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
Analog-to-Digital Conversion
• 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
