Si4703-B17
10 Confidential Rev. 1.0
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Table 7. FM Receiver Characteristics
1,2
(V
D
= V
A
= 2.7 to 5.5 V, V
IO
= 1.5 to 3.6 V, T
A
= –20 to 85 °C)
Parameter
Symbol Test Condition Min Typ Max Unit
Input Frequency f
RF
76 — 108 MHz
Sensitivity
3,4,5,6,7
(S+N)/N = 26 dB — 2.2 3.5 µVEMF
RDS Sensitivity
8
f = 2 kHz,
RDS BLER < 5%
—15—µVEMF
RDS Sensitivity in Performance
Mode
8,9
f = 2 kHz,
RDS BLER < 5%
RDSPRF = 1
—12—µVEMF
LNA Input Resistance
8,10
345k
LNA Input Capacitance
8,10
456pF
Input IP3
8,11
104 108 — dBµVEMF
AM Suppression
3,4,5,8,10
m = 0.3 40 55 — dB
Adjacent Channel Selectivity
±200 kHz 35 50 — dB
Alternate Channel Selectivity
±400 kHz 60 70 — dB
Spurious Response Rejection
8
In-band 35 — — dB
RCLK Frequency
— 32.768 — kHz
RCLK Frequency Tolerance
12
SPACE[1:0] = 00 or 01 –200 — 200 ppm
SPACE[1:0] = 10 –50 — 50
Audio Output Voltage
3,4,5,10
72 80 90 mV
RMS
Audio Output L/R Imbalance
3,4,10,13
—— 1 dB
Audio Band Limits
3,4,8,10
±1.5 dB 30 — 15 k Hz
Notes:
1. Additional testing information is available in Application Note AN234. Volume = maximum for all tests.
2. Important Note: To ensure proper operation and FM receiver performance, follow the guidelines in “AN231: Si4700/
01/02/03 Headphone and Antenna Interface.” Silicon Laboratories will evaluate schematics and layouts for qualified
customers.
3. F
MOD
= 1 kHz, 75 µs de-emphasis
4. MONO = 1, and L = R unless noted otherwise.
5. f = 22.5 kHz.
6. B
AF
= 300 Hz to 15 kHz, A-weighted.
7. Typical sensitivity with matching network.
8. Guaranteed by characterization.
9. RDS high-performance mode enabled RDSPRF 06h[9] = 1. Refer to 6. "Register Descriptions" on page 20.
10. Measured at V
EMF
=1mV, f
RF
= 76 to 108 MHz.
11. |f
2
– f
1
| > 1 MHz, f
0
=2xf
1
– f
2
. AGC is disabled by setting AGCD = 1. Refer to "6. Register Descriptions" on page
20.
12. The channel spacing is selected with the SPACE[1:0] bits. Refer to "6. Register Descriptions" on page 20. Seek/Tune
timing is guaranteed for 100 and 200 kHz channel spacing.
13. f = 75 kHz.
14. The de-emphasis time constant is selected with the DE bit. Refer to "6. Register Descriptions" on page 20.
15. At LOUT and ROUT pins.
16. Min and Max at room temperature (25 C°).
