UFI Model 2122 Universal Bioamplifier

The 2122 is a versatile, low-noise, general-purpose differential amplifier with adjustable gain and low- and high-frequency filtering. Power is supplied by a wall-mount transformer power supply.

Model 2122 specifications

• Excitation supplied: +5 volts DC
• Input impedance: 10 megohm
• Input-referred noise: 2 microvolts peak-to-peak, DC-100 Hz
• Common-mode rejection (CMR): better than 90 dB at 60 Hz
• Gain: 200, 500, 1000, 2000, 5000, and 10000 (switch selectable)
• Low-frequency filtering: 20, 10, 1, 0.5, 0.1, 0.05 Hz (switch selectable)
• High-frequency filtering: 20, 50, 100, 1000, 5000, 10000 Hz (switch selectable)
• Calibration: built-in 50 microvolt and 500 microvolt square wave
• Output voltage swing: +/- 5 volts
• Signal outputs: for DC, high-frequency filtering only; for AC, both high- and low-frequency filtering
• Input connector: 6-pin female Switchcraft EN3 type
• Output connectors: BNC
• Subject isolation: available (see below)
• Power supply: wall-mount transformer
• Rugged ABS plastic case: 7" x 5" x 2.5" (178mm x 127mm x 64mm)
• Weight: 16 ounces (454g)

Model 2122i isolated Universal Bioamplifier

The Model 2122i Universal Bioamplifier is just the same as the Model 2122, except that it incorporates subject isolation using an off-the-shelf signal isolator.

Specifications unique to the Model 2122i

• Subject isolation: output stage includes off-the-shelf isolation module, and measured leakage current values are included

Review a representative Model 2122 user manual

Published references to the Model 2122