Multichannel Systems MPA8I - Manual

Multi Channel Systems
MCS GmbH
Aspenhaustrasse 21
72770 Reutlingen
Germany Fon +49-7121-9 09 25- 0
Fax +49-7121-9 09 25-11
[email protected]
www.multichannelsystems.com
2012 Multi Channel Systems MCS GmbH
Product information is subject to change
without notice.
8-Channel Miniature Preamplifier
The 8-Channel Miniature Preamplifier MPA8I
is connected to the microelectrodes for providing
the initial tenfold amplification stage. It has additional
common ground and reference electrode inputs. The
reference electrode is ideally identical to the recording
electrodes and placed into a comparable but inactive
area or tissue. Background or noise signals that are
picked up by both the reference electrode and the
recording electrodes are removed. The metal case
provides electrical shielding. Electrode damage
is prevented by the very low bias current. The high input
impedance ensures stable long-term recordings: Ideally,
the input impedance would be infinite. As low voltages
are generally recorded, a high current would flow if
the input impedance were low. As a result, the amplifier
would not be able to deliver the current, and the
voltage would break down. The miniature preamplifier
has a high input impedance to avoid this problem.
Input Connector
Pin 1 GND (Ground)
Pin 2 Reference input
Pin 3 to 10 Recording channels 1 to 8
Pin 11 GND (Ground)
3 7
15
4 6 2
13
5 8
9 10 14 12 11
1
Output Connector 15-Pin D-Sub Male Connector
Pin 1 GND (Ground)
Pin 9 GNDS (Signal Ground)*
Pin 2, 10, 3, 11, 4, 12, 5, 13 Recording channels 1 to 8
Pin 6, 14, 7 Ground (GND)
Pin 15 Positive supply voltage
Pin 8 Negative supply voltage
Please note that the black side is considered the top side!
* = Connected to the ground of the
amplifier. The signal ground is used
as the reference for the following
filter amplifier.
8-Channel Miniature Preamplifier Outputs
8-Channel Miniature Preamplifier Inputs