ISSN 10637397, Russian Microelectronics, 2011, Vol. 40, No. 1, pp. 52–58. © Pleiades Publishing, Ltd., 2011.
Original Russian Text © E.V. Atkin, A.D. Klyuev, A.S. Silaev, V.V. Shumikhin, A.G. Voronin, I.A. Kudryuashov, D.M. Podorozhnyi, A.Yu. Fedenko, 2011, published in Mikroelek
tronika, 2011, Vol. 40, No. 1, pp. 57–63
In experimental investigations of space rays on
spacecrafts silicon detectors with integrated readout
electronics are used. The sphere of application of sili
con detectors involves tracking systems for measuring
the particle charge of space rays and calorimetric sys
tems. The main parameters that determine the quality
of calorimetric systems are the dynamic range of input
signals, which should reach tens thousands of single
An important parameter of readout electronics is
the consumed power, as well as the weightsize charac
teristics and reliability of apparatuses.
The Russian Nuclon Project, which has been car
ried out by the Federal Space Agency Roskosmos, is
intended for the investigation of space rays on a space
craft [1, 2].
The results of the simulation of physical processes,
which are the purpose of our investigations, illustrated
the high requirements for the readout electronics of
silicon detectors, particularly the fact that the maxi
mum detector signal is no less 100 pC.
The mentioned range has not yet been realized in
any serial integrated microcircuit implemented for
operation with silicon detectors. The closest analog is
the VA32HDR14 microcircuit of the international
company Gamma MedicaIDEAS . In this micro
circuit, a dynamic range not exceeding 30 pC has been
Thus, the development of a new ASIC for the
Nuclon Project is one of the main tasks of our project.
The ASIC allows one to completely implement the
physical program of the experiment.
STRUCTURE OF THE MICROCIRCUIT
The developed microcircuit is intended for the
readout and processing of the signals from microstrip
silicon detectors in a wide dynamic range of signals.
The microcircuit consists of the analog and digital
parts, and its structure is shown in Fig. 1.
The analog part consists of 32 working channels to
read out the signal and two test channels arranged near
the edges of the crystal to decrease the technological
spread of the parameters of the main channels and
those having an identical structure to the main
channels. The most characteristic intermediate
points of the test channels were additionally wired
out to the external additional pads in order to study
separate units in the analog part of the ASIC in
The digital part of ASIC fulfills the following two
(i) The function of postanalog treatment fulfilled
by the interchannel multiplexor and controlling shift
(ii) The functions of calibrating signals.
In the microcircuit, we also use the additional ana
log blocks for the establishment of thermostable refer
ence potentials and fulfillment of voltage–current (in
Readout ASIC for Microstrip Detectors
E. V. Atkin
*, A. D. Klyuev
, A. S. Silaev
, V. V. Shumikhin
**, A. G. Voronin
, I. A. Kudryuashov
D. M. Podorozhnyi
, and A. Yu. Fedenko
National Research Nuclear University MEPhI, Kashirskoe sh. 31, Moscow, 115409 Russia
Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119991 Russia
*email: Eduard Atkin<firstname.lastname@example.org>
**email: Shumikhin Vitaly < email@example.com>
Received May 24, 2010
—The main results of designing a 32channel integrated microcircuit for microstrip detectors of the
Nuclon Project of Roskosmos are considered. The microcircuit is implemented by using 0.35
m CMOS tech
nology of AMIS (Belgium). The description of the integrated microcircuit and its main electrical parameters,
features of the circuit technology, and crystal topology are presented. Record parameters of the dynamic range
of readable signals (more than 100 pC) with a detector capacity of up to 100 pF exhibited by the microcircuit.
CIRCUIT ANALYSIS AND SYNTHESIS