Abaco Systems / VMIC VMIVME-3128-000M01 Scanning 14-Bit A/D Converter Board

The Abaco Systems / VMIC VMIVME-3128-000M01 is a VMEbus-compatible 14-bit analog-to-digital converter board engineered for high-speed data acquisition in demanding environments. This scanning A/D converter delivers precise analog signal digitization across up to 64 differential or single-ended input channels with program-selectable channel configurations. On-board dual-ported memory, interval timers, and programmable bus interrupters minimize host processor overhead while supporting multiple acquisition modes from continuous autoscanning to triggered burst capture.

Technical Specifications

• Resolution: 14-bit A/D conversion


• Input Channels: 64 differential or single-ended inputs; program-selectable scanning of 16, 32, 48, or 64 channels


• Conversion Rate: 52 kHz to 58 kHz; 17 µs conversion cycle time (acquisition, conversion, and storage)


• Channel Sample Rate (Maximum): 3.625 KSPS (58 KSPS ÷ minimum 16-channel scanning block)


• Data Buffer: 1,024-word capacity; configurable as 16-word deep × 64 channels; selectable 16 to 1,024 data words in six 2:1 ratios


• Programmable Gain Amplifier: Software-selectable gains of 1, 10, or 100; jumper-configurable for fixed or real-time per-channel control


• A/D Voltage Ranges (Jumper-Selectable): 0 to +5 V, 0 to +10 V, ±2.5 V, ±5 V, ±10 V


• Input Range: ±25 mV to ±10 V full-scale; overvoltage protected


• Interval Timer: User-programmable up to 536 seconds; supports repetitive or single-shot modes

Key Features

• Operating Modes: Autoscanning, single-channel random polling, timed burst (repetitive or single-shot), locally triggered burst, remotely triggered burst, and gain loading


• VMEbus Compliance: DTB Slave, Interrupter (1 to 7), Requestor (DYN); ANSI/IEEE STD 1014-1987, IEC 821 and 297; A24/A16:D16/D8 address space support


• Interrupts: Programmable VMEbus interrupts at buffer scan completion or after specified sample counts; dynamic interrupt vector control


• Address Modes: Jumper-selectable short I/O A16 or standard A24 address space; supports supervisory/user privilege and data/program access

Typical Applications High-density multichannel data acquisition, industrial control systems, signal monitoring, and real-time embedded measurement requiring flexible gain control and triggered data capture.

Compatibility & Integration VMEbus systems requiring A/D conversion with minimal processor intervention; integrates with VMEbus backplane infrastructure supporting slave DTB operation and dynamic interrupt handling.