LA7566 Sanyo Semiconductor Corporation, LA7566 Datasheet
LA7566
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LA7566 Summary of contents
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... Ordering number : EN5764 VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL Overview The LA7566 is a VIF/SIF IC that supports PAL and NTSC multisound and that adopts a semi-adjustment-free system. To simplify adjustment, the VIF block adopts a technique in which AFT adjustment is no longer required by VCO adjustment. The SIF block supports audio multi- detection by adopting a PLL detection technique ...
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... FM detector output voltage AM rejection ratio Total harmonic distortion SIF S/N [SIF Switch Block] Switches A, B, and open ground NTSC mode 6-dB amplifier SIF crosstalk 21 SIF crosstalk 22 SIF crosstalk 23 SIF crosstalk 24 Switch threshold low-level voltage LA7566 Symbol Conditions 38.9 MHz CC Symbol Conditions ...
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... Pin Assignment Application Circuit Diagram Switch 5.5 MHz 6.0 MHz 6.5 MHz 4.5 MHz LA7566 H : OPEN L : GND No. 5764-3/11 ...
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... Internal Equivalent Circuit Diagram LA7566 No. 5764-4/11 ...
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... AC Characteristics Test Circuit Diagram Test Circuit Input Impedance Test Circuit (VIF and first SIF input impedance) LA7566 Impedance analyzer No. 5764-5/11 ...
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... To improve the low band (around 50 Hz) frequency characteristics, increase the value of this capacitor (C1). • VIF amplifier input. The input circuit is constructed as a balanced input, and the 5 input has the following impedance characteristics: VIF ≈ 1.5 kΩ C ≈ LA7566 Pin function Equivalent circuit Continued on next page. No. 5764-6/11 ...
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... AFT OUT resistor increases. The value of this resistor must not exceed 390 kΩ. This circuit includes a control function that controls the AFT voltage to be equal to the center voltage in weak field reception conditions. LA7566 Pin function Equivalent circuit Continued on next page. No. 5764-7/11 ...
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... When unlocked and during weak field reception, the VCO is controlled over the path B, thus increasing the loop 17 APC FILTER gain. We recommend values of 150 to 390 Ω, and C = 0.47 µF for the loop filter constants. LA7566 Pin function —— Equivalent circuit Continued on next page. No. 5764-8/11 ...
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... RF AGC operating point. Also, the FM output and the video output can be muted at the same time by setting this pin to the ground level. SIF IN (4.5 MHz) 21 SIF IN (5.5 MHz) 22 SIF IN (6.0 MHz SIF IN (6.5 MHz AGC LA7566 Pin function Switch 5.5 MHz 6.0 MHz 6.5 MHz 4.5 MHz ...
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... Tokyo Parts Industrial Co., Ltd. Picture SAW filters (split) TSF1137U SOUND SAW filters (inter) Tokyo Parts Industrial Co., Ltd. 236 Hinode Machi Isesaki Shi, Gunma Prefecture Japan TEL: +81-270-23-3731 LA7566 SAW filter characteristics The high-band is extended Frequency With the tuning set to the vicinity of S and ...
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... 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, 1998. Specifications and information herein are subject to change without notice. LA7566 PS No. 5764-11/11 ...