National Instruments DAQ Series User Manual

Chapter 4 Theory of Operation
DAQCard-700 User Manual 4-2 ni.com
Figure 4-1. DAQCard-700 Block Diagram
The following are the major components making up the DAQCard-700:
• PCMCIA I/O channel interface circuitry
• AI circuitry
Buffer
PCMCIA I/O Channel
I/O Connector
12-Bit
Sampling
ADC
Instrumentation
Amplifier
Input
Mux1 Dual
(8-Channel
Single-
Ended)
Input
Mux2
(4-Channel)
PCMCIA
I/O Channel
Interface
MSM82C54
Scanning
Counter
Interrupt
Interface
OUT0EXTCONV*
A/D Timing
Digital
I/O
DC-DC
Converter
512-Word
FIFO
GATE<0..2>
CLK<1..2>
OUT<0..2>
3
3
2
From A/D FIFO
8
8
To Analog CircuitTo Analog Circuit
1 A Resettable Fuse
+5 V+5 V
+12 V
+12 V
+
–
8
8

National Instruments DAQ Series Specifications

General

Device Type	Data Acquisition (DAQ)
Series	DAQ Series
Manufacturer	National Instruments
Category	Recording Equipment
Input Channels	Varies by model (e.g., 8, 16, 32, etc.)
Sampling Rate	Varies by model (e.g., 100 kS/s, 1 MS/s, etc.)
Resolution	Varies by model (e.g., 12-bit, 16-bit, 24-bit)
Interface	USB, PCI, PXI, Ethernet
Software Compatibility	LabVIEW, MATLAB