si4704 Silicon Laboratories, si4704 Datasheet - Page 14

• Manufacturer Part Number: si4704
• Description: Broadcast Fm Radio Receiver For Consumer Electronics
• Manufacturer: Silicon Laboratories

Si4704/05-C40
Table 10. 64–75.9 MHz Input Frequency FM Receiver Characteristics
(V
14
Parameter
Input Frequency
Sensitivity with Headphone
Network
LNA Input Resistance
LNA Input Capacitance
Input IP3
AM Suppression
Adjacent Channel Selectivity
Alternate Channel Selectivity
Audio Output Voltage
Audio Output L/R Imbalance
Audio Frequency Response Low
Audio Frequency Response High
Audio Mono S/N
Audio THD
De-emphasis Time Constant
Audio Output Load Resistance
Audio Output Load Capacitance
Seek/Tune Time
Powerup Time
RSSI Offset
Notes:
DD
1. Additional testing information is available in “AN388: Si470x/1x/2x/3x/4x Evaluation Board Test Procedure.”
2. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Si47xx Antenna, Schematic,
3. F
4. f = 22.5 kHz.
5. B
6. Guaranteed by characterization.
7. V
8. |f
9. f = 75 kHz.
10. At L
11. At temperature (25 °C).
= 2.7 to 5.5 V, V
Volume = maximum for all tests. Tested at RF = 98.1 MHz.
Layout, and Design Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
2
MOD
AF
EMF
3,4,5
8
– f
OUT
= 300 Hz to 15 kHz, A-weighted.
3,7,9
1
11
= 1 mV.
= 1 kHz, 75
| > 2 MHz,
and R
3,4,5,7,10
3,4,7
IO
OUT
= 1.85 to 3.6 V, T
3,4,7
7
f
0
µ
7
pins.
s de-emphasis, MONO = enabled, and L = R unless noted otherwise.
= 2 x f
3,7,9
10
1
10
– f
2
. AGC
A
= –20 to 85 °C)
Symbol
f
R
C
RF
L
L
is disabled.
FM_DEEMPHASIS = 2
FM_DEEMPHASIS = 1
Input levels of 8 and
From powerdown
(S+N)/N = 26 dB
RCLK tolerance
Test Condition
Rev. 1.0
60 dBµV EMF
Single-ended
Single-ended
= 100 ppm
±200 kHz
±400 kHz
m = 0.3
–3 dB
–3 dB
Min
100
64
40
72
15
55
70
45
10
–3
—
—
—
—
—
—
—
—
—
3
4
1,2,6
Typ
105
4.0
0.1
50
50
70
80
63
75
50
—
—
—
—
—
—
—
—
—
4
5
Max
75.9
110
0.5
90
30
80
54
50
60
—
—
—
—
—
—
—
—
5
6
1
3
ms/channel
dBµV EMF
µV EMF
mV
MHz
Unit
kHz
k
dB
Hz
k
ms
pF
dB
dB
dB
dB
pF
dB
µs
µs
%
RMS