The Measurement Computing PCI-DAS1200 is a multifunction data acquisition card for PCI bus systems, delivering integrated analog input, analog output, and digital I/O capabilities for scientific research, industrial automation, and test and measurement applications.
Technical Specifications
Analog Input
• 12-bit resolution with 7800 converter type
• 8 differential or 16 single-ended channels (software-selectable)
• Input ranges: ±10 V, ±5 V, ±2.5 V, ±1.25 V (bipolar); 0–10 V, 0–5 V, 0–2.5 V, 0–1.25 V (unipolar)
• 3 µs conversion time; 330 kHz minimum throughput
• 1024-sample FIFO with programmable pacing (internal counter, external source, or software polled)
• Burst mode: 3 µs rate
• External digital trigger with rising edge and hardware trigger support
• Relative accuracy: ±1.5 LSB; integral linearity: ±0.5 LSB typical (±1.5 LSB max)
• Gain error: ±0.02% of reading maximum; gain drift: ±6 ppm/°C
• CMRR @ 60 Hz: 70 dB; input impedance: 10 MΩ minimum
• Absolute maximum input voltage: ±35 V
Analog Output
• 12-bit resolution; AD7847AR D/A converter
• 2 output channels
• Ranges: 0–10 V, 0–5 V, ±10 V, ±5 V (software-configurable)
• Offset drift: ±5 ppm/°C maximum (bipolar and unipolar)
• Output short-circuit rating: 25 mA indefinite
Digital I/O
• 24-bit total configuration via 82C55A controller
• Two 8-bit ports and two 4-bit ports, independently configurable as input or output
• Input high: 2.0 V minimum; output low: 0.4 V maximum; output high: 3.0 V minimum
• Output sink current: 2.5 mA @ 0.45 V; source current: 2.5 mA @ 2.4 V
Counter/Timers
• Three 16-bit counters (82C54 type) per device
• Counter 0: ADC residual sample counter sourced from ADC clock
– Key Features
• Pre-trigger and post-trigger capability (unlimited samples; >512 total required)
• Data transfer via REPINSW, interrupt, or software poll
• Software-selectable burst mode for high-speed acquisition
• Temperature-stable operation with minimal drift specifications
• No missing codes guaranteed at 12-bit resolution
– Typical Applications
Scientific instrumentation, data logging, process control, sensor signal conditioning, and transducer interface systems requiring flexible analog and digital signal acquisition and generation.
