A5550AFE-S

The DT5550AFES is an analog frontend board designed for SiPM readout.

It is a multichannel preamplifier & shaper to be used in conjunction with one or two DT5550, to digitize the shaped signal. This system allows  to read out up to 64 independent channels, making the solution ideal to perform imaging and high-resolution spectroscopy with SiPM matrices and arrays.

Opposed to widely available ASIC-based solutions, the DT5550AFES is based on discrete preamplification stages, so that it allows the direct sampling of the analog signal generated by the SiPM. Moreover, the large input dynamic range allows to use the board for particles calorimetry applications.

The analog frontend consists in independent transimpedance shaper amplifier (TIA), followed by a single-ended to fully-differential amplifier. Differential signals guarantee a better immunity to noise  and crosstalk between channels, and can be carried several meters away for digitization process, without any degradation.

A power supply module (CAEN A7585D) for SiPM biasing is mounted onboard, providing a common voltage in the range 20-85 V, with the possibility of individual channel adjustment. SiPM temperature is monitored using a digital temperature sensor. Thanks to this feature, a temperature feedback on the bias voltage is implemented.

The DT5550AFES, in conjunction with two CAEN DT5550 open-FPGA boards, realizes a complete 64-channels readout system for SiPMs, with programmable signal processing capabilities. The system can be used for waveform digitization, imaging and spectroscopy purposes. The kit comes with SCI-Compiler, the CAEN user firmware generator and compiler for easy FPGA programming, and a ready-to-use demo software for waveform recording and spectra acquisition.
Developed in collaboration with Nuclear Instruments.