EMG amplifier ETH-256

ECGEEG2-channel

Presentation
The ETH-256 is a general-purpose life-science research amplifier designed for low-noise recording of biopotentials and for conditioning outputs from strain-gauge transducers. Its high input impedance and excellent common-mode rejection enable reliable acquisition of ECG, EMG and EEG signals, as well as measurements from force, displacement and pressure sensors. Each channel supplies ±5.0 V excitation at up to 50 mA. Adapter cables are available for common sensor types.

Working principles
The ETH-256 provides eight selectable gain settings and configurable active filtering to condition signals. Each channel can operate either as a bridge-style transducer amplifier (high input impedance differential input) or as an AC-coupled biopotential preamplifier for human recordings. A three-lead isolated cable is provided for safe surface ECG/EMG/EEG measurement.

Key features

• Two-channel high-performance life-science amplifier
• 8 gain settings: x1, x5, x10, x50, x100, x500, x1k, x5k
• Channels configurable as bridge-style transducer amplifier or biopotential amplifier
• Low-noise AC-coupled preamplifier for biopotential recording
• Four-pole active filter design with sharp roll-offs
• High-pass filter options: DC, 0.03 Hz, 0.3 Hz, 3 Hz
• Low-pass filter options: 5 Hz, 50 Hz, 150 Hz, 2 kHz, 10 kHz
• Each channel provides ±5.0 V excitation at up to 50 mA
• 10 GΩ input impedance (bridge mode) with differential input
• Three-lead isolated cable supplied for safe human ECG/EMG/EEG recordings

Domains of application

• Low-noise recording of human biopotential signals (ECG, EMG, EEG)
• Signal conditioning for strain-gauge transducers (force, displacement, pressure)
• Measurement inputs from thermistors, pH electrodes and other variable-resistance sensors
• Teaching and research in physiology, pharmacology and biomedical engineering

Technical specifications

• Model / Reference: ETH-256
• Channels: 2
• Gain settings: x1, x5, x10, x50, x100, x500, x1k, x5k
• High-pass filter options: DC, 0.03 Hz, 0.3 Hz, 3 Hz
• Low-pass filter options: 5 Hz, 50 Hz, 150 Hz, 2 kHz, 10 kHz
• Filter design: four-pole active filters
• Input impedance (bridge mode): 10 GΩ
• Excitation output per channel: ±5.0 V at 50 mA
• Inputs: differential input for bridge transducers; three-lead isolated headstage for biopotentials
• Noise: low-noise AC-coupled preamplifier for biopotential recording
• Applications: ECG, EMG, EEG, strain-gauge transducers, thermistors, pH electrodes