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.