SI4770-77-A20 Datasheet, PDF (16/54 Pages) Silicon Laboratories – HIGH-PERFORMANCE CONSUMER ELECTRONICS

Si4770/77-A20
Table 7. FM Receiver Characteristics (Continued)
(T_AMB = –40 to 85 °C, V_A = 4.5 to 5.5 V, V_D = 2.7 to 3.6 V, V_IO1 = 1.7 to 3.6 V, V_IO2 = 1.2 to 3.6 V. Typical values measured at
T_AMB = 25 °C, FM modulation (L = R), F_MOD = 1 kHz, F_DEV = 22.5 kHz, Deemphasis = 75 µsec, RF level = 60 dBµV, and
F_RF = 98 MHz in application circuit unless otherwise specified)
Parameter
Test Condition
Min Typ Max
Unit
FM MPX Output: Pins MPXOUT
Output Voltage¹
F_RF = 83 MHz, RF level = 65 dBµV,
F_DEV = 3 kHz, F_MOD = 76 kHz
unless otherwise noted
14
16
— mVRMS
Output Load
Resistance³
—
10
—
k
Output Load
Capacitance³
—
50
—
pF
PSRR³
Bandwidth¹
100 Hz ripple on power supply lines.
Ripple voltage = 100 mV_PP of power supply volt- —
45
—
dB
age
110
—
—
kHz
Following FM MPX Specifications Refer to Si4770/77-A20 Application Circuit
(S+N)/N^1,11
F_RF = 83 MHz, RF level = 65 dBµV,
F_DEV = 3 kHz, F_MOD = 76 kHz
unless otherwise noted
25
30
—
dB
Sensitivity^1,11
F_RF = 83 MHz, F_DEV = 3 kHz, F_MOD = 76 kHz
unless otherwise noted,
—
19
25
dBµV
SINAD = 5 dB
Notes:
1. Guaranteed by characterization.
2. Measured at T_AMB = 25 °C.
3. Guaranteed by design.
4. IP3 measured at the FMXIP and FMXIN pins reflects IP3 for mixer stage and all subsequent downstream blocks.
5. Refer to FM test circuit in Figure 5.
6. No A-weighting. Noise integrated from 30 Hz to 15 kHz for audio SINAD and SNR measurements.
7. Input resistance is software configurable.
8. IP3 measured at the FMI input pin reflects IP3 for FMI LNA stage.
9. RDS Synchronization Persistence is the minimum RF level at which the tuner loses synchronization to the RDS PI code
as the RF level decreases from high to low levels.
10. RDS Synchronization Stability is the minimum RF level at which the tuner achieves synchronization to the RDS PI code
as the RF level increases from low to high levels.
11. Noise integrated from 30 Hz to 120 kHz for audio SINAD and SNR measurements.
16
Rev. 0.9