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CWE Biomedical Amplifier BMA-200 AC/DC
High-performance, battery-operated biopotential amplifier with built-in audio monitor
● High-performance portable extracellular amplifier
● Battery operated
● Amplifier for EEG, ECG, EMG, and other extracellular applications
The BMA-200 is a low-noise, portable, battery operated amplifier for EEG, ECG, EMG, and other extracellular applications. The BMA-200 features a wide gain range, sharp cutoff bandpass filters, an AC calibrator, and a built-in audio amplifier and speaker for monitoring the signal. Stimulus delivery to the electrodes is accomplished by a front-panel switch, or via an external logic signal. True DC response is switch-selectable, with a variable DC offset control. Low-power circuitry contributes to long operating time between charges, or the unit can be operated continuously with the included AC adapter. It can be used as a stable DC amplifier, and includes adjustable DC input offset controls.
Positive and negative DC voltages are provided at the input connector for bridge excitation or powering optional head-stage active probes. For human subject recording, the ISO-Z Isolation Amplifier head-stage should be used. Active probes are available for high-impedance microelectrode applications. The BMA-200 is fully compatible with the complete line of cables, electrodes, and other accessories available for the BMA-931 modular amplifier.
The BMA-200 is the latest in our line of high-performance preamplifiers. Its versatility and wealth of features make it equally at home in the laboratory or as a rugged field instrument.
● 220V charger/adapter
● Pre-wired input cable
● ISO-Z Isolation head-stage
● Spare connectors & pin plugs
Note: Not to be used for human life support applications.
|Input Type||Differential instrumentation amp|
|Impedance||> 109 Ω|
|Wideband Noise, RTI||<7μV P-P|
|Common Mode Rejection||>95 dB|
|Gain Range||10X - 50,000X, 12-positions|
|Filter Type, Slope||Butterworth, flattest response, -12 dB/octave|
|Coupling||AC or DC, switchable|
|Input Offset Adjustment Ranges||+2 mV, +20 mV, +200 mV, jumper selectable|
|Voltages at Input Jack for External Devices||+7.2 V, 20 mA max current|
|AC Calibrator||1 mV P-P square wave, approx. 10 Hz|
|Low-pass Filter||100 Hz - 50 kHz, 6-positions|
|High-pass Filter||DC - 300 Hz, 6-positions|
|Input Connector||Amphenol 703-91T-3478-009 7-pin|
|Stimulus Record Input||TTL negative logic, or switch closure|
|Stimulus Inputs (Rear Panel)||2 mm (0.080”) pin jacks|
|Audio Amplifier||200 mW, built-in mylar speaker|
|Audio Output Connector||3.5 mm stereo mini-phone jack|
|Output Connector (Rear Panel)||BNC jack|
|Operating Time Between Charging||Approx. 24 hours|
|Power Adapter/Charger||24 VDC|