LA7425 查看數據表（PDF） - SANYO -> Panasonic
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LA7425 Datasheet PDF : 7 Pages
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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 ... 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 crosstalk cancellation.
Thus the cost of external components is lowered.
• Full HQ support (YNR, CNR, detail enhancer and WCL
up)
Package Dimensions
unit: mm
3170-DIP36S
[LA7425]
SANYO: DIP36S
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
51595TH (OT) No. 5110-1/7
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