SI4770-77-A20 Datasheet, PDF (17/54 Pages) Silicon Laboratories – HIGH-PERFORMANCE CONSUMER ELECTRONICS

Si4770/77-A20
Signal Generator
50 
FMXIP
FMXIN
Si477x
Figure 5. FM Test Circuit for Mixer Input IP3 and Sensitivity Measurement
Table 8. AM Receiver Characteristics
(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
Input Frequency
Frequency Step
Resolution
Powerup Time^1,2
Tune Time¹
Seek Time/Channel¹
Maximum RF Input
Voltage^1,2
Image Rejection^1,3
Adjacent Channel
Rejection^1,3
Alternate Channel
Rejection^1,3
IP3^1,3
Test Condition
Min Typ Max
Unit
520 — 1710
kHz
1 — 10
kHz
RCLK or Crystal = 36.4 MHz, 37.8 MHz,
37.209375 MHz
At LOUT and ROUT pins
Mod = 90%, Fmod = 1 kHz, SINAD = 57 dB
— — 100
— 15 —
— 55 —
— 93 —
ms
ms
ms
dBµV
68 72 —
SINAD = 20 dB
57 62 —
Desired = 40 dBµV, F_MOD = 1 kHz, MOD = 30%
Undesired at ±9 kHz offset, F_MOD = 400 Hz,
MOD = 30%
SINAD = 20 dB
59 62 —
Desired = 40dBµV, F_MOD = 1 kHz, MOD = 30%
Undesired at ±18 kHz offset, F_MOD = 400 Hz,
MOD = 30%
Blockers at 40/80 kHz, AGC disabled (Max gain) 110 120 —
dB
dB
dB
dBµV
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.
Rev. 0.9
17