Ametek / VTI Instruments / VXI Technology VM3608A 8-Channel, 16-Bit DAC/Waveform Generator

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.