Ordering number : ENN*6930 Monolithic Linear IC LA75505M Adjustment Free VIF/SIF Signal Processing IC for TV/VCR Preliminary Overview Package Dimensions The LA75505M is a VIF/SIF signal processing IC for NTSC TV/VCR. It supports the 45.75 MHz and 58.75 MHz as the IF frequencies. On-chip sound carrier trap and sound carrier BPF circuits make it ideal for compact and light-weight tuner applications. To adjust the VCO circuit, AFT circuit, and sound filter, 4-MHz external crystal or 4MHz external signal is needed. unit: mm 3112-MFP24S [LA75505M] 5.4 6.35 7.6 13 24 12 0.15 1.5 12.6 0.625 1 0.1 • VIF amplifier • VCO adjustment free PLL detection circuit • Digital AFT circuit • RF AGC • Buzz canceller • Equalizer amplifier • Internal sound carrier BPF • Internal sound carrier trap • PLL-FM detector • Reference oscillation circuit 1.8max Functions 0.35 1.0 0.8 SANYO: MFP24S (300 mil) Features • Internal VCO adjustment free circuit eliminating need for VCO coil adjustments. • Considerably reduces the number of required peripheral parts by providing on-chip sound carrier BPF and sound carrier trap circuits. • Use of digital AFT eliminates problem of AFT tolerance. • Package: MFP24S (300 mil) 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 41301RM (OT) No. 6930-1/13 LA75505M Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage VCC max Allowable power dissipation Pd max Conditions Ratings Unit 7 Ta ≤ 70°C (*Mounted on a printed circuit board) V 470 mW Operating temperature Topr –20 to +70 °C Storage temperature Tstg –55 to +150 °C Ratings Unit Note: * Circuit board dimensions: 114.3 × 76.1 × 1.6 mm3, material: glass epoxy Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage Conditions VCC Operating voltage range VCC op 5 V 4.5 to 5.5 V Electrical Characteristics at Ta = 25°C, VCC = 5.0 V, fp = 45.75 MHz Parameter Symbol Conditions Ratings min typ Unit max [VIF Block ] Circuit current I17 Maximum RF AGC voltage V14H Minimum RF AGC voltage V14L Input sensitivity AGC range Maximum allowable input Collector load 30 kΩ VC2 = 9 V 8.5 Vi 33 GR 58 Vimax 92 64.0 73.6 9 — mA 0.3 0.7 V 39 45 dBµV V dB 97 dBµV No-signal video output voltage V4 3.3 3.6 3.9 Synchronizing signal tip voltage V4tip 1.0 1.3 1.6 V VO 1.7 2.0 2.3 Vpp 46 50 26 32 38 3 10 % deg Video output level V Video signal-to-noise ratio S/N C-S beating IC-S P/S = 10 dB Differential gain DG Vin = 80 dBµ Differential phase DP 2 10 VIF input resistance Ri 2.5 3.0 kΩ VIF input capacitance Ci 3 6 PF Maximum AFT voltage V13H 4.3 4.7 5.0 Minimum AFT voltage V13L 0 0.2 0.7 V AFT tolerance 1 dfa1 f = 45.75 MHz ±35 ±45 kHz AFT tolerance 2 dfa2 f = 58.75 MHz AFT detection sensitivity Sf AFT dead zone fda APC pull-in range (U) fpu RL = 100 kΩ//100 kΩ dB dB V ±45 ±70 kHz 40 80 120 mV/kHz 60 100 1.0 1.5 kHz MHz APC pull-in range (L) fpl 1.0 1.5 MHz VCO maximum frequency range (U) dfu 1.5 2.0 MHz VCO maximum frequency range (L) dfl 1.5 2.0 VCO control sensitivity β 2.0 4.0 MHz 8.0 kHz/mV N trap1 (4.75 MHz) NT1 wrt 1 MHz –30 –35 N trap2 (5.25 MHz) NT2 wrt 1 MHz –19 –24 NGD1 wrt 1 MHz 10 40 70 ns NGD1-1 wrt 1 MHz 70 120 170 ns Group delay 1 NTSC (3.0 MHz) Group delay 1-1 NTSC (3.5 MHz) dB dB Continued on next page. No. 6930-2/13 LA75505M Continued from preceding page. Parameter Symbol Conditions Ratings min typ Unit max [1st SIF Block] Conversion gain Vg fp = 4.5 MHz, Vi = 500µV 32 dB SIF carrier output level So Vi = 10 mV 26 100 mVrms So ±2 dB 106 First SIF maximum input Simax First SIF input resistance Ris 5.0 6.0 dBµV kΩ First SIF input capacitance Cis 3 6 pF 61 dBµV 600 750 mVrms [SIF Block] Limiting sensitivity Vi(lim) FM detector output voltage Vo(FM) fp = 4.5 MHz, ∆F = ±25 kHz at 400 Hz AM rejection ratio AMR AM = 30% at 400 Hz Total harmonic distortion THD f = 4.5 MHz, ∆F = ±25 kHz FM detector output S/N S/N(FM) 480 50 55 BPF 3-dB bandwidth BW NTSC de-emphasis Ndeem fm = 2 kHz 4-MHz level (during external input) X4MIN Terminated IF system SW threshold resistance V12 Split/inter SW V16 60 0.5 dB 1.0 % 60 dB ±100 kHz –3 dB [Others] 86 dBµ 270 0.5 kΩ V No. 6930-3/13 LA75505M System Switching • IF system switch 45.75 MHz is selected as the IF frequency by leaving pin 12 (crystal oscillation) open. 58.75 MHz is selected by adding 220 kΩ between pin 12 and GND. • Split/inter carrier switch Inter carrier is selected by setting the first SIF input (pin 16) to GND. Pin Assignment SIF INPUT 1 24 FM DET OUT FM FILTER 2 23 RF AGC VR 1st SIF OUT 3 22 SIF PLL FILTER VIDEO DET OUT 4 21 FILTER CONTROL CAPACITOR EQ OUT 5 20 VIF INPUT APC FILTER 6 19 VIF INPUT LA75505M FLL FILTER 7 18 GND VCO COIL 8 17 VCC VCO COIL 9 16 1st SIF INPUT SIF AGC FILTER 10 15 IF AGC FILTER NC 11 14 RF AGC OUT REF OSC 12 13 AFT OUT Top view No. 6930-4/13 LA75505M Test Circuit Input Impedance Measuring Circuit (VIF, First SIF input impedance) Impedance analyzer VIF INPUT 1st SIF INPUT 21 20 19 18 17 16 15 14 13 8 9 10 11 12 100 µF 0.01 µF 15 kΩ 0.01 µF 0.01 µF 0.01 µF 0.01 µF 0.01 µF 0.01 µF 22 + 10 kΩ 23 0.01 µF 24 0.01 µF 0.01 µF 0.01 µF V CC 0.01 µF 0.01 µF 7 0.01 µF 6 0.01 µF 5 0.01 µF 4 1 kΩ 3 0.01 µF 2 0.01 µF 0.01 µF 1 0.01 µF LA75505M Top view No. 6930-5/13 LA75505M Pin Functions Pin No. Pin 1 SIF INPUT Pin Function Internal Circuit Inputs the SIF signal from the first SIF output. Set the input level to 90 dBµV or lower because of the dynamic range of the internal filter. This is the FM feedback filter pin. It is composed of a C and R filters. 1 µF is normally used as the capacitance. 2 FM FILTER If the capacitance is a low value, the audio output level is small at low frequencies. Moreover, the audio output level can be made smaller by increasing the resistance connected in series. Use a resistance of 3 kΩ or higher. This is the first SIF output. In case of inter carrier, the chroma carrier is bigger than split carrier applications, so that it is recommended to connect a filter externally. 3 1st SIF OUT Filter example Continued on next page. No. 6930-6/13 LA75505M Continued from preceding page. Pin No. Pin Pin Function Internal Circuit Pin 4 is the video output pin. The EQ amplifier can be thought of as shown below. 4 VIDEO-OUT 5 EQ-OUT Therefore, the peak gain of the EQ amplifier is determined by Av = 1 + R/Z. However, note that the LA75505M being an IC with VCC = 5 V, setting too large an amplitude causes distortion in the VCC side. Use so that the white level is 4 V or less. Pin 6 is the PLL detector APC filter pin. Normally the following are used: R = 330 Ω C1 = 0.47 µ to 1 µF C2 = 100 pF C1 = 1 µF is effective for the overmodulation characteristics. 6 APC FILTER 7 FLL FILTER When the PLL is locked, the signal passes via the path marked A in the figure, and when PLL is unlocked and in weak signal, the signal passes via the path marked B in the figure. The PLL loop gain can thus be switched in this manner. Time constant switch output Pin 7 is a VCO automatic control FLL filter pin. Since it operates always on a small current, using a larger capacitance results in a slower response. Normally, a capacitance between 0.47 µF and 1 µF is used. Moreover, the control range for this pin is between about 3 V to 4.7 V. Since this range is determined when adjusting the VCO tank circuit, set the design center of L and C of VCO so that the voltage of pin 7 is 3.6 V. output This is the VCO tank circuit for the PLL detector. Use a tuning capacitance of 24 pF. 8 9 VCO COIL For the L and C specifications, use IF45.75 MHz specifications within ±1.5%, and 58.75 MHz specifications within ±1%. Also, design the L and C values so that the voltage of pin 7 is 3.6 V when PLL is locked while using the IF center frequency. Continued on next page. No. 6930-7/13 LA75505M Continued from preceding page. Pin No. Pin 10 SIF AGC FILTER Pin Function Internal Circuit Pin 10 is the SIF AGC filter pin. Use a capacitance of 0.01 µF to 0.1 µF. 10 11 NC Not connected This pin can be used both as the crystal resonator pin and IF switch. 12 REF OSC The 58.75-MHz mode is selected by inserting 220 kΩ between pin 12 and GND, the 45.75 MHz mode by leaving the pin open. 4-MHz input is possible from this pin. In the case of 4-MHz external input, input 86 dBµ or more. Pin 13 is the AFT output pin. Use external resistors of 47 kΩ and a filter capacitance 0.1 µF. The AFT circuit generates the AFT voltage by comparing the signal obtained by dividing the 4-MHz reference frequency with the signal obtained by dividing VCO. Since it uses a digital phase comparator, a dead zone exists in the AFT center. 13 AFT OUT waveform Continued on next page. No. 6930-8/13 LA75505M Continued from preceding page. Pin No. Pin Pin Function Internal Circuit Pin 14 is the RF AGC output. RF AGC max is determined by R1 and R2. RF AGC min is determined by R3 and R4. 14 RF AGC OUT Capacitor C1 prevents oscillation and capacitor C2 is the RF AGC filter. Normally 30 kΩ is used for R1, but if the tuner's F/E transistor is GaAS, the gate's impedance is lower, so use approx. 10 kΩ. Pin 15 is the IF AGC filter pin. 15 IF AGC FILTER Normally, 0.01 µF to 0.02 µF polyester film capacitor is used. Determine the impedance based on H-SAG and AGC speed. Pin 16 can be used both as the First SIF IN and inter/split switch pins. In the case of inter carrier, connect pin 16 to GND. When a sound saw filter is added, the matching loss can be decreased by inserting L to neutralize the IC input capacitance and saw filter output capacitance. 16 1st SIF INPUT Continued on next page. No. 6930-9/13 LA75505M Continued from preceding page. Pin No. Pin 17 VCC 18 GND Pin Function Internal Circuit Connect the decoupling capacitor as close as possible. Pins 19 and 20 are VIF input pins. To reduce the loss of signal through a saw filter, input registors are set to 2 kΩ. VIF amplifier has three capacitive coupling amplifiers, direct connection from a saw filter is available. 19 20 21 VIF INPUT FILTER CONTROL CAPACITOR Internal filters (i.e. sound carrier BPF and sound carrier trap) are tuned using the capacitor connected to pin 21. A value between 0.47 µF and 1 µF is considered desirable taking video S/N, and AM and PM noise into consideration. Continued on next page. No. 6930-10/13 LA75505M Continued from preceding page. Pin No. Pin Pin Function Internal Circuit Pin 22 is the SIF PLL filter pin. Normally use the following values. R: 3 kΩ C1: 0.01 µF C2: 1000 pF 22 SIF PLL FILTER When R is too large, the PLL may become unlocked, so use a resistance value within 6 kΩ. A smaller R value results in low-pass noise. Pin 23 is the RF AGC VR pin. 23 RF AGC VR When this pin is connected to GND, no signal is appeared on pin 4 and pin 24. Pin 24 is the FM output pin. 24 FM DET OUT Time constance of de-emphasis is determined by external C, R. Please chose C, R to make time constance 75 µs. No. 6930-11/13 LA75505M Sample Application Circuit IF INPUT 0.01µ VCC(5V) SAW(S) 30k VCC(9V) 0.01µ 0.01µ 0.01µ RF AGC OUT 0.1µ 100µ 3k AUDIO OUT 1µ 7.5k 24 1000p 23 22 21 0.02µ SAW(P) 0.01µ 20 19 18 17 16 15 47k 47k 14 AFT OUT 13 FM DET VIF AMP S PLL FM DET FIL CONT LIM AMP 1st AMP IF AGC VIDEO DET APC DET AFT AMP AGC 1stSIF DET Unit Capacitance: F Resistance: Ω AMP SW BPF EQ AMP TRAP 4 5 LPF VCO FLL BPF 1 2 3 7 8 9 10 1µ 3k 2k VIDEO OUT 11 12 220k 1µ 330 1µ 39p 6 0.01µ VCO COIL IF SW OPEN:45.75MHz GND :58.75MHz 4MHz X’tal CARRIER OUT No. 6930-12/13 LA75505M 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 April, 2001. Specifications and information herein are subject to change without notice. PS No. 6930-13/13