RHD Recording Headstages
We offer several types of RHD headstages that allow users to connect to electrodes (not included) and record electrophysiological signals from up to 128 low-noise amplifier channels.
Each headstage contains an Intan RHD 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 RHD recording controller or USB interface board using thin, flexible 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 RHD headstage has the following capabilities when used in an RHD 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.
Note: RHD headstages do not work with the RHS stim/recording controller. The RHD and RHS systems are not compatible
RHD 32-Channel Recording Headstages
Our 32-channel recording headstages have 36-pin electrode connectors that mate with many commercially-available electrodes, including probes from the following companies:
- Atlas Neuroengineering (32ch semi-chronic, chronic probes)
- Blackrock Microsystems (Cereplex M connector)
- BMSEED (in vitro MEAs)
- Doric Lenses (opto-electric cannulas)
- MicroProbes (most array types)
- NeuroNexus (CM32, OCM32LP, H32, OH32LP, MR_CM32, MR_H32, V32, OV32, VC32, MR_H64, MR_HC64, MCM64, MH64, MSH64 and others)
- Plexon (CON/32m-V and others)
- Cambridge NeuroTech (ASSY-116 probes)
These headstages also mate with the following Intan custom electrode adapters:
The 32-channel headstages come in two versions: with and without a 3-axis accelerometer which can be used to synchronize electrophysiological data with headstage movement.
Technical Specs | Part #C3314_WMS RHD 32ch | Part #C3324_WMS RHD 32ch + accel | |
|---|---|---|---|
headstage inputs | 32 unipolar inputs, common reference, ground | ||
electrode connector | Omnetics A79025: 36 pins, 4 guide posts | ||
data cable connector | 12-pin RHD SPI cable connector;
high-speed serial digital data | ||
3-axis accelerometer | no | Yes | |
size | 25 mm x 14 mm | 24 mm x 14 mm | |
mass | 1.15 grams | 1.25 grams | |
Headstage Details
The zero-ohm jumper R0 may be removed to disconnect the reference electrode from ground. The zero-ohm jumper R4 can be removed to disable LVDS signaling.
Note: Headstage version with accelerometer does not include 0.1″ mounting hole.
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
- RHD recording system
- RHD SPI interface cables
- RHD dual headstage adapter
- Adapters for custom electrodes
- LVDS adapter board for custom hardware development
Supporting Documents
- Application note: Accelerometer calibration
- Application note: Adding an LED to headstages
- Application note: Interfacing a microphone to headstages
- Application note: Adapting RHD SPI cables to a commutator
- RHD SPI cable/connector specification
- Complete schematics of all RHD headstages are available for download.