Datasheet

APCI-3xxx Functions of the board
Please note: During the switching of the voltage range from unipolar to
bipolar or from bipolar to unipolar there is a longer settling time of the
measuring chain.
8.2.3 Analog input switch (differential inputs)
The input impedance is the input resistance (10
12
Ω) of the PGA and the
connected capacities (C
1
and C
2
).
Input impedance= 10
12
Ω || 5 nF
Fig. 8-3: Analog input switch (differential)
*R
Strom
= optional component part for the version current.
*C
DF
= optional component part for DF-filter
Limit frequency f
g =
1 .
=
212.2 KHz
2 п * (75 Ω + 75 Ω) * [C
DF
+ (C
1
||C
2
] (C
DF
not assembled)
8.2.4 Input modes of the analog inputs
16 differential channels are available on the board for the analogue inputs.
The acquisition can be realized in the following modes
1) Simple mode
2) Scan mode
3) Sequence mode
4) Auto refresh mode
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