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TDA8722 Folha de dados(PDF) 10 Page - NXP Semiconductors |
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TDA8722 Folha de dados(HTML) 10 Page - NXP Semiconductors |
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10 / 28 page  1998 Jun 23 10 Philips Semiconductors Product specification I2C-bus programmable modulator for negative video modulation and FM sound TDA8722 CHARACTERISTICS VDDA =VDDD =5V; Tamb =25 °C; valid over the whole UHF band; measured in circuit of Fig.7; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply IDD supply current normal mode 41 52 63 mA RF off test mode 30 38 46 mA Video characteristics I19 input current (AC) V19 = 3.2 V − 0.5 2.0 µA z19 video input impedance V19 = 3.2 V 30 −− k Ω m modulation depth V19 = 500 mV (p-p) EBU colour bars; R17 = 120 k Ω; see Fig.7 77 82 87 % during clipping condition; note 1 85 − 98 % TPSG mode; R17 = 120 k Ω 72 82 92 % balance test mode; R17 = 120 k Ω 110 −− % ∆m modulation depth range V19 = 500 mV (p-p) EBU colour bars; 47 k Ω≤ R17 ≤∞ 65 − 90 % ∆m APL variation of modulation depth with change of APL between 10 and 90% referenced to the value for APL = 50%; V19 = 500 mV (p-p) −2 − +2 % Vclip(p-p) video input level where clipping starts (peak-to-peak value) video level on pin 19; note 2 − 0.56 − V S/N video video signal-to-noise ratio fRF < 700 MHz; note 3 48 52 − dB fRF > 700 MHz; note 3 46 50 − dB Gdiff differential gain note 4 −8 − +8 % φ diff differential phase note 4 −8 − +8 deg V/S video-to-sync ratio V19 = 500 mV (p-p); V/S = 7/3 6.9/3.1 7/3 7.1/2.9 fvideo frequency response for the video signal note 5 −1 − +1 dB Audio characteristics (for PAL G standard; audio subcarrier at 5.5 MHz) Z1 audio input impedance 30 −− k Ω δm modulation deviation f1 = 400 Hz; V1 = 0.5 V (RMS) before pre-emphasis filter 20 25 30 kHz δmmax maximum modulation deviation f1 = 400 Hz; V1 = 2.0 V (RMS) before pre-emphasis filter 60 85 − kHz THD total harmonic distortion f1 = 1 kHz; V1 = 0.5 V (RMS) before pre-emphasis filter − 0.4 1.5 % |
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