TDT RA4LI, Hardware Reference Manual

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RA16LI-D - 16 Channel Headstage with Differential
The RA16LI-D headstage is designed for fully differential recordings from low impedance
electrodes and electrode caps with input impedance between <1 kOhm and 20 kOhm. It
connects to the Medusa preampli
fi er's 25-pin connector. The simple interface to the RA16PA
preampli fi ers makes it easy to connect your electrodes to our system. An adapter is also
available to connect a low impedance headstage to a PZ preampli fi er. See DBF-MiniDBM Low
Impedance Headstage to PZ Preampli fi er (16-channels) for more information.
The differential inputs allow for improved common mode rejection on all channels. Because of
the increased complexity of the circuitry, the RA16LI-D does not have impedance checking. The
headstage connector is a DB44. The pin out diagram is shown below.
Pin Name Description Pin Name Description
1 A1 Analog Input Channels 14 NA Not Used
2 A2 15 GND Ground
3 A3 16 GND
4 A4 17 NA Not Used
5 Ref Reference 18 NA Headstage Detect
6 NA Not Used 19 NA
7 A5 Analog Input Channels 20 A6 Analog Input Channels
8 A7 21 A8
9 A9 22 A10
10 A11 23 A12
11 A13 24 A14
12 A15 25 A16
13 GND Ground
Low Impedance Headstages | 8