AXN/ADC/404 Axon Full/Half bridge ADC

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Key Features

  • 12 full or 1/2 bridge, potentiometer or differential ended input channels
  • Programmable input range
  • High accuracy (0.02% FSR typical)
  • Programmable voltage excitation per channel
  • Short on any channel does not affect others
  • 16-bit simultaneous sampling with three configurable output streams on each channel
  • Completion resistors and classic shunt


  • Bridge sensors and strain gage measurement
  • Differential voltage measurement
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The AXN/ADC/404 provides independent excitation for up to 12 channels and is intended for full or 1/2 bridge sensors, or for differential input measurements.

At the heart of the AXN/ADC/404 is a hard-wired state-machine that oversamples all channels and digitally filters any noise above the user-programmable cutoff frequency.

This is achieved using cascaded, 15-tap FIR filters with output rate decimation, followed by a final FIR or IIR filter. If IIR filtering mode is selected, the last digital filter in the filtering chain is an 8th or 16th order (selectable) Butterworth filter. If FIR mode is selected, the last digital filter in the filtering chain is a 49-tap Kaiser window, Beta 6 filter.

There are three independently configurable output streams per channel, allowing different sample rate, cutoff, and filter type to be selected for each output stream.

All signals are sampled simultaneously. Thus, when several channels are sampled at different sampling rates, at the start of an acquisition cycle, all channels are aligned.

The AXN/ADC/404 supports programmable primary gain, voltage excitation (with compliance up to 32 mA), digital filter type as well as completion resistors and high accuracy.

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