BrainAmp Standard

Rugged portable amplifier for multiple applications

The BrainAmp amplifier is a compact solution for neurophysiology research that can be combined with other units within the same product family to cover a vast range of possible application areas. This fully portable solution can be used for standard EEG/ERP recordings but also for other types of acquisitions even in the “outside” world.

Thanks to its 5 kHz sampling rate per channel, the BrainAmp can be used to record EEG, EOG, EMG signals as well as evoked potentials with a frequency up to 1 kHz. The 16 bit TTL trigger input allows the detection of a large number of markers from visual, accoustic, electrical, magnetic or other stimulation modalities.

The BrainAmps can be used both with passive and active electrodes offering a great degree of flexibility and is powered by a rechargeable battery, the PowerPack.

The 32 channel units can be stacked to expand the number of channels up to 256 and combined with the BrainAmp ExG to record EOG, ECG, EMG and other peripheral signals such as GSR (Galvanic Skin Response), respiration, acceleration, temperature, etc.

Technical Specifications

BrainAmp StandardTechnical specifications
Amplifier
Number of channels (per unit)32
Channel type / referenceReferential channels/acquisition of a reference using a single electrode (unipolar)
Sampling rate5 kHz per channel
Resolution0.1 μV per bit
Measuring range±3.28 mV
BrainAmp StandardTechnical specifications
Amplifier
16 bit TTL (LVTTL) signals, 0 to +5 V (+ 3.3 V), max. 10 mA16 bit TTL (LVTTL) signals, 0 to +5 V (+ 3.3 V), max. 10 mA
Input impedance10 MΩ (for DC)
Filter typeFirst-order filter with 6 dB/octave
Lower cutoff frequency (high pass)0.016 Hz/10 s
Filter typeFifth-order Butterworth filter with 30 dB/octave
High-cutoff frequency (low-pass)/time constant1,000 Hz
Input noise≤ 2 μVpp
Common-mode rejection (CMR)≥ 90 dB
Bit width of the A/D converter (EEG and AUX)16 bit
Amplitude accuracy±2%
DC offset tolerance±300 mV
Integrated impedance measurementPresent; measurement includes ground electrode and reference electrode
Signal transmissionOptically coupled using duplex fiber optic cables
Power SupplyPowerPack (external rechargeable battery) or Mains Power Supply for BrainAmp
Power consumption (in operation)Max. 110 mA
Power consumption (in standby)Typically 7 mA
Operating time between chargesTypically 30 hours with one amplifier, 15 hours with two amplifiers
Dimensions (H x W x D)Approx. 68 mm x 160 mm x 187 mm
WeightApprox. 1.1 kg
Unlocking functionPresent
Locking of unused channelsPresent
Suitable for use in MR scanner roomNo

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