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The KAD/ADC/129/S2 has four channels of signal conditioning and data acquisition for differential voltages, strain gage, or bridge measurements. In addition to the measurement channel, the KAD/ADC/129/S2 provides independent bipolar excitation for up to four channels. Each D/E signal has a separate programmable amplifier, filter, and A/D converter.

At the heart of the KAD/ADC/129/S2 is a hard-wired state-machine that over-samples all channels at a rate between 200 ksps and 400 ksps and digitally filters any noise above the user-programmable cutoff frequency. This is achieved using cascaded, half-band, decimate by 2, 15 tap, Finite-Impulse-Response (FIR) filters followed by an 8th order Butterworth IIR filter with a default cutoff point set at a quarter of the sampling frequency. All signals are sampled simultaneously. Thus, when several channels are sampled at different sampling rates, all channels will be aligned at the start of an acquisition cycle.

The KAD/ADC/129/S2 is intended for use with strain gauges, and should not be used for asymmetric bridge transducers such as accelerometers, pressure transducers unless sensor re-calibration is carried out on a channel-by-channel basis. If the sense lines or internal offset adjust are not required, refer to the KAD/ADC/129/S1.


  • Four full or ½-bridge, potentiometer or differential ended input channels
  • Programmable input range (±10mV to ±10V)
  • High accuracy (0.02% FSR typical for a range of ±1V and ±10V)
  • Programmable voltage excitation with separate sense lines and balance adjust per channel
  • High input resistance (>10MΩ) when on/off
  • Short on any channel does not affect others
  • 16-bit simultaneous sampling on each channel
  • Up to 100K samples per second per channel
  • Up to 25kHz Bandwidth (AAAF filter)


  • Analog Signal Acquisition
  • Differential Ended
  • Full Bridge
  • Half Bridge
  • Potentiometer
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