BCM43455 Preliminary Data Sheet
FM Receiver Specifications
Table 32: FM Receiver Specifications (Cont.)
Conditionsa
Parameter
Minimum Typical Maximum Units
Left and right AC mute
FM input signal fully muted with DAC 60
enabled
–
–
–
–
–
–
dB
dB
–
Left and right hard mute FM input signal fully muted with DAC
disabled
80
Soft mute attenuation and Muting is performed dynamically
–
start level
proportional to the FM wanted input
signal C/N. The muting characteristic is
fully programmable. Refer to “Audio
Features” on page 62 for further details.
Maximum signal plus
noise-to-noise ratio
–
–
–
–
68
64
–
–
dB
dB
%
i
(S + N)/N, mono
Maximum signal plus
noise-to-noise ratio
–
–
g
(S + N) ÷ N, stereo
Total harmonic distortion, Vin = 66 dBμV EMF (2 mV EMF),
1.5
mono
∆f = 75 kHz, fmod = 400 Hz
∆f = 75 kHz, fmod = 1 kHz
∆f = 75 kHz, fmod = 3 kHz
∆f = 100 kHz, fmod = 1 kHz
–
–
–
–
–
–
–
–
–60
0.8
1.0
1.5
%
%
%
%
Total harmonic distortion, Vin = 66 dBμV EMF (2 mV EMF)
stereo
∆f = 67.5 kHz, fmod = 1 kHz, ꢀf
Pilot = 7.5 kHz, L = R
i
Range from 300 Hz to 15 kHz, with
respect to 1 kHz tone
–
–
–
–
–
–60
–
dBc
kHz
Hz
Audio spurious products
Audio bandwidth, upper Vin = 66 dBμV EMF (2 mV EMF)
15
–
(–3 dB point)
∆f = 8 kHz, for 50 μs
Audio bandwidth, lower
(–3 dB point)
20
0.5
Audio in-band ripple
100 Hz to 13 kHz,
–0.5
dB
Vin = 66 dBμV EMF (2 mV EMF)
∆f = 8 kHz, for 50 μs
De-emphasis time
constant tolerance
With respect to 50 and 75 μs
–
–
±5
83
%
RSSI range
With 1 dB resolution and ± 5 dB
accuracy at room temp
3
–
–
–
dBμV EMF
1.41
–3
1.41E + 04 μV EMF
77
dBμV
Stereo Decoder
Stereo channel
separation
Forced Stereo mode
Vin = 66 dBμV EMF (2 mV EMF),
∆f = 67.5 kHz, fmod = 1 kHz,
ꢀf Pilot = 6.75 kHz
–
48
–
dB
R = 0, L = 1
Broadcom®
November 5, 2015 • 43455-DS109-R
Page 110
BROADCOM CONFIDENTIAL
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