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Ordering number : ENA1256
Monolithic Linear IC
LA75525AVA
Overview
For TV and VCR sets
VIF/SIF Signal-Processing IC
The LA75525AVA is a completely adjustment-free NTSC VIF/SIF signal-processing IC for TV sets and VCRs. It supports IF frequencies of 45.75MHz. It integrates an automatic adjustment circuit for the VCO, an AFT circuit, and an audio carrier trap circuit on the same chip and requires the input of either a 4MHz or 3.58MHz reference signal.
Functions
* VIF block: VIF amplifier, buzz canceller, IF-VCO, PLL detector, IF-AGC, RF-AGC, digital AFT, equalizer amplifier * 1stSIF block: 1stSIF amplifier,1stSIF detector * SIF block: Limiter amplifier, PLL FM detector * Others: reference frequency changeover SW, AFT mute voltage SW
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Circuit voltage Circuit current Symbol VCC max V12 I5 I9 I24 Allowable power dissipation Operating temperature Storage temperature Pd max Topr Tstg Ta 75C, Mounted on a specified board * Conditions Ratings 6 VCC -3 -7 -2 500 -20 to +75 -55 to +150 Unit V V mA mA mA mW C C
* Specified board: 114.3mmx76.1mmx1.6mm, glass epoxy board.
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.
41509 MS 20080618-S00001 No.A1256-1/10
LA75525AVA
Recommended Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operation supply voltage Symbol VCC VCC op Conditions Ratings 5 4.5 to 5.5 Unit V V
Electrical Characteristics at VCC=5V, S7, S9: Short
Parameter VIF Block Circuit current (external trap) Max RFAGC voltage Min RFAGC voltage Input sensitivity AGC range Max allowable input No-signal state video output voltage (Ext TRAP) Sync signal edge voltage Video output level (External trap) Black noise threshold voltage Black noise clamp voltage Video S/N (External trap) C-S beat Frequency characteristics Differential gain Differential phase No-signalt AFT voltage Max AFT voltage Min AFT voltage AFT detection sensitivity AFT output resolution VIF input resistance VIF input capacity APC pull-in range (U) APC pull-in range (L) V5tip VOT VBTH VBCL S/N(EXT) IC-S Fc DG DP V12 V12H V12L Sf Res-aft Ri Ci Fpu Fpl 2.0 pin 15 to GND 2.0 VCC-1 0 8.5 External Trap P/C = P/S = 10dB 6MHz 0.8 0.89 0.40 1.2 48 38 -3 1.0 1.05 0.65 1.5 52 43 -1.5 3 3 2.5 VCC-0.5 0.18 12.5 3.125 1.0 3 2.4 -2.4 -2.0 6.5 5 3.0 VCC 1 16.5 1.2 1.21 0.90 1.8 V Vpp V V dB dB dB % deg V V V mV/kHz kHz/bit k pF MHz MHz I4(EXT) V14H V14L Vi GR Vi max V5 Video out2 34 58 95 1.85 External Trap 60 VCC-0.5 70 VCC 0 40 63 100 2.2 2.55 0.5 46 80 mA V V dBV dB dBV V Symbol Conditions Ratings min typ max Unit
1st SIF block: Pin 13 41.25MHz input Conversion gain Output level SIF output gain 1st SIF max input 1st SIF input resistance 1st SIF input capacity SIF block: Pin 13 41.25MHz input Limiting sensitivity FM detection output voltage AMR Distortion factor SIF S/N Control block Inter carrier control voltage AFT mute level control voltage Others Reference clock input level Reference frequency SW threshold resistance value Reflev R11 4.0MHz 83 150 90 270 95 dBV k V13 V15 0.3 0.3 V V Vli(lim) VOFM AMR THD S/N(FM) 59 +/-25kHz 50 420 50 56 600 60 0.3 65 0.8 62 780 dBV mVrms dB % dB VG SO Gbpf Si max Ri(SIF) Ci(SIF) 41.25MHz 41.25MHz S = 40dB S = 80dB Reference to SIF input (Pin 1) 37 100 0 100 43 110 3 110 2 3 49 120 6 dB dBV dB dBV k pF
No.A1256-2/10
LA75525AVA
A: IF system SW The IF frequency becomes 45.75MHz when pin 10 is open. B: Split / Inter carrier SW Inter-carrier is selected by setting the 1st SIF input (pin 13) to GND. C: Reference frequency changeover SW The reference frequency becomes 4.0MHz when pin 11 is set to "C- " This frequency becomes 3.58MHz when this pin is set to "C- "
C- 1 1000pF 11 C- 2 1000pF 11
270k
4MHz IN
3.58MHz IN
D: AFT mute level The AFT mute level becomes HI (VCC) when pin 15 is open. This level becomes MIDDLE (VCC/2) when pin 15 is connected to GND. * For VCC = 5 V
No.A1256-3/10
LA75525AVA
Package Dimensions
unit : mm (typ) 3287
6.5 24 13
4.4
6.4
1 0.5 (0.5) 0.22
12 0.15
SANYO : SSOP24(225mil)
Pin Assignment
SIF INPUT 1 FM BIAS FILTER 2 SIF CARRIER OUTPUT 3 VCC 4 VIDEO OUT 5 EQ FILTER 6 EQ INPUT 7 APC FILTER 8 CAMPSITE VIDEO OUTPUT 9 US/JP-TV/FM SW 10 REFERENCE CP INPUT 11 AFT OUTPUT 12 Top View 24 AUDIO OUTPUT 23 FILTER CONTROL C 22 AUDIO BIAS FILTER 21 SIF BPF OUTPUT
0.1
(1.3)
1.5max
0.5
LA75525AVA
20 RF AGC VR 19 GND 18 VIF IN 1 17 VIF IN 2 16 IF AGC FILTER 15 AFT MUTE LEVEL 14 RF AGC OUTPUT 13 1st SIF INPUT
No.A1256-4/10
Block Diagra
SOUND CARRIER OUTPUT
VIF/SIF INPUT RF AGC OUTPUT
SAW(P) AUDIO OUTPUT SW15 SW13 SAWF (S)
0.01F
1F
0.022F
24 20
RF AGC
AMP 1st SIF AMP VIF AMP
23 19 17
22 21 18
16
15
14 13
IF AGC SPLI INT FM DET TRAP
FM AMP
AGC VIDEO DET
SW11 OPEN
REF 4.0MHz SHORT 3.58MHz
FM CARRIER JUST
VCO AFT SW
SW13 OPEN SHORT
SYSTEM SPLIT INTER
LA75525AVA
INT
LIM AMP EQ AMP
EXT
APC DET
MODE CTRL
SW15 OPEN SHORT
AFT MUTE LEVEL
1 5 6
2
3 4
7
8
9
10
11
12
AFT OUTPUT
560
4.5MHz BPF 330 15H VIDEO OUT 270
1000pF
SW11 270k OPEN 3.58/4MHz
VCC
No.A1256-5/10
LA75525AVA
Pin Function
Pin No. 1 Pin name SIF INPUT Function SIF input. The input impedance is about 1k. Since buzzing and buzz beating can occur if interference enters this input pin, care must be taken when design the pattern layout for this pin. Note that the video and chrominance signals are especially likely to interface with the audio signal. Also, the VIF carrier signal can also cause interference. By SW1, Gain at the time of Intercarrier and Split system is switched.
200 200 1k 1k VCC
Equivalent circuit
SW1
1
2 FM BIAS FILTER FM detector bias line filter input. Used to improve the FM detector signal-to-noise ratio. C1 should be at least 0.47F, and 1F is recommended. If the FM detector is not used, connect pin 2 to ground through a 2k resister. This stops the FM detector VCO.
5k 5k 3.6V
2
C1 4k 7k
3
SIF CARRIER OUTPUT
SIF carrier output. A 200 resister is inserted in series with an emitter-follower output.
200
3
4 5 6 7
VCC VIDEO OUT EQ FILTER EQ INPUT
Use the shortest distance possible when decoupling Capacitors VCC and ground. Equalizer circuit. This circuit is used to correct the video signal frequency characteristics. Pin 7 is the EQ amplifier input. Notes on equalizer amplifier is designed as a gain of about 0dB. when user for frequency characteristics correction, a capacitor, inductor, and resistor must be connected in series between pin 6 and ground. Approach used in the equalizer amplifier If Vi the input signal and VO is the output signal, then: R1 2 + 1(Vi + Vin) = VO x G Where G is the voltage-follower amplifier gain. Assume: Vin: Imaginary short G 0. Vin 0. VOG R1 Then: AV = Vi = Z +1 R1 is the IC internal resistance, and is 1k. In the application design, simply select Z to correspond to the desired characteristics. However, since the EQ amplifier gain will be maximum at the resonant point defined by Z, care is required to assure that distortion dose not occur.
200 50k 2k 1k VCC
5 6
C L R
7
Continued on next page. No.A1256-6/10
LA75525AVA
Continued from preceding page.
Pin No. 8 Pin name APC FILTER recommend: R = 150 C = 0.47F Function PLL detector APC filter connection. For this APC filter we
VCC FROM APC DET
Equivalent circuit
1k
1k A
B 20k
8
9 COMPOSIT VIDEO OUTPUT Output for the video signal that includes the SIF carrier. A resistor must be inserted between pin 9 and ground to acquire adequate drive capability R2 560
1.5k 2k
9
10
US/JP-TV/FM SW
Please use this pin only with OPEN.
66k 1k
10
34k
11
REFERENCE CP INPUT
Reference frequency input from this pin. The reference frequency is 3.58MHz, inserting 270k between this pin to GND. The reference frequency is 4.0MHz, this pin leaving open.
200k 500 5pF
11
12 AFT OUTPUT AFT output. AFT center voltage is generated by an external bleeder. The AFT gain is increased by increasing the resistance of this external bleeder resister. However, this resister must not exceed 390. This circuit includes a control function that control the AFT voltage to naturally approach the center voltage during weak field reception.
3pF 300 300
12
300
Continued on next page.
No.A1256-7/10
LA75525AVA
Continued from preceding page.
Pin No. 13 Pin name 1st SIF INPUT circuit. If a SAW filter is used: The first SIF sensitivity can be increased by inserting an inductor between the SAW filter and the IC to neutralize the SAW filter output capacitance and the IC input capacitance. When used in an intercarrier system: This pin (pin 13) maybe connect to GND.
20k 100k 12pF 100 30pF 2k
Function First SIF input. ADC cut capacitor must be used in the input
2k
Equivalent circuit
13
RF AGC OUTPUT RF AGC OUT PUT. This output controls the tuner RF AGC. A protective 200 resister is inserted in series with the open collector out put. Determine the external bleeder resister value in accordance with the specifications of the tuner.
14
200
67
15
AFT MUTE LEVEL
The MUTE voltage of AFT is set up this pin. It becomes a voltage that generated by an external bleeder resistor, when this pin is connected with GND. It becomes a High voltage (VCC) when this pin is leaving open.
VCC 50k 1k
15
1k 80k
10k
30k
16
IF AGC INPUT
IF AGC filter connection. 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 0.022F capacitor as the external capacitor, and other characteristics.
1k
VCC
1k
16
17 18 VIF IN 2 VIF IN 1 VIF amplifier input. The input circuit is a balanced circuit, and the input constants are: R = 1.0k C = 3pF
1k 100 1k 100
20k
17
19 GND GND
18
Continued on next page.
No.A1256-8/10
LA75525AVA
Continued from preceding page.
Pin No. 20 Pin name RF AGC VR RF AGC VR connection. This pin sets the tuner RF AGC operating point Also, the FM output and the video output can both be muted the same time by connecting this pin to GND. Function Equivalent circuit
VCC
3.6V 1k
1k
20
21 SIF BPF OUTPUT The output to the external band-pass filter is passed through an internal 6dB amplifier before being output.
VCC
100
21
22
AUDIO BIAS FILTER
Connection for a filter used to hold the FM detector output DC voltage fixed. Normally, a 1F electrolytic capacitor should be used. The capacitance should be increased if the low band (around 50Hz) frequency characteristics need to be improved. The FM detector output level can be reduced and the FM dynamic range can be increased by inserting a resistor and a capacitor in series between pin 22 and GND.
300 20K 300 20K
22
23 FILTER CONTROL C Internal sound carrier TRAP are tuned using the capacitor connected to pin 23. A value between 0.47F and 1F is considered desirable taking video S/N, and AM and PM noise into consideration.
500
500
23
20K
24
AUDIO OUTPUT
Audio FM detector output. A 54k resister is inserted in series with an emitter-follower output. For applications that support mono: Create an external de-emphasis circuit. t = C1 x R1
R1
VCC 400
54k
24
C1 6k
No.A1256-9/10
LA75525AVA
SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above.
This catalog provides information as of April, 2009. Specifications and information herein are subject to change without notice. PS No.A1256-10/10

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