RHS Stim/Recording Headstages

General Information

Two types of RHS headstages allow users to connect to electrodes (not included), record electrophysiological signals from 16 or 32 low-noise amplifier channels, and deliver stimulation pulses on the same channels.

Each headstage contains an Intan RHS stim/amplifier chip, a few support components, a small connector to mate with a digital interface cable, and a connector to mate with a variety of commercial recording electrodes. Multiple headstages may be connected to an RHS stim/recording controller using thin, flexible Stim SPI interface cables. All signals are amplified and digitized directly on the headstage, so data on the interface cables is purely digital and immune to noise pickup.

Every RHS headstage has the following capabilities when used in an RHS stim/recording system:

  • Monitor and record signals from all amplifier channels at sampling rates up to 30 kSamples/s per channel.
  • Reconfigure amplifier analog bandwidth from software over a range of 0.1 Hz to 20 kHz.
  • Measure in situ electrode impedances at user-selectable frequencies.
  • Deliver biphasic or triphasic constant-current stimulation pulses with amplitudes ranging from 10 nA to 2.5 mA.

Note: RHS headstages do not work with the RHD recording controller, the RHD USB interface board, or the Open Ephys system. The RHD and RHS systems are not compatible.

RHS 16-Channel Stim/Recording Headstages

Our 16-channel stim/recording headstage has an 18-pin electrode connector that mates with many commercially-available electrodes, including probes from the following companies:

We recommend using low impedance (below 100 kΩ) electrodes for stimulation purposes due to the limited ±7V compliance range of the RHS headstages.

This headstage also mates with the following Intan custom electrode adapters:

Technical Specs
 Part #M4016
RHS 16ch
headstage inputs 16 unipolar inputs, common reference, ground
electrode connector Omnetics A79041: 18 pins, 2 guide posts
data cable connector 16-pin RHS Stim SPI cable connector;
high-speed serial digital data
size 24 mm x 13 mm
mass 0.99 grams
Intan RHS 16ch headstage with Stim SPI interface cable
RHS 16-channel stim/record headstage with Stim SPI interface cable.

Intan RHS 16ch headstage with ports labeled

The zero-ohm jumper R0 may be removed to disconnect the reference electrode from ground.

Intan RHS 16ch headstage electrode connector pinout

RHS 32-Channel Stim/Recording Headstages

Our 32-channel stim/recording headstage has a 36-pin electrode connector that mates with many commercially-available electrodes, including probes from the following companies:

We recommend using low impedance (below 100 kΩ) electrodes for stimulation purposes due to the limited ±7V compliance range of the RHS headstages.

This headstage also mates with the following Intan custom electrode adapters:

Technical Specs
 Part #M4032
RHS 32ch
headstage inputs 32 unipolar inputs, common reference, ground
electrode connector Omnetics A79025: 36 pins, 4 guide posts
data cable connector 16-pin RHS Stim SPI cable connector;
high-speed serial digital data
size 24 mm x 15 mm
mass 1.35 grams
Intan RHS 32ch headstage with Stim SPI interface cable
RHS 32-channel stim/record headstage with Stim SPI interface cable. A second RHS2116 chip is mounted to the bottom side of the headstage.

Intan RHS 32ch headstage with ports labeled

The zero-ohm jumper R0 may be removed to disconnect the reference electrode from ground.

Intan RHS 32ch headstage electrode connector pinout

Two redundant REF pins and two redundant GND pins are provided on the electrode connector; only one needs to be connected.

Related Products

Pricing information

Supporting Documents