Curtiss-Wright / ACRA Control KAD/ADC/106/C/00 Accelerometer ADC Module - Conformal Coated

The Curtiss-Wright/ACRA Control KAD/ADC/106/C/00 is a conformal-coated accelerometer ADC module that conditions and digitizes sensor signals for precision data acquisition in demanding environments. It processes six dedicated accelerometer channels plus two general-purpose differential inputs with simultaneous 16-bit sampling and programmable digital filtering.

Technical Specifications Input Channels & Signal Conditioning

Six accelerometer inputs with DC-reject and constant current source excitation (3.6 mA typical)

Supports ICP, Isotron, Piezotron, and Deltatron sensor types

Two differential-ended analog channels for general signal measurement

Accelerometer input ranges: ±1 V, ±10 V with four gain settings (Gain 1: -10 V to +10 V; Gain 10: -1 V to +1 V; Gain 100: -100 mV to +100 mV; Gain 1000: -10 mV to +10 mV)

Differential input ranges: ±10 mV to ±10 V

Constant current source compliance voltage: 24 V

Channel isolation: short on any accelerometer input does not affect others Sampling & Filtering

Analog sampling rate: 2 to 24000 Sps

Oversampling rate: 96 kSps to 192 kSps

16-bit simultaneous sampling on each channel

Individual channel sampling rates settable as powers of two relative to each other

Cascaded half-band FIR filters followed by 8th order Butterworth IIR filter

Default cutoff frequency: fc = fs / 4

Maximum bandwidth: 6 kHz (AAAF filter)

User-programmable filter cutoff frequency Electrical Performance

Input impedance (at 3 kHz): 0.8–1 MΩ (powered off); 250–300 kΩ (powered on); 10–10 MΩ (powered on DC)

Common mode voltage range: -10 V to +10 V

CMRR: 50 dB (0 ≤ f ≤ fc)

Crosstalk: -72 to -60 dB (Gains 1, 10, 100); -45 dB (Gain 1000)

DC error (2.2 kΩ load): 1.6 mA

DC current noise: 3 mVrms Physical

Mass: 100 g (3.53 oz)

Conformal coating applied

Key Features

Independent channel isolation prevents crosstalk propagation across accelerometer inputs

Programmable gain and sampling architecture adapts to diverse sensor and bandwidth requirements

Constant current excitation optimizes conditioning for ICP and equivalent sensor families

Flexible sampling rate assignment enables multi-rate data capture within single module

Typical Applications

Vibration monitoring and machinery diagnostics

Structural health monitoring

Transient event capture requiring synchronized multi-channel acquisition

Environmental stress screening (ESS) in avionics and defense platforms

Compatibility & Integration Designed for integration with Curtiss-Wright/ACRA Control systems supporting ICP sensor standards. Conformal coating provides protection in moisture-rich and salt-fog environments.