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STV2236 数据表(PDF) 28 Page - STMicroelectronics |
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STV2236 数据表(HTML) 28 Page - STMicroelectronics |
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28 / 86 page  STV224XH/228XH/223XH - ELECTRICAL CHARACTERISTICS 28/86 Note 1: Additional sinked current for large increasing steps of input signal when: - Voltage at PIFinput > Tuner AGC starting point adjustment given by the WR03(d5 to d0) - Output Signal (IntCVBSout) saturated (VIntCBVSoutVwth) in positive modulation. 4.4.5 Synchronous Video Demodulator Note 2: This parameter is not tested during production, it is tested during the qualification phase. 4.4.6 Demodulated Video Output (INTCVBSOUT Pin) Note 3: S/N = 20 log [PIFOUT Black to White / VNOISE(mVRMS) weighted CCIR 567. Note 4: Supply Voltage ripple rejection = 20log (VSUPPLY/VOUTPUT) measured at 100 Hz with VAC Max. = 100 mVpp ap- plied to VCC IF = 5 V. Symbol Parameter Test Conditions Min. Typ. Max. Unit DFPC Vision Carrier Capture Range ±2 MHz fVCO Maximum VCO Frequency for PIF regeneration With external LC network at 50 MHz (see Note 2) 50 MHz VILOCK PIF Input Signal for PIF PLL locking 40 70 µVRMS TVCO PIFVCO Temperature Coefficient ±20 ppm/K Symbol Parameter Test Conditions Min. Typ. Max. Unit PIFOUT-Q PIFOUT-I Video Amplitude at INTCVBSOUT Pin Black-to-White Video amplitude: reg 02 data = 10h (INTCVBSOUT =2 VPP) reg 02 data = 90h (INTCVBSOUT =2.3 VPP) 1.19 1.36 1.4 1.6 1.61 1.84 V BG/L BG to L Ratio Video amplitude bus register Typ.: reg 02 data = 10 hex 58 % DG Differential Gain 3 5 % DP Differential Phase 3 5 deg VPIF Residual Carrier Signal 1 10 mVRMS VR2IF Residual 2nd Harmonic 1 10 mVRMS S/N Video Output S/N Ratio See Note 3 55 60 dB VWTH White Noise Threshold Voltage reg 02 data = 90h 2.3 VPP at INTCVBSOUT Pin 6.7 V VWIL White Noise Insertion Level reg 02 data = 90h 2.3 VPP at INTCVBSOUT Pin 3.7 V VBTH Black Noise Threshold Voltage reg 02 data = 90h 2.3 VPP at INTCVBSOUT Pin 1V VBIL Black Noise Insertion Level reg 02 data = 90h 2.3 VPP at INTCVBSOUT Pin 2.6 V BW Video Bandwidth 6 8 10 MHz LUMLIN Luminance Non Linearity 5 % ROUT Internal Output Resistance 50 W RLOAD Output Load Resistance reg 02 data = 10hex (INTCVBOUT = 2 VPP) 23 k W IVID Video Output Source Current reg 02 data = 90hex (INTCVBSOUT = 2.3 VPP) 710 13 mA DCOUT DC Output Level Top Sync Level 2 V Inter Mod. 1.07 MHz Intermodulation Intercarrier Mode 52 dB PSRR Power Supply Ripple Rejection Video signal Grey level (see Note 4) BG standard L standard 35 30 dB NH Suppression of Video signals har- monics 35 40 dB |
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