ST ST7538Q, Примечание к применению

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Board description AN2744
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It can be observed from the simulation curves of
Figure 16
and
Figure 17
a maximum loss
at center frequency of 1 dB due to the spread of the components' value.
Figure 15. Measured frequency response of the Rx passive filter for 86 kHz channel (typical)
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
1E+04 1E+05 1E+06
Freq (Hz)
Gai
n
(
d
B
)
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
1E+04 1E+05 1E+06
Freq (Hz)
Gai
n
(
d
B
)
Figure 16. Simulated frequency response of the Rx passive filter for 72 kHz channel with
tolerance effect
1E5 1E4 1E6
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
-18
0
1 dB
1E5 1E4 1E6
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
-18
0
1 dB