|
|
PDF LA75665NM Data sheet ( Hoja de datos )
| Número de pieza | LA75665NM | |
| Descripción | VIF/SIF IF Signal-Processing Circuit | |
| Fabricantes | Sanyo | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LA75665NM (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
Ordering number : ENN*6954
Preliminary
Monolithic Linear IC
LA75665NM
VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL
and NTSC Multisound Support
Overview
The LA75665NM is a VIF/SIF IC that supports PAL and
NTSC multisound and that adopts a semi-adjustment-free
system. To simplify adjustment, the VIF block adopts a
technique in which AFT adjustment is no longer required
by VCO adjustment. The SIF block supports audio multi-
detection by adopting a PLL detection technique. The SIF
block provides 4 inputs with IC internal switching for easy
design of multi-sound systems. Additionally, these
switches can also be used for video system sound trap
switching. The LA75665NM also includes a buzz
canceller that suppresses Nyquist buzz to achieve
improved audio quality.
Features
• No coils are used in the AFT and SIF blocks, making
these circuits adjustment free.
• PAL / NTSC multisound system can be constructed
easily.
• Built-in buzz canceller for excellent audio performance
Functions
[VIF Block]
• VIF amplifier
• PLL detector
• BNC
• RF AGC
• EQ amplifier
• AFT
• IF AGC
• Buzz canceller
[First SIF Block]
• First SIF amplifier
• First SIF detector
• AGC
[SIF Block]
• Multiple input switch
• Limiter amplifier
• PLL FM detector
Package Dimensions
unit: mm
3112-MFP24S
[LA75665NM]
24 13
1 12
12.6
0.15
0.35
1.0 0.8
SANYO: MFP24S
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
41501RM (OT) No. 6954-1/12
1 page  
Internal Equivalent Circuit Diagram
LA75665NM
No. 6954-5/12
5 Page 
LA75665NM
Notes on Sanyo SAW Filters
There are two types of SAW filters, which differ in the piezoelectric substrate material, as follows:
1. Lithium tantalate (LiTaO3) SAW filter
TSF11 s s ······ Japan
TSF12 s s ······ US
Although lithium tantalate SAW filters have the low temperature coefficient of –18 ppm/°C, they suffer from a large
insertion loss. However, it is possible, at the cost of increasing the number of external components required, to minimize
this insertion loss by using a matching circuit consisting of coils and other components at the SAW filter output. At the
same time as minimizing insertion loss, this technique also allows the frequency characteristics, level, and other aspects
to be varied, and thus provides increased circuit design flexibility. Also, since the SAW filter reflected wave level is
minimal, the circuit can be designed with a small in-band ripple level.
2. Lithium niobate (LiNbO3) SAW filter
TSF52 s s ······ US
TSF53 s s ······ PAL
Although lithium niobate SAW filters have the high temperature coefficient of –72 ppm/°C, they feature an insertion loss
about 10 dB lower than that of lithium tantalate SAW filters. Accordingly, there is no need for a matching circuit at the
SAW filter output. Although the in-band ripple is somewhat larger than with lithium tantalate SAW filters, since they
have a low impedance and a small field slew, they are relatively immune to influences from peripheral circuit
components and the geometry of the printed circuit board pattern. This allows stable out-of-band trap characteristics to be
acquired. Due to the above considerations, lithium tantalate SAW filters are used in applications for the US and Japan
that have a high IF frequency, and lithium niobate SAW filters are used in PAL and US applications that have a low IF
frequency.
Notes on SAW Filter Matching
In SAW filter input circuit matching, rather than matching the IF frequency, flatter video band characteristics can be
acquired by designing the tuning point to be in the vicinity of the audio carrier rather than near the chrominance carrier.
The situation shown in figure on the right makes it easier to acquire flat band characteristics than that in figure on the left.
The high-band is reduced
SAW filter characteristics
The high-band is
extended
Frequency
With the tuning set to the IF frequency
Frequency
A12501
With the tuning set to the vicinity of S and C
Coil Specifications
JAPAN f = 58.75 MHz
US f = 45.75 MHz
S
t=5t
0.12ø
S
t=6t
0.12ø
C = 24 pF
C = 24 pF
VCO coils
A12502
Test production No. V291XCS-3220Z
Toko Co., Ltd
A12503
Test production No. V291XCS-3188Z
Toko Co., Ltd
Picture
Picture
SAW filters (split)
TSF1137U
TSF1241
SOUND
SOUND
SAW filters (inter)
TSF5220
TSF5221
Toko Co., Ltd. 2-1-17 Higashi-yukigaya, Ohota-ku, Tokyo, Japan TEL: +81-3-3727-1167
PAL f = 38.9 MHz
S
t=7t
0.12ø
C = 24 pF
A12504
Test production No. V292GCS-7538Z
Toko Co., Ltd
Picture
TSF5315
SOUND
TSF5321
TSF5344
No. 6954-11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LA75665NM.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LA75665NM | VIF/SIF IF Signal-Processing Circuit | Sanyo |
| LA75665NV | VIF/SIF IF Signal-Processing Circuit | Sanyo |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |