KAD/ADC/106 Accelerometer ADC (current excitation, programmable analog gain, 6 kHz b/w) - 6 channel ICP and 2 channel D/E at 24 ksps

The KAD/ADC/106 is used to condition and digitize up to eight differential ended analog channels. Six of these channels have a constant current source and high-pass (DC-reject) filter for use with ICP accelerometer devices.

At the heart of the KAD/ADC/106 is a hard-wired state-machine that oversamples all channels at a rate between 96 ksps and 192 ksps and digitally filters any noise above the user-programmable cutoff frequency.

This is achieved using cascaded, half-band, Finite-Impulse-Response (FIR) filters followed by an 8th order Butterworth IIR filter with a default cutoff point set at one quarter of the sampling frequency (fc = fs / 4).

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

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Features

  • Six accelerometer input channels with DC-reject
  • Constant current source excitation per channel (3.6mA typical)
  • Two Differential-ended (D/E) voltage input channels
  • Simultaneous sampling 16-bit A/D for each channel
  • High accuracy
  • Programmable input range per channel
  • 8th order Butterworth filter with programmable cutoff frequency per channel
  • Up to 24,000 samples per second per channel
  • Up to 6 kHz bandwidth
  • Enhanced mechanical strength between motherboard and daughterboard
  • High impedance per channel when powered off

Applications

  • Accelerometer signal conditioning and digitalization
  • Suitable for Integrated Circuit Piezoelectric (ICP), Isotron, Piezotron, and Deltatron sensors
  • Differential voltage measurement
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