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PDF LA7567NM Data sheet ( Hoja de datos )
| Número de pieza | LA7567NM | |
| Descripción | TV and VCR VIF/SIF IF Signal-Processing Circuit with PAL/NTSC Multi-Format Audio Support | |
| Fabricantes | Sanyo | |
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Ordering number : EN5765
Monolithic Linear IC
LA7567N, 7567NM
TV and VCR VIF/SIF IF Signal-Processing Circuit with
PAL/NTSC Multi-Format Audio Support
Overview
The LA7567N and LA7567NM are PAL/NTSC multi-
format audio VIF/SIF IF ICs that adopt a semi-
adjustment-free system. The VIF block adopts a technique
that makes AFT adjustment unnecessary by adjusting the
VCO, thus simplifying the adjustment steps in the
manufacturing process. PLL detection is adopted in the
FM detector to support multi-format audio detection. A
built-in SIF converter is included to simplify multi-format
system designs. A 5-V power-supply voltage is used to
match that used in most multimedia systems. In addition,
these ICs also include a buzz canceller to suppress Nyquist
buzz and provide high audio quality.
Functions
[VIF]
• VIF amplifier • PLL detector • BNC • RF AGC
• EQ amplifier • AFT • IF AGC • Buzz canceller
[First SIF]
• First SIF • First SIF detector • AGC
[SIF]
• Multi-format SIF converter • Limiter amplifier • PLL
FM detector
Package Dimensions
unit: mm
3067-DIP24S
[LA7567N]
unit: mm
3112-MFP24S
[LA7567NM]
SANYO: DIP24S
Features
• Both AFT and SIF inductors built in, thus making
adjustment of external inductance unnecessary.
• A PAL/NTSC multi-format audio system can be
constructed easily.
• Built-in buzz canceller for excellent audio performance.
• VCC = 5 V, low power dissipation (250 mW)
Specifications
Maximum Ratings at Ta = 25°C
SANYO: MFP24S
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
Circuit voltage
VCC max
V13, V17
I6
6V
VCC
V
–3 mA
Circuit current
I10
–10 mA
I24 –2 mA
Allowable power dissipation
Pd max
TA ≤ 50°C, Independent IC [LA7567NM]
*: Mounted on a printed circuit board
TA ≤ 70°C, Independent IC [LA7567N]
420 mW
720 mW
500 mW
Operating temperature
Topr
–20 to +70
°C
Storage temperature
Tstg
–55 to +150
°C
Note: When mounted on a 65 × 72 × 1.6 mm paper/phenolic resin printed circuit board.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
50698RM (OT) No. 5765-1/14
1 page  
Application Circuit Diagrams
PAL SPLIT
LA7567N, 7567NM
NT (US) SPLIT
No. 5765-5/14
5 Page 
Continued from preceding page.
Pin No.
Pin
LA7567N, 7567NM
Description
• First SIF AGC filter connection.
This IC adopts an average value AGC technique. The first
SIF conversion gain is about 30 dB, and the AGC range is
over 50 dB. A 0.01 µF capacitor is normally used in filter
16
1st SIF AGC FILTER
connected to this pin.
• When used in an intercarrier system:
Connect this pin (pin 16) to ground. The IC internal switch
will operate to connect the intercarrier output to the SIF
converter input.
Equivalent circuit
• IF AGC filter connection
The signal peak-detected by the built-in AGC detector is
converted to the AGC voltage at pin 17. Additionally, a
17
IF AGC FILTER
second AGC filter (a lag-lead filter) used to create the dual
time constants is provided internally in the IC.
Use a 0.022-µF capacitor as the external capacitor, and
adjust the value according to the sag, AGC speed, and
other characteristics.
• VIF amplifier input.
18
19
VIF input
The input circuit is a balanced circuit, and the input circuit
constants are:
R ≈ 1.5 kΩ
C ≈ 3 pF
20 GND
Continued on next page.
No. 5765-11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LA7567NM.PDF ] | |
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