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LA7425

Sanyo
Part Number LA7425
Manufacturer Sanyo
Description NTSC Format Single-Chip Signal Processing IC
Published Apr 25, 2005
Detailed Description Ordering number : EN5110 Monolithic Linear IC LA7425 NTSC Format Single-Chip Signal Processing IC for VHS VCR Products ...
Datasheet PDF File LA7425 PDF File

LA7425
LA7425

Overview
Ordering number : EN5110 Monolithic Linear IC LA7425 NTSC Format Single-Chip Signal Processing IC for VHS VCR Products Overview The LA7425 is a single-chip video signal processing IC for use in VHS format VCR products.
The number of required adjustments has been reduced to a single adjustment by IC chip internal trimming.
The incorporation of a playback equalizer and other circuits on chip provides a significant reduction in external components and thus significantly reduces the cost of manufacturing the signal processing printed circuit board.
This product can also support simplified S-VHS playback, which is becoming a standard feature in VCR products in the Japanese market.
Features • Only one adjustment point (comb filter phase adjustment) (The AGC, carrier, deviation and PB-Y level are adjustment free.
) (If an LA7411/16 is used as the head amplifier, the Y/C record current will also be adjustment free.
) • Simplified S-VHS playback support — Built-in S-VHS discrimination circuit — Built-in equalizer switch — Automatic demodulator gain switching — Internal automatic de-emphasis characteristics switching • Only a minimal number of external components required (85 components: This corresponds to a 38% reduction over previous Sanyo products .
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CNR and SQPB not handled, and REC EQ not included.
) Components newly incorporated on chip: — Playback equalizer (include chroma trap), limiter balance filter, capacitor and resistor for detail enhancer, record chroma 7.
8 MHz trap, playback chroma LPF, ACC filter • High performance/multifunctionality Linear phase type picture controller Double high-pass noise canceller, high-speed AFC, DCC New built-in functions — FM AGC, synchronization detection circuit, linear control circuit for high-pass noise canceller, playback mode Y/C separator output, chroma noise canceller • Single CCD system The LA7425 supports the following functions with the addition of only a single CCD (1H delay) device: comb filter, YNR, DOC and chroma cross...


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