Ordering number : ENN6227A Monolithic Linear IC LA75665M VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL and NTSC Multisound Support Features Package Dimensions unit: mm 3112-MFP24S [LA75665M] 13 24 1.8max 1 12 12.6 0.15 1.5 [VIF Block] • VIF amplifier • PLL detector • BNC • RF AGC • EQ amplifier • AFT • IF AGC • Buzz canceller 0.1 Functions 5.4 • 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 6.35 7.6 The LA75665M 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 multidetection 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 LA7566 also includes a buzz canceller that suppresses Nyquist buzz to achieve improved audio quality. [First SIF Block] • First SIF amplifier • First SIF detector • AGC [SIF Block] • Multiple input switch • Limiter amplifier • PLL FM detector 0.625 Overview 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 N3099TH (OT) No. 6227-1/12 LA75665M Pd max — Ta Allowable power dissipation, Pd max — mW 800 With substrate (65 × 72 × 1.6 mm3) 720 700 600 500 420 400 Independent IC 300 200 100 0 –20 0 20 40 60 70 80 100 Ambient temperature, Ta — °C Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max 6 V Circuit voltage V7, V10, VCC V I1 –2 mA Circuit current I13 –3 mA I18 –10 mA 420 mW 720 mW Allowable power dissipation Pd max Ta ≤ 50°C, independent IC When mounted on a printed circuit board* Operating temperature Topr –20 to +70 °C Storage temperature Tstg –55 to +150 °C Ratings Unit Note: * Size: 65 × 72 × 1.6 mm3, Material: paper/phenol composite Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Operating supply voltage range VCC op Conditions 5 V 4.6 to 5.5 V No. 6227-2/12 LA75665M Operating Characteristics at Ta = 25°C, VCC = 5 V, fp = 38.9 MHz Parameter Symbol Conditions Ratings min typ Unit max [VIF Block] Circuit current I3 39 46 Maximum RF AGC voltage V9H 4.5 4.9 Minimum RF AGC voltage V9L Input sensitivity VIN AGC range GR VIN max 95 Maximum allowable input No-signal video output voltage Sync tip voltage S1 = OFF 53 mA 0 0.5 V 29 35 41 dBµV 45 50 dB 100 dBµV V V13 3.2 3.5 3.8 V V13 tip 0.8 1.0 1.2 V VO 1.75 2.1 2.42 Vp-p Black noise threshold voltage VBTH 0.3 0.6 0.9 V Black noise clamp voltage VBCL 1.5 1.8 2.1 Video signal-to-noise ratio S/N 48 52 C-S beat IC-S Video output level Frequency characteristics fC 6 MHz V dB 44 49 dB –3 –1.5 dB Differential gain DG 3 8 % Differential phase DP 3 8 deg AFT voltage with no input signal V10 4 4.5 5.0 V 4.2 4.8 5.0 V V10L 0 0.1 0.2 V Sf 19 25 32 mV/kHz Maximum AFT voltage V10H Minimum AFT voltage AFT detection sensitivity VIF input resistance Ri 38.9 MHz 1.5 VIF input capacitance Ci 38.9 MHz 3 APC pull-in range (U) fPU 1.0 kΩ pF 1.5 MHz –1.5 –0.8 AFT tolerance frequency 1 dfa1 –200 0 +200 VCO 1 maximum variability range (U) dfu 1.3 1.5 VCO 1 maximum variability range (L) dfl VCO control sensitivity B APC pull-in range (L) Drift when the AFT switch is on fPL 1.25 kHz MHz –1.5 –0.75 2.3 5.0 Drift MHz 3 MHz kHz/mV s [First SIF Block] Conversion gain VG 28 31 34 dB 5.5 MHz output level SO 125 177 251 mVrms 500 1000 Maximum first SIF input SIN max First SIF input resistance RIN(SIF) 33.4 MHz 2 mVrms kΩ First SIF input capacitance CIN(SIF) 33.4 MHz 3 pF [SIF Block] Limiting sensitivity VIi(lim) FM detector output voltage VO(FM) AM rejection ratio AMR Total harmonic distortion THD SIF S/N FM detector output DC voltage 5.5 MHz ± 30 kHz 450 50 36 42 dBµV 570 720 mVrms 60 0.2 dB 1.5 % S/N (FM) 55 60 dB FMDC 1.9 2.2 2.5 V 7 dB [SIF Switch Block] Switches A, B, and C: H = open, L = ground NTSC mode 6-dB amplifier NTSW 5 6 SIF crosstalk 21 CT21 51 57 dB SIF crosstalk 22 CT22 51 57 dB SIF crosstalk 23 CT23 51 57 dB SIF crosstalk 24 CT24 51 57 SW (L) 1.0 1.5 Switch threshold low-level voltage dB 2.0 V No. 6227-3/12 LA75665M SIF IN (6.5MHz) /RFAGC VR SIF IN (6.0MHz) SIF IN (5.5MHz) SIF IN (4.5MHz) FM FILTER 1st SIF OUT COMP OUT APC NT VIDEO IN PAL VIDEO IN EQ FILTER VIDEO OUT Pin Assignment 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 FM DET OUT SIF FILTER VCC GND VIF IN VIF IN IFAGC 1st SIF IN RFAGC OUT AFT OUT VCO COIL VCO COIL LA75665M Top view A12481 8.2 µH 330 Ω 5.5 MHz, 6.0 MHz, 6.5 MHz 6.5 MHz 6.0 MHz 5.5 MHz 4.5 MHz 150 Ω 150 Ω 30 pF + 24 23 22 + 21 20 19 18 17 2.2 kΩ 16 15 RF AGC 14 13 EQ AMP INPUT SW LIM AMP VIDEO OUT 3 kΩ 4.5 MHz 47 µH 1 µF 0.01 µF 0.01 µF 2.2 kΩ 0.01 µF A 560 Ω 2.2 kΩ B 15 µH 330 Ω 2.2 kΩ C 0.47 µF 330 Ω 330 Ω 330 Ω Application Circuit Diagram IF AGC VIDEO DET 1ST SIF DET F Switch B C H H H L L H L L H H L L H L L H 5.5 MHz 6.0 MHz 5 6 8 9 10 11 12 RFAGC OUT 0.01 µF SAW (S) 0.01 µF 0.01 µF 100 µF + 30 kΩ 1 µF 6.5 MHz 7 100 kΩ 100 kΩ 4 SAW(P) VCC A H H H H L L L L 3 + 0.01 µF 5.1 kΩ 2 VCO AFT 0.022 µF 1 AUDIO OUT 1ST AMP VIF FM DET AFT OUT A12482 4.5 MHz ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● H : OPEN L : GND No. 6227-4/12 A B C AUDIO OUT 28 kΩ 24 0.01 µF 1 2 kΩ 100 Ω 28 kΩ 15 kΩ 5.1 kΩ 50 kΩ-B 0.01 µF 0.01 µF 0.01 µF 2.2 kΩ 2.2 kΩ 2.2 kΩ 6.5 MHz 330 Ω 1 µF 100 Ω 28 kΩ 15 kΩ + VCC 2 23 6.0 MHz 100 µF + 100 Ω 28 kΩ 3 0.01 µF 1 kΩ 1 kΩ 100 Ω 15 kΩ 47 µH 4 1.5 kΩ 2.5 kΩ 1 µF 330 Ω 21 4.5 MHz 30 pF 3.6 V 330 Ω 22 5.5 MHz 15 kΩ 330 Ω + 5 1 kΩ 20 SAW (P) 1 kΩ 15 pF 6 1 kΩ 1.5 kΩ 2 kΩ 2 pF 19 560 Ω 7 + 8 100 Ω 9 1 kΩ 1 kΩ 1 kΩ 17 0.47 µF 4.5 MHz 16 RFAGC OUT 10 200 Ω 30 kΩ 0.01 µF 15 200 Ω 5.5 MHz, 6.0 MHz, 6.5 MHz 15 µH SAW (S) 2 kΩ 2 kΩ 0.022 µF 10 kΩ 1 kΩ 2 kΩ 1 kΩ 18 150 Ω 330 Ω 150 Ω 8.2 µH 11 1 kΩ 1 kΩ VCO COIL 1.2 kΩ 9.2 kΩ 2 kΩ 14 1.2 kΩ 2.5 kΩ 0.01 µF 12 13 3 kΩ VIDEO OUT A12483 100 kΩ AFT OUT 100 kΩ 2.2 kΩ LA75665M Internal Equivalent Circuit Diagram No. 6227-5/12 LA75665M AC Characteristics Test Circuit Diagram 51 51 51 0.01 µF 0.01 µF 0.01 µF VIDEO OUT (A) 1st SIF OUT (C) SWA SWB 100 kΩ 51 0.01 µF 2nd SIF IN 23 22 21 20 0.47 µF + 19 18 330 Ω 150 Ω 560 Ω 24 1 µF + RF vr 20K-B 17 16 330 Ω S1 SWC 15 14 EQ AMP INPUT SW LIM AMP 13 RF AGC IF AGC VIDEO DET 1ST SIF DET F 10 51 Ω RFAGC OUT (F) IF AGC VIF IN 11 12 MA6389 100 kΩ 9 1000 pF 51 Ω 0.01 µF 100 µF 8 100 kΩ GND 7 30 kΩ 1 µF + + 6 0.01 µF 5 0.022 µF 4 0.01 µF 3 0.01 µF (M) (D) 2 0.01 µF 1 VCO AFT 0.01 µF FM DET FM DET OUT 5.1 kΩ 1ST AMP VIF AMP AFT OUT (B) 1ST SIF IN VCC GND A12484 24 23 22 21 20 19 18 330Ω 330Ω 0.01 µF 10kΩ 0.01 µF Input Impedance Test Circuit Diagram (VIF and first SIF input impedance) 17 16 15 14 13 8 9 10 11 12 0.01 µF 0.01 µF 7 VIF IN 100kΩ 6 100kΩ 5 0.01 µF 4 0.01 µF 3 0.01 µF 2 0.01 µF 1st SIF IN 100 µF Impedance analyzer 0.01 µF 0.01 µF 1 0.01 µF LA75665M + VCC A12485 No. 6227-6/12 LA75665M Pin Functions Pin No. Symbol Pin function Equivalent circuit • Audio FM detector output This circuit includes an internal 300 Ω resistor in series with the emitter-follower output. • Stereo applications 1 FM DET OUT The input impedance may be reduced according to the applications that input this signal to a stereo decoder. This can result in distortion in the left and right signals and a degradation of the stereo characteristics. If this problem occurs, add a resistor between pin 24 and ground. R2 1 300 Ω R1 C 10 kΩ R1 ≥ 5.1 kΩ • Mono applications Forms an external deemphasis circuit. A12486 t = CR2 2 SIF FILTER • Connection for a filter that holds the FM detector output DC voltage at a fixed level. Normally, a 1-µF electrolytic capacitor is used. To improve the low band (around 50 Hz) frequency characteristics, increase the value of this capacitor (C1). 1 kΩ 1 kΩ The FM detector output level can be reduced and the FM dynamic range increased by inserting this resistor in series with the capacitor. 2 + C1 R A12487 1 kΩ 1 kΩ • VIF amplifier input. 5 6 VIF IN The input circuit is constructed as a balanced input, and the input has the following impedance characteristics: R ≈ 1.5 kΩ C ≈ 3 pF 5 6 A12488 Continued on next page. No. 6227-7/12 LA75665M Continued from preceding page. Pin No. Symbol Pin function Equivalent circuit 2 kΩ • IF AGC filter connection. 7 IF AGC 1 kΩ The AGC voltage is created at pin 7 from the signal to which peak detection was applied by the internal AGC detector. Additionally, the IC includes an internal second AGC filter (a lag-lead filter) used to create a dual time constant. A 0.022 µF capacitor is used as the external capacitor. The value of this capacitor must be adjusted according to measurement of the sag, AGC speed, and other circuit aspects. 10 kΩ 7 C1 A12489 • First SIF input. A DC cut capacitor must be inserted in the input to this circuit. 8 1st SIF IN When a SAW filter is used: The first SIF sensitivity can be increased by inserting an inductor between the SAW and the IC to match the SAW output and IC input capacitances. 2 kΩ 2 kΩ When an intercarrier system is used: This pin must be connected to ground through a capacitor. 8 A12490 500 Ω VCC • RF AGC output. 9 RF AGC OUT This output controls the tuner RF AGC. This is an opencollector output with an inserted 100-Ω protective resistor. Determine the value of the external bleeder resistor to match the tuner specifications. 9 100 Ω 3 pF A12491 • AFT output. 10 AFT OUT The AFT center voltage is created with an external bleeder resistor. The AFT gain increases as the value of this bleeder resistor increases. The value of this resistor must not exceed 390 kΩ. This circuit includes a control function that controls the AFT voltage to be equal to the center voltage in weak field reception conditions. 1 kΩ 10 A12492 Continued on next page. No. 6227-8/12 LA75665M Continued from preceding page. Pin No. Symbol Pin function Equivalent circuit 12 11 12 11 • VCO tank circuit used for video detection. VCO 1.2 kΩ 1.2 kΩ See the separately provided documentation for the tank circuit coil (inductor) specifications. A12493 • Equalizer circuit. This circuit corrects the video signal frequency characteristics. • Notes on equalizer amplifier design: 13 VIDEO OUT The equalizer amplifier is designed as a voltage follower amplifier with a gain of about 2.3 dB. When the frequency characteristics are corrected, connect an inductor, a capacitor, and a resistor in series between pin 14 and ground. 14 EQ FILTER The equalizer amplifier gain is given by: 2 kΩ 1 kΩ 13 9.2 kΩ R1 AV = —— + 1 Z 14 Here, R1 is an IC internal resistor with a value of 1 kΩ. Select Z according to the desired characteristics. However, care is required to prevent distortion at the resonant point determined by Z, where the gain is maximum. C L Z R A12494 15 PAL VIDEO IN 16 NT VIDEO IN • Equalizer amplifier inputs. Pin 15 is for PAL, and pin 16 for NTSC format signals. These inputs are linked to and switched by the SIF switches. 15 16 200 Ω 200 Ω A12495 FRO APC • PLL detector APC filter connection. 17 APC FILTER The APC time constants are switched internally in the IC. When locked, the VCO is controlled over the path A, and the loop gain is reduced. When unlocked and during weak field reception, the VCO is controlled over the path B, thus increasing the loop gain. A 1 kΩ 1 kΩ 1 kΩ We recommend values of: R = 150 to 390 Ω, and B C = 0.47 µF for the loop filter constants. 17 A12496 Continued on next page. No. 6227-9/12 LA75665M Continued from preceding page. Pin No. Symbol Pin function Equivalent circuit 15pF • Output for the video signal that includes the SIF carrier. 18 COMP OUT A resistor must be inserted between pin 18 and ground to acquire an adequate drive capability. 1.5 kΩ 2 kΩ R ≥ 470 Ω 2pF 1 KΩ 18 A12497 1 kΩ • First SIF output 19 1st SIF OUT 19 The signal output from this pin is passed through a bandpass filter and input to the SIF circuit. This is an emitter-follower output. A12498 • The FM detector signal-to-noise ratio can be improved by inserting a filter in the FM detector bias line. 20 FM FILTER C1 should have a value of 0.47 µF or greater, and 1 µF is recommended . 2.5 kΩ 20 + 1.5 kΩ C1 If the FM detector is not used, pin 20 must be connected to ground through a 2-kΩ resistor. This stops the FM detector VCO circuit. A12499 • SIF inputs. Four input pins are provided to support multi-side systems, and a switching function is also included. Since buzzing and bass beating can occur if interference signals, such as the video signal or the chrominance signal, enter these pins, extra care must be taken in designing the input circuit pattern layout. Note that pin 24 also functions as the RF AGC adjustment pin. This pin sets the tuner RF AGC operating point. Also, the FM output and the video output can be muted at the same time by setting this pin to the ground level. RF AGC VR 6.5 MHz 28 kΩ 15 kΩ 11 kΩ 30 kΩ 28 kΩ 28 kΩ 15 kΩ 11 kΩ 11 kΩ 4.5 MHz 100 Ω 6.0 MHz ● 100 Ω 5.5 MHz 100 Ω SIF IN (6.5 MHz) Switch B C H H H L L H L L H H L L H L L H 30 kΩ 24 A H H H H L L L L 12 kΩ SIF IN (6.0 MHz) 30 kΩ SIF IN (5.5 MHz) 23 28 kΩ SIF IN (4.5 MHz) 22 VBGZ=3.6 100 Ω 21 VCC ● 21 ● ● ● ● ● ● ● ● ● ● ● ● 22 4.5MEG 23 5.5MEG 6.0MEG 24 6.5MEG ● SWA SWB SWC A12500 No. 6227-10/12 LA75665M 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 ■ ■ ······ Japan TSF12 ■ ■ ······ 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 ■ ■ ······ US TSF53 ■ ■ ······ 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. SAW filter characteristics The high-band is extended The high-band is reduced Frequency Frequency A12501 With the tuning set to the IF frequency With the tuning set to the vicinity of S and C Coil Specifications JAPAN S f = 58.75 MHz US t=5t 0.12ø C = 27 pF S f = 45.75 MHz PAL t=6t 0.12ø C = 39 pF S f = 38.9 MHz t=7t 0.12ø C = 39 pF VCO coils A12502 SAW filters (split) SAW filters (inter) A12503 A12504 Test production No. 16991A Tokyo Parts Industrial Co., Ltd. Test production No. 16687A Tokyo Parts Industrial Co., Ltd. Test production No. 16686A Tokyo Parts Industrial Co., Ltd. Picture Picture Picture TSF1137U TSF1241 TSF5315 SOUND SOUND SOUND TSF5220 TSF5321 TSF5221 Tokyo Parts Industrial Co., Ltd. 236 Hinode Machi Isesaki Shi, Gunma Prefecture Japan TEL: +81-270-23-3731 TSF5344 No. 6227-11/12 LA75665M Notes on VCO Tank Circuits 1. Built-in capacitor VCO tank circuits When the power is turned on, the heat generated by the IC is transmitted through the printed circuit board to the VCO tank circuit. At this point, the VCO coil frame functions as a heat sink and the IC heat is dissipated. As a result, it becomes more difficult to transmit heat to the VCO tank cricuit's built-in capacitor, and the influence of drift at power on is reduced. Therefore, it suffices to design the circuit so that the coil and capacitor thermal characteristics cancel. Ideally, it is better to use a coil with a core material that has low temperature coefficient characteristics. 2. External capacitor VCO tank circuits When an external capacitor is used, heat generated by the IC is transmitted through the printed circuit board directly to the VCO tank circuit external capacitor. While this capacitor is heated relatively early after the power is turned on, the coil is not influenced as much by this heat, and as a result the power-on drift is increased. Accordingly, a coil whose core material has low temperature coefficient characteristics must be used. It is also desirable to use a capacitor with similarly low temperature coefficient characteristics. Note: Applications that use an external capacitor here must use a chip capacitor. If an ordinary capacitor is used, problems such as the oscillator frequency changing with the capacitor orientation may occur. Specifications of any and all SANYO 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. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or 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 products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining 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 permission of SANYO Electric 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 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. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of November, 1999. Specifications and information herein are subject to change without notice. PS No. 6227-12/12