Tektronix / CDS 73A-256 High-Power, 12-Channel D/A Module

The Tektronix/Colorado Data Systems 73A-256 is a 12-channel Digital-to-Analog converter module engineered for VXI systems requiring precise, multi-channel analog voltage generation. This C-Size, single-slot module delivers independent 16-bit D/A conversion across 12 isolated channels, making it ideal for automated test equipment, industrial control, and waveform synthesis applications demanding synchronized or independent analog outputs.

– Technical Specifications

• Channel Configuration: 12 independent D/A channels, 16-bit resolution
• Output Voltage Range: ±16.38 V per channel with 0.5 mV step resolution across the ±16.3835 V span
• Output Current: Minimum 60 mA per channel with all 12 channels driven; individual channels deliver up to ±16.3835 V into 40 Ω loads; aggregate limit 720 mA across all channels
• Monotonicity: Guaranteed to 14 bits
• Conversion Rates: 1000 voltage changes/second (all 12 channels); 3000 voltage changes/second (single channel)
• Operating Modes: Buffered and non-buffered configurations
• Module Form Factor: C-Size, VXI (VME eXtensions for Instrumentation)

– Key Features

• 12 fully independent output channels eliminate crosstalk and enable parallel waveform generation
• Buffered and non-buffered mode selection accommodates both real-time and latched output requirements
• Integrated self-test and LED status indicators simplify field diagnostics and module validation
• Guaranteed 14-bit monotonicity ensures predictable converter behavior across the full output range
• High-current output capability (60 mA minimum per channel) drives low-impedance loads directly

– Typical Applications

• Automated test equipment requiring multi-channel stimulus generation
• Industrial control systems with synchronized analog command signals
• Waveform synthesis and arbitrary function generation
• Multi-axis motion control and actuator command distribution

– Compatibility & Integration

The 73A-256 integrates directly into standard VXI chassis and is functionally similar to the Tektronix VX4730 module, enabling design flexibility and migration paths for established VXI-based test platforms.