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

RHD2000 amplifier boards
Seven types of RHD2000 amplifier boards are available from Intan Technologies: RHD2216 amplifier board (top left); RHD2132 amplifier board (top center); RHD2132 16-channel amplifier board (top right); RHD2216 amplifier / accelerometer board (bottom left); RHD2132 amplifier / accelerometer (bottom center); and RHD2164 amplifier board (bottom right). See below for 128-channel amplifier board. (Click for larger image.)

Main Documentation:

RHD2000 evaluation system datasheet

RHD2000 evaluation system catalog

Supporting Documents:

Application note: Adding an LED to amplifier boards

Application note: Accelerometer calibration for amplifier / accelerometer boards

SPI interface cable/connector specification

Pricing information


RHD2000 128-channel amplifier board
RHD2000 128-Channel Amplifier Board with dual 64-pin Molex electrode connectors. (Click for larger image.)

RHD2132 16-channel amplifier board with SPI interface cable
RHD2132 16-Channel Amplifier Board plugged into ultra thin SPI interface cable that provides power to the board and conveys serial digital data. (Click for larger image.)

RHD2000 Amplifier Boards


Intan Technologies offers several types of RHD2000 amplifier boards that act as small front-end modules for the RHD2000 Evaluation System and allow users to connect to electrodes (not included) and record biopotential signals from 16, 32, 64, or 128 low-noise amplifier channels.

Each amplifier board contains a RHD2000-series amplifier chip, a few support components (resistors and capacitors), a 12-pin Omnetics polarized nano connector that mates with an SPI interface cable, and 18- or 36-pin Omnetics nano strip connectors to mate with a variety of commercial recording electrodes. (The RHD2000 128-channel amplifier board uses Molex electrode connectors designed to mate with UCLA silicon probes.)

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

  • Monitor and record signals from 16, 32, 64, or 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.

Up to four amplifier boards may be connected to a USB interface board with a thin, flexible SPI interface cable. Multiple cables may be daisy-chained to form robust digital data links up to 10 meters in length.

There are seven types of amplifier boards available:

Amplifier boards using the RHD2132 or RHD2164 chips have unipolar amplifier 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.

Amplifier boards using the RHD2216 chip have independent bipolar inputs (i.e., in+ and in-) for paired differential recording. This configuration is optimized for recording situations where pairs of electrodes having similar impedances are used, such as surface EMG.

The 18- and 36-pin Omnetics connectors on each amplifier board connect to a variety of commercially-available electrodes. (See individual amplifier pages for more information.) If electrodes with the proper mating connectors are not available, Intan offers an electrode adapter board and two types of wire adapters for custom connections.

An SPI cable adapter board allows the system to be used with commutators or other cables.

A dual headstage adapter allows two amplifier boards to be used with a single SPI interface cable to create high-density recording modules.

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 all amplifier boards are available on our downloads page.

 


 

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