  The Multi-Pixel Photon Counter (MPPC) or Silicon Photomultiplier (SiPM) can
detect from a single photon to several thousand ones; it has high gain
-$10^{5}$ to $10^{6}$-, low operation voltage -65 to 75 Vdc-, and small size
-typically 3.85 mm $\times$ 4.35 mm $\times$ 1.45 mm-; it is suitable for very
low light level detection applications, like in cosmic ray detectors, in
high-energy particle detectors, and in ionizing radiation detection in general.
To study, test, and apply the Hamamatsu Multi-Pixel Photon Counter S12572-100P,
we proposed a three-electronic-board MPPC module to connect, to feed and
read-out, and to digitize its signal. The MPPC module waveband operation is
from 100 Hz to 1 MHz; the ratio of outgoing signal to incoming signal
(transmission coefficient) is about 82 % between 100 Hz--10 kHz and 72 %
between 10 kHz--1 MHz; the phase shifts between the incoming and outgoing
signals were close to zero degrees for all frequencies and occasionally,
different from zero degrees; signal transit time is about (741.72$\pm$82.80)
ps; the digitizing efficiency error is 0.88$\times10^{-3}$ %; the digitizing
efficiency is 99.99 %; digitizing time is about (2.96$\pm$0.13) ns. We report
on technical details and physical characteristics of this electronic module to
drive the Hamamatsu Multi-Pixel Photon Counter S12572-100P, and on preliminary
physical results obtained applying this electronic module.
