BMA-400 Four-channel AC/DC Preamplifier

• Input type: Differential
• Input range for full-scale output: +100mV - 0.5V
• Input impedance: >1000 Megohm
• Noise, referred to input: <5mV P-P, wideband
• Common Mode Rejection: >95dB
• Gain range: 10X - 50,000X, 12-positions
• Low-pass filter: 100Hz - 50kHz, 6-positions
• High-pass filter: DC - 100Hz, 6-positions
• Filter type, slope: Butterworth, flattest response, -12dB/octave
• Stim/record input: TTL
• Input connections (rear panel): Amphenol 703-91T-3478-009 7-pin
• Output connections (rear panel): BNC jack
• Data port connector (rear panel): 25-pin D-SUB female
• Power requirements: 115/230VAC, 10VA
• Dimensions: 12W x 4H x 9D inches, 30 x 10 x 23 cm

Note 1: Not to be used for human life support applications.

The BMA-400 Bioamplifier is a low-noise, four-channel instrument for amplifying EEG, ECG, EMG, and other extracellular biopotential signals. It features low noise, a wide gain range, and sharp cutoff bandpass filters. It can be used as a stable DC amplifier, and includes adjustable DC input offset controls.

Logic inputs control stimulus passing through the recording electrodes. This stim/record inputs, as well as the four channel outputs, are connected to a multi-pin connector on the rear panel for convenient cable connections. Four standard input cables are provided, and a range of electrode lead-wires are available (needle, snap, etc.). Unwired input plugs are available for fully custom electrode configurations.

Applications for the BMA-400 Bioamplifier include multi-channel EEG, EMG, and other extracellular biopotential measurements. Head-stages are available for high-impedance electrodes or custom recording applications, including the ISO-Z isolated head-stage.