The Ametek VTI Instruments VM3608A is an 8-channel, 16-bit Digital-to-Analog Converter and Waveform Generator for precision signal generation in test systems. This VXIbus module integrates into the VMIP platform for high-density stimulus applications, supporting static output, FIFO streaming, and arbitrary waveform generation with independent channel control and synchronization.
Technical Specifications
Channels & Resolution
• 8 independent 16-bit DACs per instrument
• 16-bit monotonic resolution
Output Ranges & Accuracy
• ±20 V with 610 µV step; ±10 V with 305 µV step
• Voltage accuracy (10 V range): 3.22 mV; (20 V range): 6.44 mV
• Gain error: ±0.015% + 0.002%/°C
• Offset error: ±2 LSB + 0.2 LSB/°C
Output Current & Performance
• ±50 mA per channel; 1.5 A maximum total per C-size VXIbus card
• Slew rate: 6 V/µs at 50 mA load
• Settling time: 10 µs to 0.1% of specified value
• Conversion rates: 100,000 voltage changes/second (register access, FIFO, AWG modes); 100 voltage changes/second (word serial); up to 2,000 voltage changes/second (scan mode)
– Key Features
Operating Modes
• Static mode: Direct register or word serial access with 512 predefined values per channel in RAM; TTL trigger and front panel control
• FIFO mode: Continuous data streaming via register access; 512 kwords memory (1 Mword optional) divided by active channels; internal timer (100 ns resolution) or external trigger pacing
• Arbitrary Waveform Generator (AWG): Complex waveform generation with looping and branching; 484 kwords memory (996 kwords optional); up to 4,096 unique patterns and segments
Synchronization & Control
• Double-buffered channels for synchronized output updates
• VXIbus TTL trigger lines 0–7, front panel TTL input, or internal timer
• User-supplied or programmable internal clock for AWG pacing
– Typical Applications
Precision stimulus generation for automated test, signal simulation, waveform playback, multi-channel analog output in measurement systems, and complex signal conditioning in laboratory and production environments.
– Compatibility & Integration
VXIbus module designed for VMIP-based test systems requiring high-channel-density analog output with independent control and real-time waveform capability.
