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DT9873 Block Diagram
Figure 27
shows the block diagram of the DT9873 VOLTpoint instrument.
2.5 Hz Filter
1
+
Ω
1 M
2
3
–
Sense
4
Return
Gain Select
1 of up to 48 Channels
*The Open TC LED is not used
on this instrument.
Figure 27: Block Diagram of the DT9873 VOLTpoint Instrument
Isolated
DC-DC
24-Bit
A/D
400
100
10
Calibration
ROM
1 of 8
64 kB
Digital Input
SRAM
Isolators
1 of 8
Digital Output
Isolators
Control
FPGA
USB 2.0
Processor
Principles of Operation
Power LED
USB LED
Limit LED
Open TC LED
USB 2.0
ID ROM
83
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