SI4770-77-A20 Datasheet, PDF (18/54 Pages) Silicon Laboratories – HIGH-PERFORMANCE CONSUMER ELECTRONICS

Si4770/77-A20
Table 8. AM 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, AM modulation = 30%, F_MOD = 1 kHz, RF level = 74 dBµV, and F_RF = 1 MHz unless otherwise specified)
Parameter
IP2^1,3
RF AGC Range
AGC Step Resolution
RF AGC Threshold
Accuracy⁴
IF AGC Threshold
Accuracy⁴
Sensitivity^1,3
THD^1,3
Audio SNR^1,3
Antenna Inductance³
Test Condition
Desired = 700 kHz,
Undesired = 1000 kHz, 1700 kHz
AGC disabled (Max gain)
Min Typ Max
142 146 —
Unit
dBµV
— 50 —
dB
2
dB
—2
—
dB
—2
—
dB
SINAD = 20 dB, AGC Disabled (Max RF Gain)
Mod = 30%
Mod = 90%
Mod = 30%
— 14
— 0.1
— 0.2
60 65
180 —
17 dBµV EMF
—
%
—
%
—
dB
540
µH
Audio Outputs: Pins LOUT and ROUT
Audio Output Resistance
Load⁴
10k — —
Audio Output
Capacitance Load⁴
Single Ended
— — 50
Audio Output Voltage
96 108 121
PSRR at Audio Output
Pins⁴
Ripple test should be for 100 Hz ripple on power — 45 —
supply lines
Ripple voltage = 100 mV_PP of power supply voltage
Notes:
1. Guaranteed by characterization.
2. Measured at T_AMB = 25 °C.
3. No A-weighting. Noise integrated from 30 Hz to 15 kHz for audio SINAD and SNR measurements.
4. Guaranteed by design.
Ω
pF
mVRMS
dB
18
Rev. 0.9