TDT RZ2 Manual page 452

10-38
of the system. Check the specifications of your amplifier for voltage range. Also
keep in mind that the range of the headstage varies depending on the power supply
provided by the preamplifier. TDT preamplifiers supply +/- 1.5 V, but third party
preamplifiers may vary. TDT recommends using preamplifiers which deliver +/- 2.5
V or less. Check the preamplifier voltage input and power supply specifications and
headstage gain to determine the voltage range of the system.
The table below lists the input voltage ranges for RA16AC headstages for either a
+/- 1.5 V or +/- 2.5 V power source.
RA16AC4
RA16AC
Technical Specifications
Warning! When using multiple headstages ensure that all ground pins are connected
to a single common node. See "Headstage Connection Guide" on page 6-93, for
more information.
Input referred noise
Headstage Gain
Input Impedance
Pinout Diagram
The numbers in the diagram above show the channel connections to the amplifier.
The electrode connector accepts 0.5 mm diameter male pins.
For pinouts for the preamplifier connector, see the corresponding preamplifier.
RA4AC ‐ 4 Channel Acute Headstage
The 4 Channel Acute headstages are recommended for extracellular neurophysiology
using silicon electrodes, metal microelectrodes, or microwire arrays with input
impedance from 20 kOhm to 5 MOhm.
The RA4AC1 and RA4AC4 headstages have a low-profile 6-pin connector. The
RA4AC1 provides unity gain (1x). The RA4AC4 provides 4x gain and is used with
electrodes with a recommended impedance range of 20 kOhm to 300 kOhm. The
25-pin connector connects to the RA4PA 4-channel Medusa preamplifier.
Acute (Non-ZIF) Headstages
Headstage input range when using
+/- 1.5 V power source
+/- 0.37 V
+/- 0.9 V
rms 3 μV bandwidth 300-3000 Hz
rms 6 μV bandwidth 30-8000 Hz
RA16AC - Unity (1x)
RA16AC4 - 4x
RA16AC-Z - Unity (1x)
10 Ohms
14
(looking into connections)
Headstage input range when using +/
- 2.5 V power source
+/- 0.62 V
+/- 1.9 V
System 3