Dataq DI-725/E, User Manual

Page: 13 / 108

DI–720/DI–722/DI–730 Series User Manual
Specifications
3
2. Specifications
Signal Connections
Make signal connections to the two 37-pin, D-type connectors on the front panel of DI-720/722 Series instruments
or to the banana jacks on the front panel of DI-730 Series instruments. On DI-720 Series instruments, signal connec-
tions can also be made with the DI-205 (optional) general purpose signal interface providing convenient banana
jacks for analog input signals. See “The DI-205: Signal Input/Output Panel” on page 41 for more information. Note:
the DI-205 is an extra-cost option and is not included with the purchase of a DI-720 Series instrument.
Interface Characteristics
Compatible computer architecture: Any PC architecture. Connects to computer via the parallel (or printer)
port. Supports standard, bi-directional, or EPP communication modes.
Optional communication interfaces include Ethernet and Universal
Serial Bus (USB).
Analog Inputs
Number of input channels:
DI-720 Series 32 single-ended/16 differential (software selectable per channel)
DI-722-16 Series 24 differential, 16 single-ended (software selectable on channels 17-32)
DI-722-32 Series 32 differential
DI-730 Series 8 isolated fixed differential plus 16 non-isolated general purpose inputs
(16 single ended or 8 differential)
Converter resolution: DI-72x: 16-bit; 14-bit when used with W
IN
D
AQ
software
DI-730: 14-bit
Common mode rejection ratio: DI-72x: 80 dB minimum @ A
v
=1
DI-730: 120 dB minimum @ DC to 60Hz
Accuracy: V
in
<= 800V ±(0.25% of full-scale range ±100µv)
V
in
> 800V ±(0.5% of full-scale range)
Crosstalk: -75 dB @100kHz (50 KHz for DI-722) into 100
Ω
unbalanced
Sample throughput rate (max samples/second; software selectable per channel):
Standard Printer Port DI-720, DI-722, and DI-730: 40,000 samples/second max
Bi-directional Printer Port DI-720: 80,000 samples/second max
DI-722: 50,000 samples/second max
DI-730: 80,000 samples/second max
EPP Printer Port DI-720: 200,000 samples/second max
DI-722: 50,000 samples/second max
DI-730: 150,000 samples/second max
USB DI-720: 200,000 samples/second max
DI-722: 50,000 samples/second max
DI-730: 150,000 samples/second max
Ethernet DI-720: 180,000 samples/second max
DI-722: 50,000 samples/second max
DI-730: 150,000 samples/second max