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TDA8722 Datasheet(PDF) 11 Page - NXP Semiconductors |
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TDA8722 Datasheet(HTML) 11 Page - NXP Semiconductors |
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11 / 28 page  1998 Jun 23 11 Philips Semiconductors Product specification I2C-bus programmable modulator for negative video modulation and FM sound TDA8722 S/N audio audio signal-to-noise ratio note 6 45 50 − dB faudio frequency response of the audio signal note 7 −1 − +1 dB P/S picture-to-sound ratio no audio signal; FM = 5.5 MHz; C17 =15pF −16 −13 −10 dB ∆P/S picture-to-sound ratio range no audio signal; FM = 5.5 MHz; 0pF ≤ C17 ≤ 39 pF −18 −−10 dB Channel characteristics fRF RF frequency range using tank circuit of Fig.7 471.25 − 855.25 MHz VRF output level on RFA and RFB asymmetrical output loaded with 75 Ω; f = 471.25 to 855.25 MHz 77 80 83 dB µV ∆V RF difference between the level of modulated carrier and the level of the unmodulated carrier measurement is made during synchronization pulse for the modulated carrier 012dB SPO spurious outside channel note 8 −−62 − dBc RFsh RF second harmonic level on asymmetrical output fRF = 471.25 MHz −−30 −25 dBc fRF = 855.25 MHz −−20 −15 dBc SCsh sound carrier second harmonic level fs = 5.5 MHz; C17 = 15 pF; fRF < 700 MHz −−65 −60 dBc fs = 5.5 MHz; C17 = 15 pF; fRF > 700 MHz −−63 −58 dBc SCth sound carrier third harmonic level fs = 5.5 MHz; C17 = 15 pF −−65 −60 dBc video signal harmonics note 9 −−60 −55 dBc fref reference frequency spurious fp + 31.25 kHz −−65 −60 dBc IM chrominance beat note 10 −−65 −60 dBc Charge pump output (CP) I8 output current −±100 −µA V7 output voltage in lock 1.5 − 2.5 V IOZ OFF-state leakage current VCP = 2 V; T0 = 1; T1 = 1; T2 = 1 −− 10 nA Amplifier output (AMP) G amplifier current gain VCP =2V; IAMP =10 µA − 4000 − V7sat output saturation voltage VCP = 0 V; T0 = 1; T1 = 0; T2 = 1 − 140 200 mV Crystal oscillator characteristics (XTAL) Z9 oscillator input impedance −−−500 Ω SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT |
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