The Measurement Computing / Data Translation DT302 is a multifunction data acquisition board for the PCI bus that integrates analog input/output, digital I/O, and counter/timer functions into a single interface. Bus-mastering architecture offloads data transfer from the host CPU, enabling concurrent analog acquisition and processing. The board is part of the DT300 Series, featuring standardized accessories and unified software support for rapid system integration.
Technical Specifications
Analog Inputs
• 16 single-ended or 8 differential channels
• 12-bit resolution with 11.5-bit ENOB
• Unipolar ranges: 0-1.25 V, 0-2.5 V, 0-5 V, 0-10 V
• Bipolar ranges: ±1.25 V, ±2.5 V, ±5 V, ±10 V
• Sampling rate up to 225 kS/s
• 1024-location channel-gain list for flexible multi-channel configuration
• Programmable gain and software calibration for unipolar or bipolar operation
• Amp Low connection enables 16 pseudo-differential input configuration
Analog Outputs
• 2 channels, 12-bit resolution
• Unipolar ranges: 0-5 V, 0-10 V
• Bipolar ranges: ±5 V, ±10 V
• Output rate up to 10 kS/s per channel (polled operation)
Digital I/O
• 23 total I/O lines across three ports
• Port A and B: 8 lines each (can form virtual 16-line port)
• Port C: 7 lines
• Programmable input or output per port
• Digital output drive: 12 mA sink, 15 mA source
• High-speed dynamic digital input: up to 3 MS/s read rate on Ports A and B
• Digital inputs time-stampable against analog channels
Counter/Timers
• 4 channels, 16-bit resolution
• Event counting, one-shot, and frequency output generation
• Frequency input measurement capability
• Software-selectable duty cycle, frequency, and output polarity
• Internal cascading of two counters; external cascading via accessories
• Two additional 24-bit counter/timers dedicated to A/D clocking and triggering
– Key Features
• PCI bus interface with bus-mastering data transfer
• Software-selectable input referencing and calibration
• Integrated analog and digital signal processing on single board
• High-speed digital input capability for timing-critical applications
– Typical Applications
• Process control and data logging
• Multi-channel analog acquisition with synchronized digital I/O
• Frequency measurement and event counting systems
• Mixed-signal test and measurement
– Compatibility & Integration
PCI bus interface. Part of DT300 Series with common architecture, standardized accessories, and shared software support enabling modular system design.
