Ordering number : ENA1256 Monolithic Linear IC LA75525AVA For TV and VCR sets VIF/SIF Signal-Processing IC Overview 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 = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max Circuit voltage V12 Circuit current I5 -3 mA I9 -7 mA I24 -2 mA 500 mW Ta ≤ 75°C, Mounted on a specified board * 6 V VCC V Allowable power dissipation Pd max Operating temperature Topr -20 to +75 °C Storage temperature Tstg -55 to +150 °C * Specified board: 114.3mm×76.1mm×1.6mm, 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 = 25°C Parameter Symbol Recommended supply voltage VCC Operation supply voltage VCC op Conditions Ratings Unit 5 V 4.5 to 5.5 V Electrical Characteristics at VCC=5V, S7, S9: Short Parameter Symbol Conditions Ratings min typ Unit max VIF Block Circuit current (external trap) I4(EXT) Max RFAGC voltage V14H Min RFAGC voltage V14L Input sensitivity Vi AGC range GR 58 63 dB Max allowable input Vi max 95 100 dBµV No-signal state video output V5 1.85 2.2 External Trap Video out2 60 70 VCC-0.5 VCC 34 80 mA 0 0.5 V 40 46 dBµV V 2.55 V voltage (Ext TRAP) Sync signal edge voltage V5tip 0.8 1.0 1.2 V Video output level (External trap) VOT 0.89 1.05 1.21 Vpp Black noise threshold voltage VBTH 0.40 0.65 0.90 V Black noise clamp voltage VBCL 1.2 1.5 1.8 Video S/N (External trap) S/N(EXT) External Trap 48 52 C-S beat IC-S P/C = P/S = 10dB 38 43 dB Frequency characteristics Fc 6MHz -3 -1.5 dB Differential gain DG Differential phase DP No-signalt AFT voltage V12 Max AFT voltage 3 V dB 6.5 % 3 5 2.0 2.5 3.0 V V12H VCC-1 VCC-0.5 VCC V Min AFT voltage V12L 0 0.18 1 V AFT detection sensitivity Sf 12.5 16.5 AFT output resolution Res-aft VIF input resistance Ri VIF input capacity Ci APC pull-in range (U) Fpu APC pull-in range (L) Fpl pin 15 to GND 8.5 3.125 kΩ 3 pF 2.4 -2.4 mV/kHz kHz/bit 1.0 2.0 deg MHz -2.0 MHz 1st SIF block: Pin 13 41.25MHz input Conversion gain VG S = 40dBµ 37 43 49 dB Output level SO S = 80dBµ 100 110 120 dBµV SIF output gain Gbpf Reference to SIF input (Pin 1) 0 3 6 1st SIF max input Si max 100 110 1st SIF input resistance Ri(SIF) 41.25MHz 2 kΩ 1st SIF input capacity Ci(SIF) 41.25MHz 3 pF dB dBµV SIF block: Pin 13 41.25MHz input Limiting sensitivity Vli(lim) FM detection output voltage VOFM AMR AMR Distortion factor THD SIF S/N S/N(FM) +/-25kHz 50 56 62 dBµV 420 600 780 mVrms 50 60 0.3 59 dB 0.8 65 % dB Control block Inter carrier control voltage V13 0.3 V AFT mute level control voltage V15 0.3 V Others Reference clock input level Reflev Reference frequency SW R11 4.0MHz 83 90 150 270 95 dBµV kΩ threshold resistance value 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-c” This frequency becomes 3.58MHz when this pin is set to ”C-d” 11 C- 1 1000pF 4MHz IN 11 C- 2 1000pF 270kΩ 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 0.5 6.4 4.4 13 12 1 0.5 0.15 0.22 0.1 (1.3) 1.5max (0.5) SANYO : SSOP24(225mil) Pin Assignment 24 AUDIO OUTPUT SIF INPUT 1 FM BIAS FILTER 2 23 FILTER CONTROL C SIF CARRIER OUTPUT 3 22 AUDIO BIAS FILTER VIDEO OUT 5 EQ FILTER 6 EQ INPUT 7 APC FILTER 8 21 SIF BPF OUTPUT LA75525AVA VCC 4 CAMPSITE VIDEO OUTPUT 9 20 RF AGC VR 19 GND 18 VIF IN 1 17 VIF IN 2 16 IF AGC FILTER US/JP-TV/FM SW 10 15 AFT MUTE LEVEL REFERENCE CP INPUT 11 14 RF AGC OUTPUT AFT OUTPUT 12 13 1st SIF INPUT Top View No.A1256-4/10 AUDIO OUTPUT 1 2 23 0.01µF 3 FM AMP 22 4.5MHz BPF 330Ω LIM AMP FM DET AMP 24 1µF VIDEO OUT 4 21 INT 5 EXT 6 INT TRAP EQ AMP 19 SPLI IF AGC RF AGC 20 7 18 9 16 270Ω 15µH 8 VIDEO DET VIF AMP 17 SAW(P) 0.022µF 10 APC DET OPEN 12 3.58/4MHz 1000pF 11 AFT AGC 13 SAWF (S) MODE CTRL SW VCO 1st SIF AMP 14 RF AGC OUTPUT SW15 15 VIF/SIF INPUT 560Ω SOUND CARRIER OUTPUT 270kΩ SW11 AFT OUTPUT SHORT OPEN SW15 SHORT 3.58MHz REF 4.0MHz SW11 OPEN SW13 SW13 INTER SPLIT SYSTEM VCC AFT MUTE LEVEL SHORT OPEN JUST FM CARRIER LA75525AVA Block Diagra No.A1256-5/10 LA75525AVA Pin Function Pin No. 1 Pin name SIF INPUT Function SIF input. The input impedance is about 1kΩ. Since buzzing and buzz beating can occur if interference enters this input pin, care Equivalent circuit VCC 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 200Ω 1kΩ 200Ω 1kΩ switched. SW1 1 2 FM BIAS FM detector bias line filter input. FILTER Used to improve the FM detector signal-to-noise ratio. 3.6V C1 should be at least 0.47µF, and 1µF is recommended. 5kΩ If the FM detector is not used, connect pin 2 to ground through a 2kΩ resister. This stops the FM detector VCO. 5kΩ 2 4kΩ C1 7kΩ 3 SIF CARRIER SIF carrier output. OUTPUT A 200Ω resister is inserted in series with an emitter-follower output. 200Ω 3 4 VCC Use the shortest distance possible when decoupling Capacitors VCC and ground. 5 VIDEO OUT Equalizer circuit. This circuit is used to correct the video signal 6 EQ FILTER frequency characteristics. 7 EQ INPUT Pin 7 is the EQ amplifier input. Notes on equalizer amplifier is designed as a gain of about 0dB. VCC 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 2kΩ VO is the output signal, then: R1 2 + 1(Vi + Vin) = VO × G 1kΩ 5 6 Where G is the voltage-follower amplifier gain. C Assume: L Vin: Imaginary short 50kΩ G ≈ 0. Vin ≈ 0. VOG R1 Then: AV = Vi = Z +1 R 200Ω 7 R1 is the IC internal resistance, and is 1kΩ. 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. Continued on next page. No.A1256-6/10 LA75525AVA Continued from preceding page. Pin No. 8 Pin name APC FILTER Function PLL detector APC filter connection. For this APC filter we recommend: Equivalent circuit VCC R = 150Ω FROM APC DET C = 0.47µF 1kΩ 1kΩ A B 20kΩ 8 9 COMPOSIT Output for the video signal that includes the SIF carrier. A resistor VIDEO must be inserted between pin 9 and ground to acquire adequate OUTPUT drive capability 1.5kΩ R2 ≥ 560Ω 2kΩ 9 10 US/JP-TV/FM Please use this pin only with OPEN. SW 66kΩ 1kΩ 10 34kΩ 11 REFERENCE Reference frequency input from this pin. The reference frequency CP INPUT is 3.58MHz, inserting 270kΩ between this pin to GND. The reference frequency is 4.0MHz, this pin leaving open. 200kΩ 500Ω 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 390Ω. This circuit includes a control function that control the AFT voltage to naturally approach the center voltage during weak field reception. 300Ω 3pF 300Ω 12 300Ω Continued on next page. No.A1256-7/10 LA75525AVA Continued from preceding page. Pin No. Pin name 13 1st SIF INPUT Function Equivalent circuit First SIF input. ADC cut capacitor must be used in the input circuit. 2kΩ If a SAW filter is used: The first SIF sensitivity can be increased by inserting an inductor 2kΩ between the SAW filter and the IC to neutralize the SAW filter output capacitance and the IC input capacitance. 100kΩ 12pF When used in an intercarrier system: This pin (pin 13) maybe connect to GND. 20kΩ 100Ω 30pF 13 RF AGC OUTPUT RF AGC OUT PUT. This output controls the tuner RF AGC. A protective 200Ω resister is inserted in series with the open collector out put. Determine the external bleeder resister value in 14 accordance with the specifications of the tuner. 200Ω 67Ω 15 AFT MUTE The MUTE voltage of AFT is set up this pin. It becomes a voltage LEVEL that generated by an external bleeder resistor, when this pin is VCC connected with GND. It becomes a High voltage (VCC) when this 50kΩ pin is leaving open. 1kΩ 15 1kΩ 10kΩ 80kΩ 30kΩ 16 IF AGC INPUT IF AGC filter connection. VCC 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, and other characteristics. 1kΩ 1kΩ 16 17 VIF IN 2 VIF amplifier input. 18 VIF IN 1 The input circuit is a balanced circuit, and the input constants are: R = 1.0kΩ 1kΩ 100Ω 1kΩ 100Ω C = 3pF 20kΩ 17 19 GND 18 GND Continued on next page. No.A1256-8/10 LA75525AVA Continued from preceding page. Pin No. 20 Pin name RF AGC VR Function Equivalent circuit RF AGC VR connection. VCC 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. 3.6V 1kΩ 1kΩ 20 21 SIF BPF The output to the external band-pass filter is passed through an OUTPUT internal 6dB amplifier before being output. VCC 100Ω 21 22 AUDIO BIAS FILTER Connection for a filter used to hold the FM detector output DC voltage fixed. Normally, a 1µF electrolytic capacitor should be 300Ω 20KΩ 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 300Ω 20KΩ dynamic range can be increased by inserting a resistor and a capacitor in series between pin 22 and GND. 22 23 FILTER Internal sound carrier TRAP are tuned using the capacitor CONTROL C connected to pin 23. A value between 0.47µF and 1µF is considered desirable taking video S/N, and AM and PM noise into consideration. 500Ω 500Ω 23 20KΩ 24 AUDIO Audio FM detector output. A 54kΩ resister is inserted in series OUTPUT with an emitter-follower output. VCC For applications that support mono: 400Ω Create an external de-emphasis circuit. t = C1 × R1 54kΩ R1 24 C1 6kΩ 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. 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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