Datasheet

IN (PIN 3)
OUT (PIN 8)
o
1 1
1.1
f
R C
»
LM567 , LM567C
SNOSBQ4E –MAY 1999–REVISED DECEMBER 2014 www.ti.com
11.2.1.2 Detailed Design Procedure
11.2.1.2.1 Timing Components
To calculate the timing components for an approximated desired central detection frequency (f
0
), the timing
capacitor value (C
1
) should be stated in order to calculate the timing resistor value (R
1
). Typically for most
applications, a 0.1-µF capacitor is used.
(2)
11.2.1.2.2 Bandwidth
Detection bandwidth is represented as a percentage of f0. It can be selected based on the input voltage levels
(Vi). For Vi < 200 mV
RMS
,
(3)
For Vi > 200 mV
RMS
, refer to Table 2 or Figure 5.
11.2.1.2.3 Output Filter
The output filter selection is made considering the capacitor value to be at least twice the Loop filter capacitor.
C
3
≥ 2C
2
(4)
11.2.1.3 Application Curve
Figure 13. Frequency Detection
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