NCN5192NGEVB
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11
Figure 15. Output Waveform (Space)
Receiver
The receive band pass filter is implemented on the
NCN5192NGEVB. The values are listed in Table 6 and the
filter schematic is displayed in Figure 16. This is a band pass
filter based on a Sallen-Key topology allowing only
frequencies around the HART signal frequencies to pass
through. For a more detailed description of the filter see the
user manual of A5191HRTNEVB.
Table 6. RECEIVE FILTER COMPONENT VALUES
Reference
Value E12 (Low-cost)
R
30
, R
31
, R
36
220 k
W
, 1%
R
32
, R
35
470 k
W
, 1%
R
33
680 k
W
, 1%
R
34
3.3 M
W
, 1%
C
9
470 pF, 5%
C
10
, C
11
1 nF, 5%
C
7
220 pF, 5%
Figure 16. Receive Filter
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