BCM4339 Preliminary Data Sheet
FM Receiver Specifications
Table 38: FM Receiver Specifications (Cont.)
Minimum l
Typica
Parameter
Conditionsa
Maximum Units
Left and right AC mute
FM input signal fully muted with DAC
enabled
60
80
–
–
–
–
–
–
–
dB
dB
–
Left and right hard mute FM input signal fully muted with DAC
disabled
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 66 for further details.
Maximum signal plus
noise-to-noise ratio
–
–
–
69
64
–
–
dB
dB
%
(S + N)/N, mono i
Maximum signal plus
noise-to-noise ratio
(S + N)/N, stereog
–
Total harmonic distortion, Vin = 66 dBµV EMF (2 mV EMF),
0.8
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
–
–
–
–
–
–
–
0.8
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
Audio spurious productsi
Range from 300 Hz to 15 kHz, with
respect to 1 kHz tone
–
–
–
–
–
–60
–
dBc
kHz
Hz
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
Deemphasis time
constant tolerance
With respect to 50 and 75 µs
–
3
–
–
±5
83
%
RSSI range
With 1 dB resolution and ± 5 dB
accuracy at room temp
dBµV
EMF
1.41
–3
–
–
14100
77
µV EMF
dBuV
Stereo Decoder
Stereo channel separation Forced Stereo mode
Vin = 66 dBµV EMF (2 mV EMF),
–
48
–
dB
∆f = 67.5 kHz, fmod = 1 kHz,
ꢁf Pilot = 6.75 kHz
R = 0, L = 1
Broadcom®
November 17, 2014 • 4339-DS106-R
Page 136