SI4840-A10 Datasheet, PDF (8/26 Pages) Silicon Laboratories – BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER

Si4840/44-A10
Table 5. FM Receiver Characteristics^1,2
(V_DD = 2.7 to 3.6 V, TA = –15 to 85 °C)
Parameter
Input Frequency
Sensitivity with Headphone
Network³
LNA Input Resistance^4,5
LNA Input Capacitance^4,5
Symbol
f_RF
Test Condition
(S+N)/N = 26 dB
Min Typ Max ^Unit
64
—
109
MHz
—
2.2
— µV EMF
—
4
—
k
—
5
—
pF
AM Suppression^4,5,6,7
Input IP3^4,8
m = 0.3
—
50
—
dB
—
105
— dBµV EMF
Adjacent Channel Selectivity⁴
Alternate Channel Selectivity⁴
Audio Output Voltage^5,6,7,12
Audio Mono S/N^5,6,7,9,10
Audio Stereo S/N^3,4,5,7,9,10
Audio Frequency Response Low⁴
Audio Frequency Response High⁴
Audio Stereo Separation^5,11
Audio THD^5,6,11
Audio Output Load Resistance^4,10
R_L
Audio Output Load Capacitance^{4,10 C}L
Powerup/Band Switch Time⁴
±200 kHz
±400 kHz
–3 dB
–3 dB
Single-ended
Single-ended
—
50
—
dB
—
65
—
dB
—
80
—
mV_RMS
—
55
—
dB
—
55
—
dB
—
—
30
Hz
15
—
—
kHz
—
40
—
dB
—
0.1
0.5
%
10
—
—
k
—
—
50
pF
—
—
110
ms
Notes:
1. Additional testing information is available in “AN603: Si4840/44 DEMO 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 “AN602: Si484x-A Antenna, Schematic,
Layout, and Design Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
3. Frequency is 64~109 MHz.
4. Guaranteed by characterization.
5. V_EMF = 1 mV.
6. F_MOD = 1 kHz, MONO, and L = R unless noted otherwise.
7. f = 22.5 kHz.
8. |f₂ – f₁| > 2 MHz, f₀ = 2 x f₁ – f₂.
9. B_AF = 300 Hz to 15 kHz, A-weighted.
10. At L_OUT and R_OUT pins.
11. f = 75 kHz.
12. Tested in Digital Volume Mode.
8
Rev.1.0