AN5637AN5637, Serwisówki TV, Układy Scalone
[ Pobierz całość w formacie PDF ]
ICs for TV AN5637 SECAM decoder IC Overview The AN5637 is a chroma signal processing circuit for use in SECAM system. It outputs the color dif- ference signal. Unit : mm 19.2±0.3 16 9 Features · Built-in bell filter, deemphasis circuit · One point adjustment · Small number of external components 1 8 Applications · SECAM system TV 7.62±0.25 (0.71) 2.54 0.5±0.1 1.22±0.25 Seating plane DIP016-P-0300D 1 n n n Limiter Amp. B V V Inversion H.VBLK generation 15 16 IH FF SCP In C-In ACC Amp. Bell Filter B Limiter Amp. B Current shift (VBLK,BGP,Signal) V B ID discrimination Reset pulse generation BGP generation ACC Det. Amp. V/I conversion B Internal discrimination SECAM/Non-SECAM V VBLK generation External discrimination ID/f ref 1 Limiter Amp. Phase Det. Loop Filter V/I conversion SECAM/Non-SECAM ICO 14 N.C. Output Filter R-Y Amp. V 13 De-Emp. Band Gap N.C. 12 N.C. Output Filter B-Y Amp. ICs for TV AN5637 n Pin Descriptions Pin No. Description Pin No. Description 1 Reference frequency signal/ Ident input pin 8 PLL filter automatic adjustment sample hold pin 2 Bell filter output monitor pin 9 - (R-Y) output pin 3 Power supply pin 10 - (B-Y) output pin 4 Black level adjustment voltage input pin 11 Killer voltage monitor pin 5 Black level adjustment reference voltage output pin 12 N.C. 13 N.C. 6 Grounding pin 14 N.C. 7 Bell filter automatic adjustment sample hold pin 15 Sand castle pulse input pin 16 SECAM signal input pin n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage V CC 11.0 V Supply current I CC 73 mA Power dissipation * 2 P D 777 mW Operating ambient temperature * 1 T opr -20 to +70 °C Storage temperature * 1 T stg -55 to +150 °C Note) * 1 :T a = 25 °C except operating ambient temperature and storage temperature. * 2 : Power dissipation of the package at T a = 70 °C. n Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 7.2 to 9.9 V n Electrical Characteristics at V CC = 9 V, T a = 25 ° C Parameter Symbol Conditions Min Typ Max Unit Power supply Supply current I 3 Current when V CC = 9 V 30 40 50 A Pin voltage V 5 Voltage when V CC = 9 V 2.9 3.2 3.5 V 3 AN5637 ICs for TV n Electrical Characteristics at V CC = 9 V, T a = 25 ° C (continued) Parameter Symbol Conditions Min Typ Max Unit Input(Pin16) Typical input : (Pin16) Color bar signal, (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Input dynamic range V DR16 Composite signal input amplitude ¾ 1.0 1.5 V range Chroma signal input amplitude * 1 V ch.16 Chroma signal input amplitude range ¾¾300 mV[p-p] Input impedance Z 16 DC measurement 17 25 33 kW Bell filter Typical input : (Pin16) 4.0 MHz to 4.6 MHz sine wave 10 mV[p-p], (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Bell adjusting voltage V ADB Sample hold pin voltage at bell 2.8 3.9 5 V filter automatic adjustement Center frequency f OB Center frequency of bell filter 4.202 4.262 4.322 MHz (Signal period) Band width B Band width of bell filter 250 310 370 kHz (Signal period) ACC Typical input : (Pin16) Color bar signal (Composite) 1 V[p-p], (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period ACC characteristics 1 ACC1 Output change amount when -6 0 6 % discrimination signal changes from 150 mV[p-p] to 300 mV[p-p] ACC characteristics 2 ACC2 Output change amount when -6 0 6 % discrimination signal changes from 150 mV[p-p] to 15 mV[p-p] Demodulator/Output Typical input : (Pin16) Color bar signal (Composite) 1 V[p-p], (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period PLL adjusting voltage V ADV Sample hold pin voltage at PLL 3.1 3.7 4.3 V automatic adjustement R-Y output amplitude V RY Color bar (Composite) signal input 0.85 1.00 1.15 V[p-p] (1 V[p-p]) B-Y output amplitude V BY Color bar (Composite) signal input 1.07 1.27 1.47 V[p-p] (1 V[p-p]) Detector output linearity L O Color bar (Composite) signal input -6 0 6 % (1 V[p-p]) R-Y/B-Y output ratio (R-Y)(B-Y) Amplitude ratio of V RY and V BY 1.12 1.27 1.42 Times Black level adjusting voltage * 2 V AD4 Pin4 voltage when difference of 1.45 2.1 2.75 V B-Y black level becomes 0 Black level error (R-Y) * 2 f BER Value referred to input frequency ¾¾10 kHz Note) * 1 : Refer to "Explanations of testing method 1" * 2 : Refer to "Explanations of testing method 2" 4 ICs for TV AN5637 n Electrical Characteristics at V CC = 9 V, T a = 25 ° C (continued) Parameter Symbol Conditions Min Typ Max Unit Demodulator/Output (continued) Typical input : (Pin16) Color bar signal (Composite) 1 V[p-p], (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Blanking period V BLK Stable sine wave is necessary 2.2 2.7 3.2 V output DC voltage in V period (4.4336 MHz) SN ratio * 3 S/N Amplitude ratio when 30 ¾¾dB Deviation = 460 kHz/0 kHz (Pin10 measurement) Residual high frequency amplitude V RH Harmonic content with 100 % ¾¾10 mV[p-p] white signal input (Pin10 measurement) Output impedance Z OS9 DC measurement, Pin1 = 5 V 260 460 660 W (when SECAM) Pin9 Output impedance Z ON9 DC measurement, Pin1 = 1.5 V 1 ¾¾MW (when non SECAM) Pin9 Output impedance Z OS10 DC measurement, Pin1 = 5 V 260 460 660 W (when SECAM) Pin10 Output impedance Z ON10 DC measurement, Pin1 = 1.5 V 1 ¾¾MW (when non SECAM) Pin10 Sand castle pulse Typical input : (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Horizontal and vertical BLK level * 4 V BL Measurement of slice level of H, 0.5 1 1.5 V V blanking pulse Burst gate level * 5 V BG Measurement of slice level of 3.4 3.9 4.4 V burst gate pulse Reference signal/interface Typical input : (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Reference signal amplitude V ref Amplitude range of sine wave 0.20 ¾ 0.50 V[p-p] (4.43362 MHz) of Pin1 input System SW discrimination level V SS Voltage when Pin10 becomes 2.5 3.0 3.5 V open if Pin1 is 5 V to 1 V variable IDENT Typical input : (Pin16) Color bar signal (Chroma), (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Color On/Off hysteresis H C Difference between color turn On 0.5 2 6 dB or Off and Off to On level Killer sensitivity K Color turn Off level when disc- ¾¾32 dB rimination signal changes 150 mV[p-p] to 0 mV[p-p] Note) * 3 : Refer to "Explanations of testing method 3" * 4 : Refer to "Explanations of testing method 4" * 5 : Refer to "Explanations of testing method 5" 5 [ Pobierz całość w formacie PDF ] |
Podobne
|