
MCP2030
(a) Modulation Depth Definition
Amplitude
Modulation Depth (%) =
A-B
A+B
X 100%
Input Signal
t
B
A
(b) Input signal vs. minimum modulation depth setting vs. LFDATA output
Amplitude
7 mV PP
10 mV PP
Coil Input Strength
Input Signal
Modulation Depth (%) =
t
10 - 7
10 + 7
X 100% = 17.64%
Input signal with modulation depth = 17.64%
Demodulated LFDATA Output when MODMIN Setting = 14%
t
(LFDATA output = toggled)
Amplitude
Demodulated LFDATA Output if MODMIN Setting = 33%
(LFDATA output = not toggled)
0
FIGURE 5-5:
Modulation Depth Examples.
t
? 2005 Microchip Technology Inc.
DS21981A-page 41