Data Sheet
Si4702/03-C19
Rev. 1.1 13
Mono/Stereo Switching Level
3,8,12
BLNDADJ = 10
10 dB stereo separation
—34—dBµVEMF
Audio Mono S/N
3,4,5,6,9
55 60 — dB
Audio Stereo S/N
3,5,6,8
BLNDADJ = 10 — 58 — dB
Audio THD
3,4,9,12
—0.10.5 %
De-emphasis Time Constant
13
DE = 0 70 75 80 µs
DE = 1 45 50 54 µs
Audio Common Mode Voltage
14
ENABLE = 1 0.65 0.8 0.9 V
Audio Common Mode Voltage
14
ENABLE = 0
AHIZEN = 1
—0.5xV
IO
—V
Audio Output Load Resistance
8,14
R
L
Single-ended 10 — — k
Audio Output Load Capacitance
8,14
C
L
Single-ended — — 50 pF
Seek/Tune Time
8,11
SPACE[1:0] = 0x, RCLK
tolerance = 200 ppm,
(x = 0 or 1)
——60ms/
channel
Powerup Time
15
From powerdown
(Write ENABLE bit to 1)
——110ms
RSSI Offset
16
Input levels of 8 and
60 dBµV at RF input
–3 — 3 dB
Table 8. FM Receiver Characteristics
1,2
(Continued)
(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
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 headphone matching network.
8. Guaranteed by characterization.
9. V
EMF
=1mV.
10. |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 23.
11. The channel spacing is selected with the SPACE[1:0] bits. Refer to "6. Register Descriptions" on page 23. Seek/Tune
timing is guaranteed for 100 and 200 kHz channel spacing.
12. f = 75 kHz.
13. The de-emphasis time constant is selected with the DE bit. Refer to "6. Register Descriptions" on page 23.
14. At LOUT and ROUT pins.
15. Do not enable STC interrupts before the powerup time is complete. If STC interrupts are enabled before the powerup
time is complete, an interrupt will be generated within the powerup interval when the initial default tune operation is
complete. See "AN230: Si4700/01/02/03 Programmer’s Guide" for more information.
16. Minimum and maximum at room temperature (25 °C).