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Chapter 6
DT9872 Block Diagram
Figure 26
1
+
2
3
–
4
82
shows the block diagram of the DT9872 TEMPpoint instrument.
+425 μA
Isolated
Current Source
DC-DC
2.5 Hz Filter
24-Bit
A/D
Sense
Return
1 of up to 48 Channels
Calibration
ROM
*The Open TC LED is not used
on this instrument.
Figure 26: Block Diagram of the DT9872 TEMPpoint Instrument
1 of 8
64 kB
Digital Input
SRAM
Isolators
1 of 8
Digital Output
Isolators
Control
FPGA
USB 2.0
Processor
Power LED
USB LED
Limit LED
Open TC LED
USB 2.0
ID ROM
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