MPR-16-L(Data sheet V1.2_01)

16 fold charge
sensitive preamplifier

mesytec MPR-16-L provides a state of the art multi channel charge integrating
preamplifier, well suited for silicon or gas detectors. The MPR-16-LX can be combined withmesytec spectroscopy amplifier - discriminator unit STM16+ with Lemo input.
See also MPR16-D type to drive differential lines.
Features:
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16 channel compact module
Very low power dissipation (4 V type)
Sensitivity switch, factor 5ESD input protection
Lemo output, can drive terminated BNC lines
Pulser input
Bias voltage up to 400 V
PCB module available for vacuum use

Schematics:(for MPR-16)

mesytec GmbH & Co. KG
Wernher-von-Braun- Str. 1, D-85640 Putzbrunn, Germany
phone: +49 - 89 / 456007-30 fax: +49 - 89 / 456007-39
info@mesytec.com - www.mesytec.com

MPR-16-L

multi channel preamplifier

Technical Data
Energy ranges
powermode

The MPR-16 provides a switch to amplify the output signal by a factor of 5. This helps to provide
large output signals even at low charge depositions and thus provides good noise immunity.
Standard types are 100 MeV, 500 MeV and
2.5 GeV. Other ranges can be realised on request.

LPHP

shaping time

MPR16-LX-100

 / FWHM [us] noise [keV] FWHM
0.4 / 1(5 + 0.06/pF)
1 / 2.5(4 + 0.04/pF)
0.4 / 1(5 + 0.04/pF)
1 / 2.5(4 + 0.027/pF)

Input stage••

Input connector(s): SubD 25 female connector(for a 16 channel unit)
Pin assignment:
FunctionSig-gnd
Cha 1
Cha 2
Cha 3
Cha 4
Cha 5Cha 6
Cha 7
Cha 8••

connector Function
1,2,7,12,13,
Cha 914,15,25
11
Cha 1023
Cha 1110
Cha 1222
Cha 139
Cha 1421
Cha 158
Cha 1620guardringconnector
19618517416324

Positive and negative charge can be amplified
equally.
The guardring output (24) is connected via
R-C-R filter (100 k, 10 nF, 100 k) to thecommon detector bias input.

For MPR16 max range > 100 MeV:
noise < 1E-4 of max range @ 100 pF input
capacity
Pulser input

The pulser is internally distributed to individual
charge termination capacities. Tolerances ±10 %.
MPR16-LX-100
0.78 pF or 1.13 pF(17 / 25 MeV/V)
Detector bias input
•••

•
•

Lemo output: two options available• low power drivers for 4 V output• high power drivers for 10 V output
Rise time 10 ns @ 0 pF input capacity
Rise time 25 ns @ 350 pF input capacity

Noise••••

Ground screws on front and rear side
There are two different ground connections:
input and output ground.
Input ground is connected to the vacuum
vessel if the setup is not isolated(i.e. isolated flange).
In critical environment the output ground canbe connected to the NIM electronics.

Power connector•Power modes can be selected by a jumper on thePCB. High Power mode reduces noise, while low
Power mode may be useful for in vacuum use.

Lemo connector
Maximum voltage 400 V
When connected detector side must be on
ground level: terminate bias input with 50 

Ground connections

Output stage•

MPR16-LX-300
2.4 pF(50 MeV/V)

SubD9 connector:
1, 2 = gnd
3 = +6 V
4 = +12 V
5 = –6 V
9 = –12V (only for MPR16-L10- versions
with 10V output driver)mesytec GmbH & Co. KG
Wernher-von-Braun- Str. 1, D-85640 Putzbrunn, Germany
phone: +49 - 89 / 456007-30 fax: +49 - 89 / 456007-39
info@mesytec.com - www.mesytec.com

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MPR-16-L
Pinout of on board power connector for
PCB version
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•
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gnd+12 V+6V–6 V
LED+
LED–:
:::::

1,3,10,11,127
5913 ("power ok" LED)
14Power consumption for 16 channels
4 V output version(well suited for in vacuum use):
Parameter

LP/HP +6 V
LP/HP –6 V
LP +12 V
HP +12 V
total power
LP-modetotal power
HP-modeMPR16LX-100

MPR16-L4-300
MPR16-L4-500
MPR16-L4-2500

current
[mA]
50
50
40
80

50
50
40

1.1 W-1.6 W

1.1 W

multi channel preamplifier

Cooling

Due to the low power consumption cooling is in
general not necessary.
For in vacuum use, select low power mode ifpossible. The power of a single PCB can be
dissipated without problems. If several PCBs aredensely packed, heat conducting metal sheets
should be placed in between the PCBs.
Avoid to warm up silicon detectors by thedissipated power.
MPR16-L with 10 V output driver are notrecommended for in vacuum use.
Dimensions•••

LengthWidthHeight: 173 mm (without connectors): 105 mm
: 67 mm

LP = low power mode, HP = high power mode
10V output version:
Parameter

LP/HP +6 V
LP/HP –6 V
LP/HP –12 V
LP +12 V
HP +12 V
total power
LP-modetotal power
HP-modeMPR16LX-100

MPR16-L10-300
MPR16-L10-500
MPR16-L10-2500

current[mA]
404090110150

404090110

2.9 W-3.4 W

2.9 W

LP = low power mode, HP = high power modemesytec GmbH & Co. KG
Wernher-von-Braun- Str. 1, D-85640 Putzbrunn, Germany
phone: +49 - 89 / 456007-30 fax: +49 - 89 / 456007-39
info@mesytec.com - www.mesytec.com

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