SI4704 Datasheet, PDF (12/36 Pages) Silicon Laboratories – Worldwide FM band support (64-108 MHz) integrated antenna support EN55020 compliant

Si4704/05-C40
Table 9. FM Receiver Characteristics^1,2
(V_DD = 2.7 to 5.5 V, V_IO = 1.85 to 3.6 V, T_A = –20 to 85 °C)
Parameter
Symbol
Test Condition
Min Typ Max
Unit
Input Frequency
f_RF
Sensitivity with Headphone
Network^3,4,5
Sensitivity with 50  Network^3,4,5,6
RDS Sensitivity⁶
LPI Sensitivity⁶
LNA Input Resistance^6,7
LNA Input Capacitance^6,7
Input IP3^6,8
AM Suppression^3,4,6,7
Adjacent Channel Selectivity
Alternate Channel Selectivity
Spurious Response Rejection⁶
Audio Output Voltage^3,4,7
Audio Output L/R Imbalance^3,7,9
Audio Frequency Response Low⁶
Audio Frequency Response High⁶
Audio Stereo Separation^7,9
Audio Mono S/N^3,4,5,7,10
Audio Stereo S/N^{4,5,6,7,10,11}
Blocking Sensitivity^3,6,12,13
(S+N)/N = 26 dB
(S+N)/N = 26 dB
f = 2 kHz,
RDS BLER < 5%
m = 0.3
±200 kHz
±400 kHz
In-band
–3 dB
–3 dB
f = ±400 kHz
f = ±4 MHz
76
—
108
MHz
—
2.2
3.5 µV EMF
—
1.1
— µV EMF
—
15
— µV EMF
—
3.5
3
4
4
5
100 105
40
50
35
50
60
70
35
—
72
80
—
—
—
—
15
—
32
42
55
63
—
58
—
32
—
38
— µV EMF
5
k
6
pF
— dBµV EMF
—
dB
—
dB
—
dB
—
dB
90
mV_RMS
1
dB
30
Hz
—
kHz
—
dB
—
dB
—
dB
—
dBµV
—
dBµV
Notes:
1. Additional testing information is available in application note, “AN388: Si470x/1x/2x/3x/4x Evaluation Board Test
Procedure.” Volume = maximum for all tests. Tested at RF = 98.1 MHz.
2. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Si47xx Antenna, Schematic,
Layout, and Design Guidelines” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
3. F_MOD = 1 kHz, 75 µs de-emphasis, MONO = enabled, and L = R unless noted otherwise.
4. f = 22.5 kHz.
5. B_AF = 300 Hz to 15 kHz, A-weighted.
6. Guaranteed by characterization.
7. V_EMF = 1 mV.
8. |f₂ – f₁| > 2 MHz, f₀ = 2 x f₁ – f₂. AGC is disabled.
9. f = 75 kHz.
10. At L_OUT and R_OUT pins.
11. Analog audio output mode.
12. Blocker Amplitude = 100 dBµV
13. Sensitivity measured at (S+N)/N = 26 dB.
14. At temperature 25°C.
12
Rev. 1.0