The Measurement Computing / IOtech DAC488HR/4 is a 16-bit, 4-channel Digital-to-Analog Converter with optical isolation, designed for precision analog output in automated test equipment, scientific instrumentation, and control systems. This IEEE 488 programmable instrument operates as a voltage source, function generator, or arbitrary waveform generator, with independently programmable output ranges and update rates to 100 kHz per channel.
Technical Specifications
Analog Output Performance
• Resolution: 16-bit
• Output Ranges: ±1 V, ±2 V, ±5 V, or ±10 V full scale (unipolar or bipolar, software selectable)
• LSB Resolution: 30.5 µV/bit (1 V range) to 305 µV/bit (10 V range)
• Update Rate: Up to 100 kHz per channel
• Output Current: ±10 mA maximum (100 mA available on high-current outputs)
• Output Impedance: 10 Ω
• Settling Time: 6 µs to 0.003% full scale range
• Accuracy (25 ±5°C): ±0.02% ±50 µV to ±500 µV (range dependent)
• Linearity: 0.005%
• Differential Linearity: 0.001%
• Zero Offset: 50 to 500 µV
Isolation
• Channel-to-channel isolation: Optically isolated up to 500 VDC from each other and from IEEE 488 common
Data & Buffering
• Standard buffer: 8 Ksamples per channel
• Optional buffer: 480 Ksamples per channel
• Data loading rate: Up to 500 Kbytes/s via IEEE 488
Clocking & Triggering
• Internal clock sources: 200 kHz, 5 MHz, 5.6448 MHz, 6.144 MHz
• External clock input: Up to 10 MHz
• Trigger sources: Command, IEEE 488 GET, external TTL (rising/falling edge), time event (2 ms to 65,535 ms)
• Programmable trigger delay: 1 to 65,535 update clock counts
Digital I/O
• 8 TTL-level digital inputs
• 8 TTL-level digital outputs
• External TTL clock and trigger inputs included
– Key Features
• Four independent output channels with 500 VDC isolation
• 16-bit precision with 0.005% linearity
• Flexible output modes: one-shot, step, and burst
• Programmable update rates and trigger sources
• High data throughput via IEEE 488 interface
– Typical Applications
• Automated test systems requiring precision analog outputs
• Waveform and arbitrary signal generation
• Multi-channel control and excitation systems
• Isolated output applications in noise-sensitive environments
– Compatibility & Integration
• IEEE 488 programmable interface
• Compatible with standard GPIB control systems
• TTL-compatible trigger and clock integration
