12 Channel selftriggered CZT readout

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.

Keywords: Radiation detector, X-ray single photon spectroscopy

Product Features

DetectorsCZT, CdTe
ApplicationCounting, Spectroscopy
Number of inputs12
Input charge range12 0 fC to -5.14 fC
Shaping time0.75 µs to 4 µs programmable
Nominal capacitive load4 pF
Equivalent Noise Charge (ENC)110e
Trigger thresholdAdjustable
OutputsMultiplexed differential current and a digital interface for triggered readout packages.
Test and calibrationInternal calibration circuit for gain calibration.