The KAD/ADC/136 is used to condition and digitize up to eight analog channels. Each channel can be configured for use in differential-ended or single-ended voltage measurement, ICP sensor, RTD sensor, thermocouple, full-bridge, half-bridge, or potentiometer mode.
The KAD/ADC/136 provides programmable current or voltage excitation per channel up to 10.2V and 30mA. For each thermocouple channel, it is necessary to select the Junction Compensation Channel setting. Internally, the KAD/ADC/136 performs linearization for RTD and thermocouple modes.
At the heart of the KAD/ADC/136 is a hard-wired state-machine that oversamples all channels at a rate between 100 ksps and 200 ksps and digitally filters any noise above the user-programmable cutoff frequency. This is achieved using cascaded, half-band FIR filters. If IIR filtering mode is selected, the last digital filter in the filtering chain is an 8th order Butterworth IIR filter. There are two 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. When several channels are sampled at different sampling rates, at the start of an acquisition cycle all channels are aligned.
Eight flexible channels that can be used for full or half-bridge, potentiometer, single-ended, differential-ended, Integrated Circuit Piezoelectric (ICP), Resistance Temperature Detectors (RTD, for example PT100) or thermocouples
Simultaneous sampling 16-bit A/D for each channel
High accuracy (up to 0.02% Full Scale Range [FSR] typical)
Programmable primary gain per channel (1, 2, 4… 256)
Programmable input range per channel (up to ±10V)
Programmable balance current per channel
Programmable classic shunt per channel (100kΩ)
Programmable current or voltage excitation per channel
Short-to-ground on any channel does not affect others
Completion resistors for ½-bridge configuration
Two independently configurable output streams per channel, up to 50,000 samples each
15-tap Finite-Input-Response (FIR) Kaiser window or 8th order Butterworth Infinite Impulse Response (IIR) filter configurable per each channel output stream
Up to 12.5 kHz bandwidth
High impedance bridge sensors
Differential-ended or single-ended voltage measurements
Strain gage measurements
Temperature measurements with thermocouples and RTD sensors