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TDA7514 数据表(PDF) 5 Page - STMicroelectronics |
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TDA7514 数据表(HTML) 5 Page - STMicroelectronics |
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5 / 74 page  5/74 TDA7514 3 ELECTRICAL CHARACTERISTCS 3.1 FM (Vcc = 8.5V; Tamb= 25°C; Vant,in= 60dBµload; fc=98.1MHz; fdev = 40kHz; fmod=1KHz; IF1amp1=25dB; IF1amp2=15dB; Filter @TUNEROUT:IEC_TUNER+Deemphasis=50 µs, unless otherwise specified) Table 3. Symbol Parameter Test Condition Min Typ Max Unit General (measured at audioprocessor output with de-emphasis and high cut active, ISS set to 80 KHz BW) US Usable sensitivity S/N=40dB 0 dB µVload SNR Signal to Noise ratio 65 dB LS Limiting Sensitivity -3dB_point, SoftMute Off -2.5 dB µVload THD Total Harmonic Distortion fdev = 40kHz 0.26 % fdev = 75kHz 0.36 % Vout Output Level @TUNEROUT 243 mVrms ISN Interstation Noise Delta Vout@RF OFF, Soft Mute OFF -8.5 dB IFCS IF Counter Sensitivity 0 dB µVload Icctun DC Supply Current@TUNVCC 80 mA Iccmix1 DC Supply Current@IFT1 5 mA Iccif1 DC Supply Current@IF1VCC 10 mA Iccosc DC Supply Current@OSCVCC 10 mA Iccpll DC Supply Current@PLLVCC 3 mA Iccdig DC Supply Current@DIGVCC 7 mA IQ Mixer 1 RIN Input Resistance Differential 6 k Ω VIN Input DC Bias @pin 8, pin 10 2.3 V Gm Transconductance 17 mS IIP3 Input IP3 108 dB µV IQG IQ Gain Adjustment -1 +1 % IQP IQ Phase Adjustment -7 +8 °C IRR Image Rejection Ratio without adjustment 30 dB adjusted 42 dB Gvmix1 Gain from input (single-ended) to IFT1 out differential 22 dB IFT1 Adjustment Cift1min IFT1 Adjustment Capacitor Minimum Between MIX1OUT+ and MIX1OUT- 2.3 pF |
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