BCM4354 Data Sheet
FM Receiver Specifications
Table 37: FM Receiver Specifications (Cont.)
Typica
Minimum l Maximum Units
Parameter
Conditionsa
Audio in-band ripple
100 Hz to 13 kHz,
Vin = 66 dBµV EMF (2 mV EMF)
–0.5
–
0.5
dB
∆f = 8 kHz, for 50 µs
De-emphasis 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
–
–
14.1m
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
Mono stereo blend and
switching
Blending and switching is dynamically proportional to the FM wanted input signal C/
N. The blending and switching characteristics are fully programmable. Refer to
“Audio Features” on page 63 for further details.
Pilot suppression
Vin = 66 dBµV EMF (2 mV EMF),
∆f = 75 kHz, fmod = 1 kHz
46
–
–
dB
Pause detection
Audio level at which a
pause is detected
Relative to 1 kHz tone, ∆f = 22.5 kHz
Four values in 3 dB steps
Four values
–
–
–
–
–
–
–21
20
–12
40
dB
ms
Audio pause duration
a. Following conditions are applied to all relevant tests unless otherwise indicated: Pre-emphasis and de-emphasis
of 50 us, R = L for mono, DAC Load ≥ 20 kꢀ, BAF = 300 Hz to 15 kHz, and A-weighted filtering applied.
b. Contact Broadcom regarding applications that operate between 65 and 76 MHz.
c. Wanted Signal: ∆f = 22.5 kHz, and fmod = 1 kHz.
d. Interferer: ꢁf = 22.5 kHz, and fmod = 1 kHz.
e. RDS sensitivity numbers are for 87.5–108 MHz only.
f. Vin = ꢁf = 32 kHz, fmod = 1 kHz, ꢁf Pilot = 7.5 kHz, and 95% of blocks decoded with no errors after correction.
g. Vin = 66 dBµV EMF (2 mV EMF), ∆f = 22.5 kHz, fmod = 1 kHz, and ꢁf Pilot = 6.75 kHz.
h. Vin = 66 dBµV EMF (2 mV EMF), ∆f = 100 kHz, fmod = 1 kHz, and ∆f Pilot = 6.75 kHz.
i. Vin = 66 dBµV EMF (2 mV EMF), ∆f = 22.5 kHz, and fmod = 1 kHz.
Broadcom®
October 15, 2014 • 4354-DS109-R
Page 139
BROADCOM CONFIDENTIAL
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