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 16-Channel Bipolar-Input Recording Headstages
This headstage is optimized for recording applications where pairs of electrodes having similar impedances are used, such as surface EMG. The 16-channel bipolar-input recording headstages have independent in+ and in- inputs on each amplifier channel for paired differential recording.
These headstages mate with the following Intan custom electrode adapters:
The 16-channel bipolar-input 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 #C3313 RHD 16ch bipolar | Part #C3323 RHD 16ch bipolar + accel | |
|---|---|---|---|
headstage inputs | 16 bipolar inputs (in+, in-), 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 | 24 mm x 15 mm | 24 mm x 15.5 mm | |
mass | 0.94 grams | 1.03 grams | |
Headstage Details
Note: Headstage version with accelerometer does not include 0.1″ mounting hole.
Electrode Connector Pinout
Four 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.