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PDF LA75521VA Data sheet ( Hoja de datos )
| Número de pieza | LA75521VA | |
| Descripción | IF Signal Processing (VIFSIF) IC | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : EN*A1004
LA75521VA
Monolithic Linear IC
IF Signal Processing (VIF+SIF) IC
that Supports the PAL Video
Standard for TV Sets and VCRs
Overview
The LA75521VA is a fully adjustment-free VIF + SIF signal processing IC for TV sets and VCRs that supports the PAL
video standard. It supports 38.0MHz, 38.9MHz, and 39.5MHz as the IF frequencies, as well as PAL sound multi-system
(M/N, B/G, I and D/K), and contains an on-chip sound carrier trap. The IC employs a 4MHz frequency (which can be
switched to 4.43MHz) as the reference frequency of the adjustment free circuit, and controls the VCO, AFT, and sound
filter using an external input signal.
Features
• Internal VCO adjustment free circuit eliminating the need for an external VCO coil.
• Internal sound carrier trap enables easy configuration of PAL sound multi-system at low cost.
• Considerably reduces the number of required peripheral parts.
• Use of digital AFT eliminates a problem of AFT tolerance.
• Package: SSOP24(225mil)
Functions
• VIF amplifier
• Adjustment-free VCO and PLL detector circuit
• Digital AFT circuit
• RF AGC
• Buzz canceller
• EQAMP
• Internal sound carrier trap
• First SIF detector circuit
• PLL-FM detector circuit
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
21308 TI IM No.A1004-1/13
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Pin Assignment
LA75521VA
DE-EMPHASIS C 1
SIF AGC FILTER 2
FM PLL FILTER 3
VCC 4
VIDEO OUTPUT 5
EQ FILTER 6
SIF SYSTEM SW A 7
APC FILTER 8
SIF SYSTEM SW B 9
VIF FREQUENCY SW 10
REFERENCE CP INPUT 11
AFT OUTPUT 12
LA75521VA
24 AUDIO OUTPUT
23 FILTER CONTROL C
22 AUDIO BIAS FILTER
21 SIF CARRIER OUTPUT
20 RF AGC VR
19 GND
18 VIF IN 1
17 VIF IN 2
16 VIF AGC FILTER
15 AFT MUTE LEVEL
14 RF AGC OUTPUT
13 1st SIF INPUT
Top view
Block Diagram
AUDIO
OUTPUT
SOUND CARRIER
OUTPUT
1μF
1μF
VIF/SIF
INPUT
SAWF(P) 0.022μF
RF AGC
OUTPUT
SW15
SAWF(S)
V4
V3
V2
V1
SW13
SW10 VIF FREQUENCY
V3 39.5MHz
V2 38.9MHz
V1 38.0MHz
24 23 22 21 20 19 18 17 16 15 14 13
SW11 REFERENCE
DE-
EMP
RF
AGC
VIF
AMP
TRAP
1stSIF
AMP
OPEN 4.43MHz
SHORT 4.0MHz
SW13 SYSTEM
AMP
FM
DET
SIF
AMP
AGC
IF
AGC
SPLIT
AMP
INT
TRAP
EQ
AMP
VIDEO
DET
AGC
VCO
APC
AFT
SW
MODE
CTRL
OPEN
SHORT
SPLIT
INTER
SW15 AFT MUTE LEVEL B/G TRAP SHIFT
V4 MIDDLE (VCC/2)
V3 MIDDLE (VCC/2)
V2 HI (VCC)
V1 HI (VCC)
0
+250kHz
0
+250kHz
Pin 7
HI
HI
LO
Pin 9
HI
LO
HI
SIF SYSTEM
M
I
B/G
1234
0.01μF
0.033μF
3.3kΩ
0.01μF
330pF
5
VIDEO
OUTPUT
6 7 8 9 10 11 12
0.47μF
SW11
51Ω
SW10
1000pF
V3
SYSTEM SW SYSTEM SW
V2
V1
270kΩ
A B VIF FREQ. 4.43/4MHz
AFT
OUTPUT
LO LO
D/K
VCC
No.A1004-5/13
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
LA75521VA
Continued from preceding page.
Pin Pin name
No.
16 IF AGC
Function
IF AGC filter connection pin.
The signal peak-detected by the built-in AGC
detector is converted to the AGC voltage at pin 16.
Additionally, a second AGC filter (a lag-lead filter)
used to create the dual time constants is provided
internally in the IC.
Use a 0.022μF capacitor as the external capacitor
(C1), and adjust the value according to the sag,
AGC speed, and other characteristics.
17 VIF IN2
18 VIF IN1
VIF amplifier input pin
The input circuit is a balanced circuit, and the input
impedance is as follows:
R ≈ 1.0kΩ
Equivalent Circuit
5kΩ
1kΩ
16
C1
1kΩ
1kΩ 1kΩ
17
18
19 GND
20 RF AGC VR
RF AGC volume connection pin
This pin sets the tuner RF AGC operating point.
Also, the FM output and the video output can both
be muted at the same time by connecting this pin
to ground.
21 SIF CARRIER
OUT
First SIF output pin
This is an emitter-follower output with a 200Ω
resistor attached in series.
1kΩ
1kΩ
20
21
200Ω
Continued on next page.
No.A1004-11/13
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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