unit:mm 3149-DIP48S
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1 Ordering number:enn3343a Monolithic Linear IC LA7680, 7681 Sigle-Chip Signal Processor for Color T Use Overview The LA7680 and LA7681 signal processors provide all the components required to decode PAL or NTSC Color television signals. On-chip circuits include IF, SIF, a video processor, a chroma demodulator, and deflection drivers. The self-adjusting signal processors support vertical field scanning rates of both 0 and 60z, allowing the LA7837 and LA7838 vertical output drivers to maintain a constant picture height. The LA7681 replaces the LA7680 s G-Y output at pin 22 with a color contrast signal for input to a SECAM chroma demodulator. This contrast signal is fixed at the imum. The LA7680/7681 is available in 48-pin shrink DIPs. Features Minimized external components. 48-pin shrink DIP. IF/SIF igh-gain IF amplifier. Fast-response automatic gain control (AGC). No delay between audio input and output. Muting for both audio and video signals or for audio alone. ideo processor On-chip two-dimensional differential circuit. ariable current transfer. 7Mz bandwidth. Chroma demodulator PAL and NTSC system compatible. Optimized demodulation angles and ratios. igh performance burst cleaning filter and ACC/killer detector. On-chip tint circuit (NTSC only). Deflection drivers Adjustment-free vertical or horizontal synchronization. Two-stage automatic frequency control. Adjustable separation sensitivity for vertical synchronization. Fixed picture height for both PAL and NTSC. Fixed picture height. Package Dimensions unit:mm 3149-DIP48S [LA7680, 7681] min 2 SANYO : DIP48S Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as imum ratings, operating condition ranges,or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, JAPAN 30801TN (KT)/3293TS/6290TA KI , 6403 No /10
2 Specifications Maximum Ratings at Ta = 2 Parameter Symbol Recommended Operating Conditions at Ta = 2 LA7680, 7681 Conditions Input voltage Input current I2 16 ma Allowable power dissipation Pd Ta 6 3 W Operating Characteristics at Ta = 2, CC = 13 = 11 =9, I CC =I 2 =13mA Ratings FBP input current I26 ma I24 10 ma FBP input voltage 26 min Operating temperature Storage temperature Topr Tstg 10 to +6 to +10 Supply voltage Parameter Symbol Supply current I Operating voltage range Operating current range I [Supply characteristics] Parameter Conditions Ratings ma 13 op 8 to op 8 to 10 2 op 10 to 16 ma Symbol Conditions orizontal supply voltage Supply current I ma [IF characteristics] fp=38.9mz ideo output voltage 42 With no inputs AFT output voltage 44 With no inputs Maximum RF AGC voltage 46 CW=8µ, RF AGC, R=min Minimum RF AGC voltage 46L CW=8µ, RF AGC, R= Input sensitivity i IF input level generating 8p-p video output with 40% modulation µ AGC range Maximum input GR i i=80µ, AM=78% MOD p-p ideo output amplitude O4 2 Differential gain DG Differential phase ideo signal-to-noise ratio DP S/ N min Ratings typ Unit Unit Maximum input (o=8p-p), less input sensitivity IF input level generating +1 video output µ i=80µ, 87.% video MOD % i=80µ, 87.% video MOD (p-p) i=80µ, 20log 47 3 noise (rms) Sync signal tip level 4 2TIP CW=80µ Frequency characteristic fc Frequency generating 3 video output 7 10 Mz IF intermodulation I Mz/ 1.07Mz, i=80µ 3 42 Maximum AFT output voltage 44 CW=80µ, over a range of frequencies Minimum AFT output voltage 44L CW=80µ, over a range of frequencies AFT detector sensitivity Sf CW=80µ, over a range of frequencies m/kz A FT defeat switching voltage AFT S W B lack noise threshold BT [SIF characteristics] fs=.mz SIF limiting voltage ilim Measured at sweep signal 0. 0 Measured at sweep signal 2 8 SIF input level generating 3 video output 4 2 µ FM detector output voltage O 1 i=100µ, f=±30kz mrms FM detector output distortion T D i=100µ, f=±30kz % AM rejection AF amplifier voltage gain FM : f=30kz A MR i=100µ 43 6 AM : 30% G AF Maximum AF amplifier output voltage O Maximum attenuation for electronically variable resistors ATT i=100mrms, f=400z Output level distortion generating 10% AF amplifier output Unit 0 8 rms i=200mrms, f=400z Continued on next page. No /10
3 Continued from preceding page. [ideo characteristics] Parameter Symbol Conditions p-p ideo softener range Soft f=2mz, 100mp-p, voltage at video tone variable resistor, 4 to 0 ideo sharpener range Sharp f=2mz, 100mp-p, voltage at video tone variable resistor, 4 to 9 f=100kz, 100mp-p, voltage at contrast variable ideo voltage gain G resistor 9, voltage at video tone variabel resistor 4 C ontrast control center setting C CE N f=100kz, 100mp-p, voltage at contrast variable resistor 6 Contrast control range C f=100kz, 100mp-p, voltage at contrast variable resistor 3 to 9 Brightness control BR BrCEN BR L min Ratings typ Unit oltage at brightness variable resistor 2. 8 oltage at brightness variable resistor oltage at brightness variable resistor 7 2 oltage at contrast variable resistor 6, voltage at ideo frequency characteristic f video tone variable resistor 4, 3 down Direct current transfer rate [PAL/NTSC chroma characteristics] R DC 7 Mz 200mp-p staircase input % Demodulator output carrier leakage voltage m 30 mp-p Color control chrominance residue E C min oltage at color variable resistor 0, voltage at color contrast variable resistor 9 LA7680 color contrast range C C oltage at color variable resistor B-Y=p-p, voltage at contrast variable resistor : 3 to 9 LA7681 Color contrast output voltage cout oltage at color variable resistor 4., voltage at contrast variable resistor 6 D emodulator output DC voltage C- Y For burst signals only. oltage at color variable resistor 0 D emodulator output DC voltage difference C- Y For burst signals only. oltage at color variable resistor 0 Ecar 3 p-p APC pull-in range fapc ± 00 z [PAL chroma characteristics] Contrast control center setting p-p ACC amplitude characteristic Demodulator ouput ratios EC cen ACCM1p ACCM2p oltage at color variable resistor :4. (LA7680). oltage at contrast variable resistor : 6 (LA7681) 0 0 p-p B /Rp ( Common to both LA7680 and LA7681) G /Rp With no B-Y signal (LA7680 only) G /Bp With no R-Y signal (LA7680 only) Demodulation angle RBp Maximum chrominance output 0 0 p-p Maximum demodulator output p-p Killer trigger point [NTSC chroma characteristics] Contrast control center setting p-p ACC amplitude characteristic ACC phase characteristic Ech Ec oltage at color variable resistor contrast variable resistor 9 oltage at color variable resistor contrast variable resistor 9 9, voltage at 9, voltage at Ekonp Ec cenn Tint control center setting TCEN Tint range Demodulator output ratio Demodulator angle oltage at color variable resistor 4. (LA7680) oltage a contrast variable resistor 6 (LA7681) 7 1 p-p ACCM1N ACCM2N ACCP1N ACCP2N T oltage at tint variable resistor 4. oltage at color variable resistor 4. oltage at contrast variable resistor 6 oltage at tint variable resistor 0 to 4. to 9 oltage at color variable resitor 4. oltage at contrast variabel resistor R/B N G/B N ( LA7680) RB N GB N ( LA7680) Killer trigger point EKONN oltage at color variable resistor 9, voltage at Maximum demodulator output EcN p-p contrast variable resistor 9 ±40 Continued on next page. No /10
4 Continued from preceding page. Parameter [Deflection characteristics] Symbol Conditions Synchronization separator input voltage SDC ertical free-running frequency (0z) Tfree0 31 ertical free-running frequency (60z) Tfree60 26 Maximum vertical synchronization frequency (0z) T 0 With horizontal synchronization signal only 37 Maximum vertical synchronization frequency (60z) Minimum vertical synchronization frequency (60z) Minimum vertical synchronization frequency (0z) T 60 min Ratings typ With horizontal synchronization signal only 297 T min60 22 T min0 269 ertical blanking pulse level BL ertical blanking pulse width (0z) PWBLK0 2 ertical blanking pulse width (60z) PWBLK ertical ouput pulse width PW OUT 8. OUT ertical ouput voltage OUT M OUT L 3 errtical deflection external trigger load impedance R TR 3. 6 kω ertical deflection automatic synchronization cutoff voltage ertical output pulse CC starting level orizontal free-running frequency deviation orizontal free running frequency dependence on CC orizontal pull-in range orizontal output pulse CC starting level AFC 2 FBP peak level CR switch input level SAS 9 4 S 4 f Deviation from 1.680kz z fcc 2 = 6.6 (reference value) 2 z f PULL Deviation from 1.680kz ± 40 z S 4. 3 FBP CR 3 0 orizontal output pulse width PWOUT µ s PF 12 µ s orizontal output pulse phase PCEN µ s PR 0 µ s Burst gate pulse width PWBGP µ s Burst gate pulse phase TGP µ s orizontal synchronization detector, threshold level coin /60z, output voltage 0/60z, input voltage in in0 1 Unit No /10
5 Block Diagram : PAL/NTSC System No.3343 /10
6 Sample Application Circuit : PAL/NTSC System No /10
7 PAL Multi-sound System PAL Multi-sound System No /10
8 U.S. Multi-sound System Sound Input/Output No /10
9 PAL/SECAM Chroma Demodulator Interface Note : The LA7680 may be used with the transcode type of SECAM chroma demodulators. No /10
10 Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. owever, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of March, 200 Specifications and information herein are subject to change without notice. PS No /10
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