About
The CA3 is an ASIC with 32/64-channels for energy resolved single-photon counting optimized for CZT/CdTe detectors. Each channel consists of a preamplifier, two shaping amplifiers, 3 or 6 (depending on operating mode) discriminators and 16-bit counters.
The CA3 has to main modes: 32 channel with 6 energy levels discriminated or with 64 channels and 3 energy levels discriminated. Each energy level is configured globally from input pads and can be adjusted per channel by internal DACs. The counters are outputted through a parallel interface, which makes it possible to connect multiple CA3 on the same bus.
Publications
Product Features
Detectors | CZT, CdTe |
Detectors | CZT, CdTe |
Application | Counting, Imaging |
Number of inputs | 32 / 64 |
Input charge range | 0 fC to -4.2 fC |
Shaping time | 50 ns |
Nominal capacitive load | 10 pF |
Equivalent Noise Charge (ENC) | 105e + 40e/pF |
Trigger threshold | Adjustable per channel |
Trigger outputs | Common trigger output for all channels |
Outputs | 16-bit counter parallel interface with overflow |
Test and calibration | 1 digital in, 1 external capacitor and 1 internal capacitor |
Power consumption | 210 mW (32 channel mode), 270 mW (64 channel mode) |