si4704 Silicon Laboratories, si4704 Datasheet - Page 13
si4704
Manufacturer Part Number
si4704
Description
Broadcast Fm Radio Receiver For Consumer Electronics
Manufacturer
Silicon Laboratories
Datasheet
1.SI4704.pdf
(36 pages)
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Table 9. FM Receiver Characteristics
(V
Parameter
Intermod Sensitivity
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 application note, “AN388: Si470x/1x/2x/3x/4x Evaluation Board Test
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. Analog audio output mode.
12. Blocker Amplitude = 100 dBµV
13. Sensitivity measured at (S+N)/N = 26 dB.
14. At temperature 25°C.
= 2.7 to 5.5 V, V
Procedure.” 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
– f
OUT
= 300 Hz to 15 kHz, A-weighted.
3,7,9
1
14
= 1 mV.
= 1 kHz, 75
| > 2 MHz,
and R
6
6
IO
3,6,12,13
OUT
= 1.85 to 3.6 V, T
f
0
µ
pins.
s de-emphasis, MONO = enabled, and L = R unless noted otherwise.
= 2 x f
6
6,10
1
6,10
– f
2
. AGC
A
= –20 to 85 °C)
Symbol
R
C
1,2
L
L
is disabled.
(Continued)
f = ±400 kHz, ±800 kHz
FM_DEEMPHASIS = 2
FM_DEEMPHASIS = 1
f = ±4 MHz, ±8 MHz
60 dBµV at RF Input
Input levels of 8 and
From powerdown
RCLK tolerance
Test Condition
Rev. 1.0
Single-ended
Single-ended
= 100 ppm
Min
70
45
10
–3
—
—
—
—
—
—
Si4704/05-C40
Typ
0.1
40
35
75
50
—
—
—
—
—
Max
110
0.5
50
—
—
80
54
—
60
3
ms/channel
dBµV
dBµV
Unit
k
ms
pF
dB
µs
µs
%
13