Intan Technologies, LLC: low-noise amplifier microchips for electrophysiology, EKG, EMG, EEG, ECoG, and neural recording headstages and bio instrumentation

RHD2000 128-channel amplifier board
RHD2000 128-Channel Amplifier Board with small connectors for SPI interface cable and optional electroplating board, and two 64-pin Molex connectors for electrodes. (Click for larger image.)

Main Documentation:

RHD2000 128-channel amplifier board datasheet

RHD2000 evaluation system datasheet

RHD2000 recording system catalog

Supporting Documents:

RHD2000 electroplating board webpage, datasheet

SPI interface cable/connector specification

Pricing information

RHD2000 128-channel amplifier board with connection ports labeled

RHD2000 128-channel amplifier board with connection ports labeled. Two 0.06" mounting holes are provided for optional mechanical attachment. (Click for larger image.)

RHD2000 128-channel amplifier board with interface cables attached

RHD2000 128-channel amplifier board with interface cables. The blue SPI interface cable delivers power to the board and streams digital data to the USB interface board. The optional multicolored cable connects to an electroplating control board and allows users to plate electrode sites to reduce impedance prior to recording. (Click for larger image.)

RHD2000 128-Channel Amplifier Board

The RHD2000 128-channel amplifier board (Part #C3316) is a front-end module designed to work with the RHD2000 Evaluation System, a family of open-source hardware and software that allows users to record biopotential signals from up to 256 low-noise amplifier channels using the revolutionary RHD2000 series digital electrophysiology chips from Intan Technologies.

Each amplifier board contains two RHD2164 amplifier chips, a few support components (resistors and capacitors), a 12-pin Omnetics polarized nano connector that mates with an SPI interface cable, and two 64-pin Molex SlimStack connectors to mate with 128 recording electrodes.

Each 128-channel amplifier board has the following capabilities when used with an RHD2000 USB interface board:

  • Monitor and record signals from 128 low-noise amplifier channels at sampling rates ranging from 1 kSamples/s 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 (both magnitude and phase) at arbitrary frequencies.
  • In situ constant-voltage or constant-current electroplating capability using optional RHD2000 Electroplating Board.

The RHD2000 128-channel amplifier board has 128 amplifier channels with unipolar inputs and a common reference electrode input. This electrode configuration is often used with implanted microelectrodes that have one low-impedance reference wire and a large number of high-impedance recording sites.

Each amplifier board measures 35 mm x 21 mm with a maximum thickness of 4 mm and weighs 2.05 grams. Here is a 3D model of the amplifier board in SolidWorks format.

The dual 64-pin Molex electrode connectors of the RHD2000 128-channel amplifier board are compatible with the UCLA silicon probes developed by Prof. Sotiris Masmanidis. Note that these probes must be electroplated prior to recording using the RHD2000 electroplating board that has been designed to work with this amplifier board.

Intan Technologies offers other amplifier boards, including:

The operation of the USB interface board and amplifier boards are described in more detail in the RHD2000 evaluation system datasheet. All components of the system are shown in the RHD2000 evaluation system catalog. The evaluation system is built around our open-source Rhythm USB/FPGA interface.

Complete schematics of this amplifier board are available on our downloads page.



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