Abaco Systems / VMIC VMIVME-3119-021 16-Bit Scanning Analog Input Board

The Abaco Systems / VMIC VMIVME-3119-021 is a 16-bit scanning analog input board for VMEbus systems delivering high-resolution digitization of differential signals across 16 independent channels. The board integrates per-channel programmable-gain amplifiers, fourth-order low-pass filters with DSP-based autocalibration, and a 4 million-sample data buffer to support demanding data acquisition workflows.

Technical Specifications

• 16 differential input channels


• Input signal range: ±10 mV to ±10 V


• 16-bit A/D resolution with high accuracy


• Programmable gain per channel: x1, x10, x100, x1,000 Filtering & Sampling


• Fourth-order low-pass filters (Bessel or Butterworth factory option)


• Selectable cutoff frequencies: 1 Hz, 10 Hz, 100 Hz, or 1 kHz


• Aggregate sampling rate: up to 100 kHz


• Programmable sample period: 10 µs to 3.277 ms with 50 ns resolution Data Acquisition & Buffering


• On-board data buffer: up to 4 million samples


• Flexible triggering: internal, external, or multiboard synchronous


• VMEbus interrupts at mid-scan or end-scan


• ROAK interrupt when buffer reaches 50% or 100% full


• Data-ready flag at end-scan or mid-scan Performance


• Common-Mode Rejection Ratio: specified from DC to 60 Hz with 350 Ω source imbalance


• Adjacent-channel crosstalk: -75 dB (DC to 1 kHz at 100 SPS)


• Other-channel crosstalk: -90 dB


• Input noise: typical and maximum specified in μV RMS Calibration & Self-Test


• Per-channel autocalibration using DSP technology


• Precision internal voltage references for self-test without field cable disconnection

Key Features

• Two-slot VME form factor with UIOC capability


• Software-programmable scan tables for flexible channel sequencing


• Overvoltage input protection on all channels


• Single-byte interrupt vector on VMEbus acknowledgment

Typical Applications Multi-channel data logging, test automation, sensor signal conditioning, process monitoring, and real-time parameter acquisition in VMEbus-based instrumentation systems.

Compatibility & Integration Designed for VMEbus environments requiring deterministic, synchronized analog acquisition across multiple channels with programmable gain and filtering per input.