SI4704 Datasheet, PDF (13/36 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 (Continued)
(V_DD = 2.7 to 5.5 V, V_IO = 1.85 to 3.6 V, T_A = –20 to 85 °C)
Parameter
Intermod Sensitivity^3,6,12,13
Audio THD^3,7,9
De-emphasis Time Constant⁶
Symbol
Test Condition
Min Typ Max
Unit
f = ±400 kHz, ±800 kHz —
40
—
dBµV
f = ±4 MHz, ±8 MHz —
35
—
dBµV
—
0.1
0.5
%
FM_DEEMPHASIS = 2 70
75
80
µs
FM_DEEMPHASIS = 1 45
Audio Output Load Resistance^6,10
R_L
Audio Output Load Capacitance^{6,10 C}_L
Seek/Tune Time⁶
Single-ended
10
Single-ended
—
RCLK tolerance
—
= 100 ppm
Powerup Time⁶
From powerdown
—
RSSI Offset¹⁴
Input levels of 8 and
–3
60 dBµV at RF Input
50
54
µs
—
—
k
—
50
pF
—
60 ms/channel
—
110
ms
—
3
dB
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.
Rev. 1.0
13