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PDF LA7567GM Data sheet ( Hoja de datos )
| Número de pieza | LA7567GM | |
| Descripción | TV and VCR VIF/SIF IF Signal-Processing Circuit | |
| Fabricantes | Sanyo Electric | |
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Ordering number : ENN6803
Monolithic Linear IC
LA7567GM
TV and VCR VIF/SIF IF Signal-Processing Circuit with
NTSC SPLIT Support
Overview
The LA7567GM is an NTSC SPLIT support VIF/SIF IF
IC that adopts 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. A 5-V power-
supply voltage is used to match that used in most
multimedia systems. In addition, this IC also includes 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
Specifications
Maximum Ratings at Ta = 25°C
Features
• Both AFT and SIF inductors built in, thus making
adjustment of external inductance unnecessary.
• Built-in buzz canceller for excellent audio performance.
• VCC = 5 V, low power dissipation (250 mW)
Package Dimensions
unit: mm
3112A-MFP24S
[LA7567GM]
24 13
1 12.5 12 0.15
0.35 1.0 (0.75)
SANYO: MFP24S
Parameter
Maximum supply voltage
Circuit voltage
Circuit current
Symbol
VCC max
V13, V17
I6
I10
I24
Conditions
Allowable power dissipation
Pd max
TA ≤ 50°C, Independent IC
*: Mounted on a printed circuit board
Operating temperature
Storage temperature
Topr
Tstg
Note: When mounted on a 65 × 72 × 1.6 mm paper/phenolic resin printed circuit board.
Ratings
6
VCC
–3
–10
–2
420
720
–20 to +70
–55 to +150
Unit
V
V
mA
mA
mA
mW
mW
°C
°C
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
parameters) listed in 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
D1401RM (OT) No. 6803-1/14
1 page  
LA7567GM
Application Circuit Diagrams
NT (US) SPLIT
AF OUT
7.5kΩ
+
IN PUT
TSF1241
SAW(P)
GND 1µH
1kΩ
SAW
(S)
9V
RF AGC
OUT
30kΩ
24 23 22 21 20 19 18 17 16 15 14 13
VIF 1st
FM
RF IF
AGC AGC
AMP
AGC AMP
DET
VIDEO
DET
1st
DET
AFT
LIM
AMP
MIX
HPF
HPF
HPF
EQ
AMP
VCO
1 2 3 4 5 6 7 8 9 10 11 12
++
BPF 330Ω
15µH
330Ω
JAPAN SPLIT
AF OUT
7.5kΩ
+
IN PUT
TSF1137
SAW(P)
GND
1kΩ
SAW
(S)
9V
RF AGC 30kΩ
OUT
24 23 22 21 20 19 18 17 16 15 14 13
VIF 1st
FM
RF IF
AGC AGC
AMP
AGC AMP
DET
VIDEO
DET
1st
DET
AFT
LIM
AMP
MIX
HPF
HPF
HPF
EQ
AMP
1 2 34 56 7 8
++
VCO
9 10 11 12
BPF 330Ω
15µH
330Ω
AFT
OUT
VCC
GND
VIDEO
OUT
T00138
AFT
OUT
VCC
GND
VIDEO
OUT
T00139
No. 6803-5/14
5 Page 
Continued from preceding page.
Pin No.
Pin
LA7567GM
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
1kΩ 1kΩ
INTER/SPLIT SW
LO=INTER
16
A13691
• 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.
1kΩ
17
A13692
18
• VIF amplifier input.
18
19
VIF input
The input circuit is a balanced circuit, and the input circuit
constants are:
R ≈ 1.5 kΩ
19
C ≈ 3 pF
20 GND
A13693
Continued on next page.
No. 6803-11/14
11 Page | ||
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