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STV223X 数据表(PDF) 30 Page - STMicroelectronics |
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STV223X 数据表(HTML) 30 Page - STMicroelectronics |
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30 / 86 page ![]() STV224XH/228XH/223XH - ELECTRICAL CHARACTERISTICS 30/86 4.4.12 AM Demodulator 4.4.13 SIF Output (AM/FM or Sound Subcarriers Output) 4.4.14 SAW Filter Switch Output (TQFP64 only) 4.4.15 External Audio Input 4.4.16 Main Audio Output (See Figure 17 on page 42 and Figure 18 on page 42) Symbol Parameter Test Conditions Min. Typ. Max. Unit AFOUT AM Audio Output Amplitude at AM/ FMOUT Pin 54% modulation 400 500 630 mVRMS AMlowco Low Cut-off Frequency -3 dB compared AFout 40 Hz AMhighco High Cut-off Frequency -3 dB compared AFout 30 kHz AMthd Total Harmonic Distortion 54% modulation 2 % AMs/n Signal/Noise Ratio Weighted according to CCIR468-4 Quasi-Peak 55 dB AMsvr Supply Voltage Rejection See Note 4 20 dB Symbol Parameter Test Conditions Min. Typ. Max. Unit SIFout Output Level Sound subcarriers 150 mVRMS SIFbw Bandwidth Sound subcarriers 7.5 MHz SIF dcout DC Output Level 4 V SIFres Residual Carrier Fundamental wave (38.9 MHz) and harmonics 0.4 mVRMS SIFcur Sink Output Current AM or FM demod. output selected Sound subcarriers output selected 0.5 1.5 mA Symbol Parameter Test Conditions Min. Typ Max. Unit SAW low Low Output Voltage ISINK = 2 mA 0.4 V SAWcur Maximum allowed Current 2 mA SAW high High Output Voltage ISOURCE = 2 mA 4 V Symbol Parameter Test Conditions Min. Typ. Max. Unit RIN Input Resistance 70 100 130 k W VIDC DC Input Voltage 2.4 V AFIN maximum Audio Input Signal 2 VRMS Symbol Parameter Test Conditions Min. Typ. Max. Unit AMax Maximum Attenuation (Audio Out/ AM-FM Out) Register 05hex, data = 7Fhex 78 dB AMin Minimum Attenuation (Audio Out/ AM-FM Out) VIN = 1 VRMS, f = 1 kHz, Register 05hex, data = 00hex -101 dB ASTEP Step Resolution reg 05, d7 = 0 0.7 dB DCSH DC Output Shift From max. volume to min. volume 50 mV VODC DC Output Level 4 V AFDIFF Audio Amplitude difference between sources f = 1 kHz, fM = ±27 kHz, Ext. Audio Input = 500 mVRMS 2dB ROUT Output Resistance 110 W BWO Output Bandwidth 1 MHz THD_AM Total Harmonic Distortion VIN = 1 VRMS, f = 1 kHz 0.1 0.3 % |
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