cxa1785ar Sony Electronics, cxa1785ar Datasheet
cxa1785ar
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cxa1785ar Summary of contents
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... RGB Decoder/Driver For the availability of this product, please contact the sales office. Description The CXA1785AR is an RGB decoder/driver designed to drive LCD panels. This IC converts composite video signals, Y/C signals and Y/color difference signals into RGB signals used for driving LCDs. Features • Both NTSC/PAL compatible • ...
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... SHIFT IDENT EXT F/F REG3 SYNC P N REG2 N HPF COLOR KILLER ACC COMP Y/C PAL —2— CXA1785AR OUT VREF DET INV 22 G OUT INV DET INV 20 R OUT DET ...
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... V EE GND GND —3— CXA1785AR (The pin voltage 4.5 V) CC1 Description Trap connection. Leave this pin open other than when composite video input is selected. Outputs the video signal to be input to the sync separation circuit. Composite video signal input (Y signal when using Y/C input and Y/color difference input) ...
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... V EE GND —4— CXA1785AR Description Color adjustment. The ampli- tude of color difference signal is adjusted when Y/color difference input. Burst cleaning coil is con- nected for PAL. Leave this pin open other than when PAL mode is selected. Killer detection filter is con- nected ...
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... EE GND GND EE —5— CXA1785AR Description Color adjusted and burst taken out chroma signal is output. Color phase adjustment pin. Also doubles as the NTSC, PAL or Y/color difference switch. PAL is selected when this pin is connected to GND; Y/color difference is selected when this pin is connected to Vcc1 ...
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... V GND GND EE —6— CXA1785AR Description Smoothing capacitor con- nection for the feedback circuit of RGB output DC level control . Use a low-leakage capacitor because this pin has high impedance. RGB primary color signal output. Power supply connection for RGB output. ...
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... GND GND —7— CXA1785AR Description Adjusts voltage gain change point 1. Output 1 Input Adjusts voltage gain change point 2 and the peak limiter that operates above 2.This pin is preset internally. Peak limiter Output Input RGB output brightness adjust- ment ...
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... GND —8— CXA1785AR Description High level input when synchro- nized; low level at all other times. The rising edge of the input pulse must precede the falling edge of the SYNC OUT pulse. For PAL, the internal flip flop switches at the rising edge of the input pulse ...
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... GND GND —9— CXA1785AR Description Power supply connection. Connect a resistance between this pin and GND; the outflow current value adjusts the internal filters. Connect 18 k for both NTSC and PAL. The following conditions apply to the resistance connected: Allowable difference in resistance: ± ...
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... Input SG2 (100 kHz) to (A) and adjust V42 so that the amplitude of the sine wave at TP22 is 0 Gp3 and Gp4 are the P-P amount of change in the output amplitude at TP22 when SG2 is 2.4 MHz and V48 = 2 V and 3 V. —10— CXA1785AR a, SW8 a, SW9 b, Min. Typ. Max. Unit ...
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... A2 SW5 a Input SG5 (0 dB, +6 dB, -25 dB), (burst/ chroma phase = 180°) to (B). Measure the output amplitude at TP12, labeling the output corresponding and - V0, V1 and V2, respectively 20log(V1/V0 20log(V2/V0 —11— CXA1785AR Min. Typ. Max. Unit 14.0 17.0 1.0 3 ...
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... TP8 less by changing the burst frequency. SW13 a Input SG5 (0 dB) to (B). Measure the difference between 4.433619 MHz and the input frequency at which the voltage at TP8 less by changing the burst frequency. —12— CXA1785AR Min. Typ. Max. Unit 0 2.0 - 10.0 - 5 ...
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... Input SG5 (0 dB) to (B) and change the chroma phase. R: Phase in which output amplitude at TP20 reaches a maximum G: Phase in which output amplitude at TP22 reaches a maximum B: Phase in which output amplitude at TP24 reaches a maximum – – B —13— CXA1785AR Min. Typ. Max. Unit - ...
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... V5. Measure the voltage at which the output at TP12 appeares. Input SG5 (0 dB, 3.579545 MHz, burst/ chroma phase = 180°) to (B) and gradually lower the voltage V13. Measure the voltage of V13 at which the output at TP24 ceases. —14— CXA1785AR Min. Typ. Max. Unit 80 90 ...
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... Measure the output (black-black) at TP20, TP22, and TP24. No input for (A) and (B). V32 = 2.8 V Measure the output (black-black) at TP20, TP22, and TP24. (When the phase is different from the case of V32 = 2.1 V, make the value negative.) —15— CXA1785AR Min. Typ. Max. Unit ...
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... TP20, TP22 and TP24. Input SG8 (-11 dB) to (A). While increasing the voltage at (C), measure the voltage at which the output reverses at TP20, TP22, and TP24. —16— CXA1785AR Min. Typ. Max. Unit ±1.0 ±2 ...
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... SW5 a, SW20, SW22, SW24 ON Input SG4 to (A). Adjust V42 and set the amplitude (white - black) at TP20, TP22, and TP24 and measure the rise time tpLH2 and fall time tpHL2. —17— CXA1785AR Min. Typ. Max. Unit 1.0 1.2 1.4 2.0 2.2 2 ...
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... No input for (A) and (B). V32 = 2.3 V Measure the difference in the output amplitude (black - black) at TP20, TP22, and TP24 when SW26 OFF and when SW26 with V26 = 3.0 V. —18— CXA1785AR Min. Typ. Max. Unit ON 200 300 400 ...
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... Z28 Z31 Z34 Z35 Z39 Z40 Z41 I5 V5=GND I6 V6=3.5V I13 V13=4.0V I13 V13=GND I29 V29=GND I30 V30=GND I32 V32=2.5V I36 V36=GND I42 V42=3.0V I48 V48=3.0V —19— CXA1785AR a, SW8 a, SW9 b, Min. Typ. Max. Unit 27.0 35.0 24.0 32.0 mA 3.0 4.3 1.0 12.0 3.6 2 100 100 100 4.0 6.0 0.3 1.0 ...
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... Sine wave; amplitude 150 mV SG3 SG4 Chroma signal SG5 Waveform APL10% 0.357V APL50% 0.179V APL90% 0.357V 0.175V , frequency variable P-P 0.357V 10µsec 1H Burst amplitude 150 mV , chroma amplitude 150 mV P-P Burst, chroma frequency (3.579545 MHz, 4.433619 MHz) Chroma phase variable —20— CXA1785AR 0.143V 0.03V 0.143V P-P 0.15V ...
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... Synchronization with the horizontal sync signal SG11 FRP pulse tr, tf<50ns 2.5µs Waveform 0.15V 1H 1H 0.143V Video input sync signal 0V External sync signal amplitude variable 0V 5µs 64µs 0.357V 1H 5µs Horizontal sync signal 63.5µs 4.5V 0V Horizontal sync signal 5µs —21— CXA1785AR 0.15V 0.143V 0.357V 0.143V 4.5V 0V ...
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... SG NO. SG12 Switching Characteristics Timing chart Input waveform Output waveform Waveform 10µs Amplitude variable Horizontal sync signal Syncronization with the horizontal sync signal 50% t PHL 90% 90% 50% t TLH —22— CXA1785AR 4. PLH 50% 10% t THL ...
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... TP8 a b TP2 a 5 Vcc1 a b (A) (B) SW12A (I) (J) ±200 ppm —23— CXA1785AR VEE Vcc2 100µ 1µ TP24 24 100 SW24 100p 23 0.068µ 22 TP22 100 SW22 100p 21 0.068µ 20 TP20 100 SW20 100p 19 0.068µ ...
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... The characteristics can be changed to those shown in Fig adjusting Pin 30 those shown in Fig adjusting Pin 31. The peak limiter function is linked to point B. White peak limit Output B A Fig. 1 Output B’ A’ GAMMA1 adjustment Input Input Fig. 2 —24— CXA1785AR Output B’ GAMMA2 adjustment Input Fig. 3 ...
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... If the SUB BRIGHT (Pins 27 and 28) and the SUB CONTRAST (Pins 34 and 35) are left at their preset states and no white balance adjustment is made in the liquid crystal display system, the white balance may be lost due to slight variations in the electronic components in this system. Therefore recommended that some type of white balance adjustment always be made. Center voltage —25— CXA1785AR ...
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... VIDEO IN. 39k • When using Y/C input: Input the Y signal to VIDEO IN and the C signal to C 39k IN. In this case, the TRAP for Pin 1 is not needed. VIDEO ±200 ppm —26— CXA1785AR 4.5V 12V GND 1 1µ 100µ 25 100 B output 24 0.068µ ...
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... VIDEO IN. 39k 0.1µ • When using Y/C input: VIDEO IN Input the Y signal to VIDEO IN and the C signal IN. In this case, the TRAP for Pin 1 is not needed. ±200 ppm —27— CXA1785AR 4.5V 12V GND 1 1µ 100µ 100 B Output 24 0.068µ ...
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... R-Y IN B-Y IN 22k 39k 39k Y IN ±200 ppm —28— CXA1785AR 4.5V 12V GND 1 1µ 100µ 100 B output 24 0.068µ 23 100 G output 22 0.068µ 21 100 R output 20 0.068µ ...
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... SONY CODE EIAJ CODE JEDEC CODE 48PIN LQFP (PLASTIC) 9.0 ± 0.3 7.0 ± 0 0.2 ± 0.06 0.08 M 0° to 10° 0.1 PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT LQFP-48P-L111 LQFP048-P-0707-AP LEAD MATERIAL PACKAGE WEIGHT —29— CXA1785AR 0.1 ± 0.1 DETAIL A EPOXY RESIN SOLDER PLATING 42 ALLOY 0.2g ...