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AXN/ADC/404 Axon Full/Half bridge ADC

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AXN/ADC/404 Axon Full/Half bridge ADC Product Sheet

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

Applications

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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