NuAmps: Portable 40 Channel Digital DC EEG Amplifier

NuAmps is a high-quality and inexpensive 40-channel digital EEG amplifier that is capable of 22 bit sampling at 1000Hz, measuring signals from DC to 260Hz. It is fully compatible with the SCAN software and includes a 12-bit trigger input port for synchronizing with external stimulators such as the Neuroscan Labs STIM system for EP and ERP measurements. Since NuAmps interfaces via USB, it is simple to install and configure and requires no separate power supply.

Specifications

• Monopolar Channel Count.... 40
• Analog inputs 40 unipolar (bipolar derivations can be computed)
• Sampling frequencies 125,250,500,1000 Hz per channel, software selectable for all channels
• Sampling method 40 channels sampled simultaneously
• A/D resolution 22 bits
• Full scale input range ±130 mV
• Input impedance Not less than 80 MOhm
• CMRR =100 dB at 60 Hz
• Input noise 1 µV RMS (6 µV peak-to-peak)
• Bandwidth,3dB down From DC to 262.5 Hz, dependent upon sampling frequency selected
• Interface Universal Serial Bus (USB), full support for Plug-and-Play technology
• Supported electrodes; Gold, Ag/AgCl, Carbon electrodes with Touch Proof (DIN 42-802)style connectors and QuikCap Ag//AgCl electrodes with Plastic DSUB37F
• Digital (TTL) inputs for triggering
• Quality control of electrode application; Measurement of contact impedance ((at frequency 30 Hz) in impedance mode, and Constant monitoring of connection during recording
• Isolation Optical Signal Isolation
• Display 16-letter LCD with background light, displaying amplifier status or electrodes with impedance greater than specified cutoff
• Power supply and energy consumption From USB (5V),in active mode current

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NuAmps