BA7071F-E2

Multimedia ICs SYNC separator IC with AFC BA7071F The BA7071F contains a video synchronization separation circuit, a vertical video synchronization separation circuit, a horizontal oscillation circuit, and a phase comparator. It separates and outputs the horizontal and vertical synchronization signals (HD and VD), and the composite synchronization signal (Sync-out) from input video or composite synchronization signals. The phase difference between HD and VD is guaranteed for both the rising and falling edges of VD. Applications •TVs, VCRs and camcorders •1)Features Built in AFC circuit. 4) Horizontal free-run frequency does not require adjustment. 5) Low external parts count. 6) SOP 8-pin package. 2) HD and VD phase difference guaranteed. 3) Wide supply voltage range (3V to 7V). •Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Symbol Limits Unit VCC 8.0 V mW Pd 350∗ Operating temperature Topr – 20 ~ + 75 °C Storage temperature Tstg – 55 ~ + 125 °C Power dissipation ∗ Reduced by 3.5mW for each increase in Ta of 1°C over 25°C. •Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol Min. Typ. Max. Unit VCC 2.85 — 7.5 V 1 Multimedia ICs BA7071F •Block diagram VIN 1 HD - OUT 2 GND 3 PD - OUT 4 SYNC SEPA Vsepa PD COMP •Pin descriptions 2 Pin No. Pin name 1 VIN Video input 2 HD - OUT HD output 3 GND Function GND 4 PD - OUT Phase comparator output 5 HOSC - R Horizontal oscillator resistor 6 VCC 7 VD - OUT 8 Sync - OUT Power supply (VCC) VD output Synchronization signal output VCO 8 Sync - OUT 7 VD - OUT 6 VCC 5 HOSC - R Multimedia ICs BA7071F •Input / output circuits VIN VCC HOSC - R HD - OUT VCC VCC 1pin 5pin 2pin VD - OUT PD - OUT Sync - OUT VCC VCC VCC 7pin •Electrical characteristics (unless otherwise noted Ta = 25°C and V Parameter Quiescent current Minimum SYNC separation level 8pin 4pin CC = 5.0V) Symbol Min. Typ. Max. Unit IQ 3.0 Vsyn-min — 5.8 8.6 0.08 0.15 mA Conditions pin 8 open VP-P pin 1 terminated with 75Ω resistor Pulse voltage low Vp-L — 0.1 0.3 V pins 2, 7 Pulse voltage high Vp-H 4.7 5.0 — V pins 2, 7 (Horizontal) free-running frequency fH.O 13.5 15.7 17.9 kHz No input signal ∆fCAP 2.3 2.7 — kHz Lock-in phase THPH 0.6 1.6 2.6 µs pin 2 pin – 1 HD, VD phase deviation 1 THVD1 19.0 24.0 29.0 µs pin 7 pin – 2 (FLD1) HD, VD phase deviation 2 THVD2 19.0 24.0 29.0 µs pin 7 pin – 2 (FLD1) Capture range — HD pulse width THD 9.0 10.0 11.0 µs pin 2 VD pulse width TVD 249 254 259 µs pin 7 VIN, VD phase difference TINVD 41.0 48.0 55.0 µs pin 1 pin – 7 3 Multimedia ICs BA7071F •Measurement circuit (application example) VIDEO IN VCC R4 20kΩ 1µF + 1 C1 SYNC SEPA SYNC OUT 8 VD OUT HD OUT 2 7 Vsepa VCC 6 3 + C4 C5 0.47µF 4 VCC + 0.47µ PD COMP 0.022µF 5 VCO R3 VCC = 3V, 10kΩ VCC = 5V, 18kΩ + 220kΩ R2 C3 2200pF 0.47µ R1 100kΩ When SYNC SEPA output only is used. HD and VD unused. VCC VIDEO IN + R4 20kΩ 1µF 1 C1 SYNC SEPA SYNC OUT 8 Vsepa 2 7 VCC 3 6 + C4 0.47µF 4 PD COMP VCO 5 R1 Fig. 1 (1) Connect a 100kΩ resistor between pin 5 and ground. Leave pins 2, 4 and 7 open. (2) SYNC OUT (pin 8) has positive output. (3) The SYNC OUT (pin 8) output rise delay times in relation to the VIDEO IN (pin 1) input signal Sync fall are as follws: 830 ns (reference value) ,when VCC = 5V 880 ns (reference value) ,when VCC = 3V (4) The SYNC OUT (pin 8) output fall delay times in relation to the VIDEO IN (pin 1) input signal Sync rise are as follws: 150 ns (reference value) ,when VCC = 5V 220 ns (reference value) ,when VCC = 3V 4 100kΩ C5 0.022µF Multimedia ICs BA7071F operation •(1)Circuit Synchronization separation circuit Detects the charging current to a externally-connected capacitor, and performs synchronization separation. (2) Horizontal oscillation circuit When a video signal is input, it is synchronized with Hsync by the PLL. The horizontal free-running frequency is determined by external resistor R1. fH • O = (3) Vertical synchronization separation circuit When a video signal is input, synchronization signal separation is done over the vertical synchronization pulse interval. 1.57E6 [kHz] R1 (4) VIN, HD, and VD timing charts Vertical synchronization pulse interval 1 / 2H NTSC signal Odd field (IN) VIN, VD phase difference NTSC signal Even field (IN) VD (OUT) HD, VD phase difference 1 HD, VD phase difference 2 HD Odd field (OUT) HD Even field (OUT) 1. The rise and fall positions for VD are basically the same for both odd and even fields. 2. HD shifts by 1 / 2H during the odd and even field interval. 3. Only the odd field is given for the specification. Fig. 2 Attached components •Resistor R should have a tolerance of ± 2%, and a 1 temperature coefficient of 100ppm or lower. 5 BA7071F 10 8 6 4 2 0 – 25 0 25 50 75 16.2 250 VCC = 5.0V 200 150 100 50 0 – 25 TEMPERATURE : Ta (°C) 0 25 50 Fig. 3 Quiescent current vs. temperature 10.0 9.8 9.6 25 50 75 HD · VD PULSE TIMING 2 : THDV2 (µs) 260 250 240 230 – 25 0 25 50 75 TEMPERATURE : T (°C) Fig. 6 HD pulse width vs. temperature Fig. 7 VD pulse width vs. temperature NTSC VCC = 5.0V 28 26 24 22 – 25 0 25 50 75 TEMPERATURE : Ta (°C) Fig. 9 HD, VD phase difference 2 vs. temperature 6 270 TEMPERATURE : Ta (°C) 30 20 0 15.6 15.4 15.2 – 25 0 25 50 75 Fig. 5 Horizontal free-running frequency vs. temperature 30 NTSC VCC = 5.0V VD PULSE WIDTH : TVD (µs) HD PULSE WIDTH : THD (µs) 10.2 0 15.8 TEMPERATURE : Ta (°C) 280 NTSC VCC = 5.0V – 25 16.0 Fig. 4 Minimum synchronization separation level vs. temperature 10.4 9.4 75 VCC = 5.0V TEMPERATURE : Ta (°C) HD · VD PULSE TIMING 1 : THDV1 (µs) QUIESCENT CURRENT : IQ (mA) VCC = 5.0V HORIZONTAL FREQUENCY : fH.O (kHz) •Electrical characteristic curves MINIMUM SYNC - SEPA LEVEL : Vsyn - Min. (VPP) Multimedia ICs NTSC VCC = 5.0V 28 26 24 22 20 0 – 25 0 25 50 75 TEMPERATURE : Ta (°C) Fig. 8 HD, VD phase difference 1 vs. temperature Multimedia ICs BA7071F •External dimensions (Units: mm) 1 4 0.11 1.27 0.15 ± 0.1 4.4 ± 0.2 5 1.5 ± 0.1 6.2 ± 0.3 5.0 ± 0.2 8 0.4 ± 0.1 0.3Min. 0.15 SOP8 7