Optoelectronics
Variable Gain Photodiode Amplifier with 200MHz Bandwidth: DHPCA-100
FEMTO Messtechnik GmbH supplies the variable gain transimpedance amplifier DHPCA-100 for amplifying photo currents of fast photodiodes, with a maximum bandwidth of 200MHz equivalent to a signal rise time of 1.8ns.
The gain is adjustable from 102 to 108V/A allowing the measurement of currents in the sub-nano to milli-Ampere range. An adjustable bias voltage is provided for biasing photodiodes. The integrated offset control is useful for adjusting the baseline or compensating photodiode dark currents.The device offers many additional features like signal filters, switchable AC/DC coupling and an integrated digital interface for remote control. The compact amplifier housing offers excellent EMI shielding allowing for use directly at the source before the signal gets degraded by long cables or interfering equipment.
The DHPCA-100 is the ideal tool for amplifying small currents generated by high impedance sources, such as photodiodes or ionisation detectors. Typical applications include spectroscopy, laser physics, particle detection, and general lab use.
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