SI4704 Datasheet, PDF (14/36 Pages) Silicon Laboratories – Worldwide FM band support (64-108 MHz) integrated antenna support EN55020 compliant

Si4704/05-C40
Table 10. 64–75.9 MHz Input Frequency FM Receiver Characteristics^1,2,6
(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
Sensitivity with Headphone
Network^3,4,5
LNA Input Resistance⁷
LNA Input Capacitance⁷
Input IP3⁸
AM Suppression^3,4,7
Adjacent Channel Selectivity
Alternate Channel Selectivity
Audio Output Voltage^3,4,7
Audio Output L/R Imbalance^3,7,9
Audio Frequency Response Low
Audio Frequency Response High
Audio Mono S/N^3,4,5,7,10
Audio THD^3,7,9
De-emphasis Time Constant
Audio Output Load Resistance¹⁰
Audio Output Load Capacitance¹⁰
Seek/Tune Time
f_RF
64
(S+N)/N = 26 dB
—
3
4
100
m = 0.3
40
±200 kHz
—
±400 kHz
—
72
—
–3 dB
—
–3 dB
15
55
—
FM_DEEMPHASIS = 2 70
FM_DEEMPHASIS = 1 45
R_L
Single-ended
10
C_L
Single-ended
—
RCLK tolerance
—
= 100 ppm
—
75.9
MHz
4.0
— µV EMF
4
5
k
5
6
pF
105
— dBµV EMF
50
—
dB
50
—
dB
70
—
dB
80
90
mV_RMS
—
1
dB
—
30
Hz
—
—
kHz
63
—
dB
0.1
0.5
%
75
80
µs
50
54
µs
—
—
k
—
50
pF
—
60 ms/channel
Powerup Time
RSSI Offset¹¹
From powerdown
—
—
110
ms
Input levels of 8 and –3
—
3
dB
60 dBµV EMF
Notes:
1. Additional testing information is available in “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. At temperature (25 °C).
14
Rev. 1.0