Abaco Systems / VMIC VMIVME-3118-100 32-Channel 16-Bit A/D Converter Module

The Abaco Systems / VMIC VMIVME-3118-100 is a 32-channel 16-bit analog-to-digital converter module for VMEbus systems. It delivers 52 kSPS conversion rate with 19 µs cycle time per channel, supporting differential or single-ended inputs across jumper-selectable ranges from ±2.5 V to ±10 V. The module combines high-resolution data acquisition with flexible channel configuration and software-programmable gain settings for precision measurement in industrial and scientific environments.

Technical Specifications

• Resolution: 16 bits


• Conversion Rate: 52 kSPS maximum; 3.25 kSPS per channel (minimum 16-channel scanning block)


• Conversion Cycle Time: 19 µs


• Integral Nonlinearity: ±0.005 percent maximum


• Differential Nonlinearity: ±0.0015 percent typical at MSB transition


• Quantization Error: ±1/2 LSB


• Missing Codes: 14-bit 0 percent maximum; 15-bit 0.15 percent maximum; 16-bit 0.6 percent maximum Input Configuration


• Input Channels: 64 differential or single-ended channels supported


• Programmable Scanning: 16, 32, 48, or 64 channels


• Input Ranges: ±2.5 V, ±5 V, ±10 V, 0 to +5 V, 0 to +10 V (jumper-selectable)


• Gain Settings: x1, x10, x100 (software-programmable or jumper-selectable)


• Input Impedance: 5 MΩ (parallel configuration)


• Input Bias Current: 50 nA maximum Performance & Accuracy


• Gain Accuracy: ±0.008 percent FSR (×1), ±0.06 percent FSR (×10/×100)


• PGA Nonlinearity: ±0.005 percent FSR (×1/×10), ±0.01 percent FSR (×100)


• System Accuracy Drift: ±20 PPM/°C (×1), ±50 PPM/°C (×10), ±90 PPM/°C (×100)


• Total Noise: 4,500 µV maximum at gain 1, ±10 V full-scale


• Offset Voltage Drift: ±(3 + 15/G) µV/°C Optional Filtering


• Low Pass Filter Cutoff Frequencies: 10 Hz, 50 Hz, 100 Hz, 500 Hz, 1.6 kHz


• Interchannel Crosstalk: –60 dB to –80 dB (adjacent); –100 dB to –110 dB (alternate) depending on filter selection

Key Features

• Program-selectable channel scanning minimizes data transfer overhead


• Multiple gain settings enable signal conditioning across wide input ranges (±25 mV to ±10 V with external conditioning)


• Optional anti-aliasing filters reduce crosstalk and noise


• VMEbus integration for modular measurement systems

Typical Applications

• Multi-channel industrial data acquisition


• Precision sensor signal measurement


• Scientific instrumentation requiring high channel density


• Process monitoring and control systems