Data Translation DT300 Series, Руководство пользователя, Страница: 16 / 164

Chapter 1
16
Features
The DT300 Series is a family of low-cost, multifunction data acquisition boards for the PCI
bus. The DT300 Series consists of the following boards: DT301, DT302, DT303, DT304, DT321,
and DT322. The different features of these boards are shown in
Table 1 .
All DT300 Series board share the following major features:
• PCI bus mastering capability for analog inputs
• 16 single-ended or pseudo-differential analog input channels, or 8 differential analog
input channels
• Signal conditioning through connections to 5B and 7B Series backplanes
• Input gains of 1, 2, 4, and 8
• Continuously-paced and triggered scan capability
• A 1024-location channel-gain list that supports sampling analog input channels at the
same or different gains in sequential or random order
• Up to 256 scans per trigger for a total of 262,144 samples per trigger in triggered scan
mode
• Internal and external clock sources for the analog input subsystem
• Digital TTL triggering for the analog input subsystem
• Software calibration of the analog I/O circuitry
• Two 8-bit digital ports programmable as inputs or outputs on a per-port basis — digital
input lines from these lines can be included as part of the analog input channel-gain list to
correlate the timing of analog and digital events; digital outputs can drive external
solid-state relays
• One 7-bit digital I/O port programmable as a general-purpose (non-clocked) input or
output port
Table 1: Differences Among DT300 Series Boards
Board
Type
Analog I/O
Resolution
Analog Input
Sample Frequency
Analog Input
Ranges
a
a. Assumes a gain of 1. Using these ranges with gains of 2, 4, or 8 yields a number of effective
input ranges; refer to page 75 for more information.
Analog Output
Channels
DT301 12 bit 225 kHz ±10 V, 0 to 10 V 0
DT302 12 bit 225 kHz ±10 V, 0 to 10 V 2
DT303 12 bit 400 kHz ±10 V, 0 to 10 V 0
DT304 12 bit 400 kHz ±10 V, 0 to 10 V 2
DT321 16 bit 250 kHz ±10 V 0
DT322 16 bit 250 kHz ±10 V 2