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PDF LA75503V Data sheet ( Hoja de datos )
| Número de pieza | LA75503V | |
| Descripción | Adjustment Free VIF/SIF Signal Processing IC | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENN6804
Monolithic Linear IC
LA75503V
Adjustment Free VIF/SIF Signal Processing IC
for PAL TV/VCR
Overview
The LA75503V is an adjustment free VIF/SIF signal
processing IC for PAL TV/VCR.
It supports 38 MHz, 38.9 MHz, and 39.5 MHz as the IF
frequencies, as well as PAL sound multi-system (M/N,
B/G, I, D/K), and contains an on-chip sound carrier trap
and sound carrier BPF. To adjust the VCO circuit, AFT
circuit, and sound filter, 4-MHz external crystal or 4-MHz
external signal is needed.
Functions
• VIF amplifier
• VCO adjustment free PLL detection circuit
• Digital AFT circuit
• RF AGC
• Buzz canceller
• Equalizer amplifier
• Internal sound carrier BPF
• Internal sound carrier trap
• PLL-FM detector
• Reference oscillation circuit
Features
• Internal VCO adjustment free circuit eliminating need
for VCO coil adjustments.
• Internal sound carrier BPF and sound carrier trap enable
easy configuration of PAL sound multi-system at low
cost.
• Considerably reduces the number of required peripheral
parts.
• Use of digital AFT eliminates problem of AFT
tolerance.
• Package: SSOP30 (275 mil)
Package Dimensions
unit: mm
3191A-SSOP30 (275 mil)
[LA75503V]
SANYO: SSOP30 (275 mil)
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 maximum ratings, operating condition ranges, or other
www.DatapSarhameeetetr4s)Ulis.cteod min 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, 110-8534 JAPAN
41301RM (OT) No. 6804-1/15
1 page  
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LA75503V
Test Circuit
Input Impedance Measuring Circuit (VIF, First SIF input impedance)
Impedance analyzer
VIF INPUT 1st SIF INPUT
+
100 µF
VCC
15 kΩ
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LA75503V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
*: 0.01 µF in case of unspecified capacitor
Top view
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No. 6804-5/15
5 Page 
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Continued from preceding page.
Pin No.
Pin
LA75503V
Pin Function
Internal Circuit
Internal filters (i.e. sound carrier BPF and sound
carrier trap) are tuned using the capacitor
FILTER CONTROL connected to pin 25.
25
CAPACITOR
A value between 0.47 µF and 1 µF is considered
desirable taking video S/N, and AM and PM noise
into consideration.
26 NC Not connected
Pin 27 is the SIF PLL filter pin.
Normally use the following values.
R: 3 kΩ
C1: 0.01 µF
C2: 1000 pF
27 SIF PLL FILTER
A large R value (6 kΩ or lower) results in high-pass
FM detection output noise. A smaller R value
results in low-pass noise.
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Continued on next page.
No. 6804-11/15
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet LA75503V.PDF ] | |
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