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Iris-128S

Iris-128S System

Figure 1. Iris-128S Neural Interface.

Description

The Iris-128S neural interface consists of 2 boards: the headstage and the adapter. The headstage is a small electronic board that is normally placed on top of or nearby the animal model being studied. It has been designed to be as small as possible while using standard, commercially available off-the-shelf components. The adapter is a small electronic board which has been designed to interface with the Intan Recording Controller, the Intan Rec/Stim Controller, and a programmer/computer to program the switches in the headstage via a MCU.

The architecture and schematic of Iris-128S are shown in the figures below.

graph LR
    c0["128-Ch
        Electrode
        Array"]
    c1["`**Headstage**`"]
    c2["`**Adapter**`"]
    c3["Intan Rec
        Controller"]
    c4["Intan Rec/Stim
        Controller"]
    c5["Programmer"]
    c0 <--> c1
    c1 <----> c2
    c2 <--> c3
    c2 <--> c4
    c2 <--> c5

Figure 2. System Architecture of Iris-128S.

Iris-128S System

Figure 3. Schematic of Iris-128S.

Here are the descriptions of each component.

Component Page
Headstage Headstage
Adapter Adapter
MCU MCU

Specifications

  • Recording from all 128 channels.
  • Stimulation from 32 designated channels, where up to 16 of them can be selected for simultaneous stimulation.
  • Compatible with Intan Recording Controller and Intan Stim/Record Controller.
  • SEAM8 Samtec connector for interfacing with 128-ch electrode array and compatible with BlackRock Cereplex E headstages.
  • The headstage has a size of 30.2 x 25.5 mm$^2$.
  • Omnetics 36-POS connector to interface with Adapter board through a single cable.
  • Adapter board draws power directly from the Intan Recording Controller to power itself and the headstage.
  • On-board power management unit (PMU) in the Adapter board generates the required supplies for the MCU and ADGS5414 switches.
  • Programmer in the Adapter board is only needed to update the firmware in the MCU, i.e., change the state of the ADGS5414 switches. After MCU is programmed, only the Intan controlleres are needed.
  • The adapter has a size of 50 x 40 mm$^2$.