Manual Amplifier 70A

The Manual Amplifier 70A is a full featured, wideband, differential instrumentation amplifier that can be used for a variety of applications. It can condition, amplify and filter low level analog signals.  It is specific for data acquisition, analog recording, line driving, data filtering and signal isolation.

The basic element of the Manual Amplifier 70A is a very stable, low noise differential amplifier with wideband response. Additionally, input impedance is 50 megohms, linearity is 0.01% and common mode rejection is 130 dB for up to 300 Volts. Furthermore dandwidth exceeds 100 kHz for gains from 1 to 1000.

In addition to the above, eleven switch selectable gains and a variable gain multiplier provide continuous coverage from 1 to 5,000. Gain accuracy is also ±0.1% with ±0.02% available as an option. The 70A-5 also has a two pole, switch selectable, low pass filter with bessel response. Although the 70A-6 is the same, it has a six pole bessel response. Please note that butterworth response is also available.

Model 70A provides two independently buffered ±10 Volt full scale outputs each with 100 milliampere drive current. Output impedance is less than 0.1 Ohm for driving long lines and capacitive loads. Output is short circuit protected and current is limited to safeguard external equipment.

Front panel switches select gain step, calibrated or variable gain and filter frequency. Multiturn screwdriver controls set variable gain and input and output zero. The input attenuator and AC/DC coupling options dhave front panel controls.

Each amplifier is floating and line powered providing channel to channel isolation.  The enclosure is a mechanically secure metal case. Ten amplifiers also mount in a 5 1/4 inch high rack enclosure.  The connector panel mounts on the rear while mating connectors come with the rack enclosure.

Key Features of the Manual Amplifier 70A Include:

  • Gains from 0.01 to 5,000
  • 0.1% or 0.02% gain accuracy
  • 100 kHz bandwidth
  • 300 Volt common mode
  • 2 or 6-pole selectable low-pass filter
  • Voltage substitution calibration
  • Dual, 100 mA, floating outputs
  • Optional AC input coupling

For more information, please contact us.


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Download Spec Sheet Here.