The Abaco Systems/VMIC VMIVME-3118-000 is a VMEbus-compatible analog-to-digital converter module delivering 32 channels of 16-bit data acquisition. It captures analog signals at up to 52 kSPS with configurable input ranges, programmable gain stages, and optional filtering for demanding measurement applications across industrial, laboratory, and scientific environments.
Technical Specifications
Analog Input
• 32 channels, differential or single-ended
• 16-bit resolution
• Full-scale ranges: ±2.5 V, ±5 V, ±10 V, 0 to +5 V, 0 to +10 V, ±25 mV to ±10 V (selectable)
• Programmable gain: ×1, ×10, ×100
• Input impedance: 5 MΩ || 50 pF
• Input bias current: ≤50 nA
• Input noise: 0.3 mV RMS (DC–100 Hz)
• Overvoltage protection: ±40 V maximum
• Input offset voltage: (0.3 + 6/G + 0.6k) mV, where G = gain and k = sample rate in KSPS
A/D Conversion
• Conversion rate: 52 kSPS maximum
• Channel sample rate: 3.25 kSPS (all 16 channels in block)
• Conversion cycle: 19 µs (acquisition, conversion, storage)
• Integral nonlinearity: ±0.005% (best straight line)
• Differential nonlinearity: ±0.0015% typical at MSB
• Quantization error: ±1/2 LSB
• Missing codes: 0.6% maximum at 16-bit
• Data coding: Two’s complement or offset binary (selectable)
Gain & Accuracy
• PGA nonlinearity (DC): ±0.005% FSR (G=1, 10), ±0.01% FSR (G=100)
• Gain accuracy: ±0.008% FSR (G=1), ±0.06% FSR (G=10, 100)
• System accuracy drift: ±20 PPM/°C (G=1), ±50 PPM/°C (G=10), ±90 PPM/°C (G=100)
• PGA offset drift: ±(3 + 15/G) µV/°C
• Total noise: ≤4,500 µV (G=1, FS=±10 V)
Filtering
• Optional low-pass filters: 10 Hz, 50 Hz, 100 Hz, 500 Hz, 1.6 kHz (-3 dB cutoff)
Crosstalk
• Adjacent channels: -80 dB (DC), -60 dB (10 Hz), -70 dB (50 Hz)
• Alternate channels: -110 dB (DC, 50 Hz), -100 dB (10 Hz)
– Key Features
• Wide input range selectivity via jumper and software control
• Selectable low-pass filtering for noise rejection
• High input impedance minimizes loading effects
• Excellent INL/DNL performance supports precision instrumentation
– Typical Applications
• Multi-channel data acquisition on VMEbus backplanes
• Process monitoring and industrial control
• Laboratory instrumentation and signal measurement
• Scientific research requiring simultaneous sampling
– Compatibility & Integration
Module operates within standard VMEbus architectures. Hardware gain selection via jumper or software programming accommodates signal conditioning without external amplification.
