SI4825-A10 Datasheet, PDF (6/21 Pages) Silicon Laboratories – BROADCAST MECHANICAL TUNING AM/FM/SW RADIO RECEIVER

Si4825-A10
Table 4. FM Receiver Characteristics^1,2
(V_DD = 2.7 to 3.6 V, TA = 0 to 70 °C)
Parameter
Symbol
Test Condition
Min Typ Max
Unit
Input Frequency
Sensitivity with Headphone
Network³
LNA Input Resistance^4,5
f_RF
64
—
109
MHz
(S+N)/N = 26 dB
—
4.0
—
µV EMF
—
4
—
k
LNA Input Capacitance^4,5
—
5
—
pF
AM Suppression^4,5,6,7
Input IP3^4,8
m = 0.3
—
50
—
dB
—
105
— dBµV EMF
Adjacent Channel Selectivity⁴
±200 kHz
—
45
—
dB
Alternate Channel Selectivity⁴
±400 kHz
—
60
—
dB
Audio Output Voltage^5,6,7
—
72
—
mV_RMS
Audio Mono S/N^5,6,7,9,10
—
45
—
dB
Audio Frequency Response Low⁴
–3 dB
—
—
30
Hz
Audio Frequency Response High⁴
–3 dB
15
—
—
kHz
Audio THD^6,5,11
—
0.1
0.5
%
Audio Output Load Resistance^4,10
R_L
Single-ended
10
—
—
k
Audio Output Load Capacitance^{4,10 C}L
Single-ended
—
—
50
pF
Notes:
1. Additional testing information is available in “AN569: Si4831/35/36/20/24/25-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 “AN738: Si4825/36-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 A_OUT pin.
11. f = 75 kHz.
6
Rev. 1.0