12-channel charge sensitive preamplifer-shaper circuit with programmable peaking time from 0.75 µs to 4 µs and current compensation on each input. The dynamic range is from 0 to -5.43 fC which covers 3.5 keV to 140 keV in CdTe/CZT. The shaper is connected to a comparator with adjustable threshold settings. When the signal out from the shaper exceeds the comparator threshold a trigger signal is generated. Upon trigger the ASIC delivers a package containing the triggering channel address and a value proportional to the energy of the deposited charge. The ASIC is then automatically reset, and is ready for the next radiation event.The countrate of the ASIC is up to 100 kcps.
|Number of inputs||12|
|Input charge range||12 0 fC to -5.14 fC|
|Shaping time||0.75 µs to 4 µs programmable|
|Nominal capacitive load||4 pF|
|Equivalent Noise Charge (ENC)||110e|
|Outputs||Multiplexed differential current and a digital interface for triggered readout packages.|
|Test and calibration||Internal calibration circuit for gain calibration.|