C.
Maximum diode currents to full scale
(rounded):
Maximum measured value
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Last update: 2024-14-07