Ordering number : ENA0356 Monolithic Linear IC LA75710VA NTSC Support TV and VCR VIF/SIF Signal Processing IC Overview The LA75710VA is an NTSC support VIF/SIF signal processing IC that adopts a semi-adjustment-free system. The video-S/N and audio-S/N characteristics are improved. Further, it includes a circuit to prevent video over modulation. For the AFT function it adopts digital AFT. PLL detection is adopted in the FM detector. A 5V power-supply voltage is used to match that used in most multimedia systems. In addition, this IC also includes a buzz canceller to suppress Nyquist buzz and provide high audio quality. Functions • VIF Block: VIF Amplifier, PLL Detector, IF AGC, RF AGC, Equalizer, amplifier, Buzz Canceller, Digital AFT, FLL • 1st SIF Block: 1st SIF Amplifier, 1st SIF Detector • SIF Block: Limiter Amplifier, PLL FM detector • Others: IF SW (45.75MHz, 58.75MHz) Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum Supply voltage VCC 6 V Circuit voltage V16 VCC V V21 VCC Circuit Current -3 mA I11 -7 mA I23 Allowable power dissipation V I5 Pd max Ta≤75°C * -2 mA 500 mW Operating temperature Topr -20 to +75 °C Storage temperature Tstg -55 to +150 °C * When mounted on a 65×72×1.6mm3, glass epoxy circuit board. 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SANYO Semiconductor 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 products described or contained herein. 80206 MS OT 20060601-S00001 No.A0356-1/10 LA75710VA Operating Ranges at Ta = 25°C Parameter Recommended supply voltage Operating supply voltage Symbol Conditions Ratings Unit VCC VCC op 5.0 V 4.5 to 5.5 V Electrical Characteristics at Ta = 25°C, VCC = 5V VIF Block Parameter Symbol Ratings Conditions min Circuit current 1 Circuit current 2 I8 V14H Minimum RF AGC voltage V14L Input sensitivity AGC range 49 I4 Maximum RF AGC voltage Vi typ Video out 2 Unit max 54 59 mA 9 11 13 mA VCC-0.5 VCC 0 0.5 V 40 46 dBµV 34 V GR 52 56 dB Vi max 95 100 dBµV V5 2.48 2.72 2.96 Sync. Signal tip voltage V5tip 0.8 1.0 1.2 V Video output amplitude VOTV 1.3 1.5 1.7 Vp-p Black noise threshold voltage VBTH 0.40 0.65 0.90 V Black noise clamp voltage 1.9 Maximum allowable input No-signal video output voltage V VBCL 1.3 1.6 Video S/N S/N 52 56 dB V C-S best IC-S P/C = P/S = 10dB 45 50 dB 6MHz -3 -1.5 Frequency characteristics Fc Differential gain DG 2.0 5 % Differential phase DP 2.0 4 °C No signal AFT voltage V21 Maximum AFT voltage V21H Minimum AFT voltage V21L AFT detection sensitivity AFT output resolution Sf dB 2.2 2.5 2.8 V VCC-0.7 VCC-0.5 VCC V 0 0.5 0.7 V 8.5 12.5 16.5 mV/kHz Res-aft 3.125 kHz/bit VIF input resistance Ri 1.0 kΩ VIF input capacitance Ci 3 pF APC hold range (U) Fhu APC hold range (L) Fhl APC pull-in range (U) Fpu APC pull-in range (L) Fpl VCO maximum Dfu 2.0 2.4 -2.4 2.0 2.4 -2.4 2.1 MHz -2.0 MHz MHz -2.0 2.6 MHz MHz variable range (U) VCO maximum Dfl -2.6 -2.1 MHz variable range (L) VCO control sensitivity Synchronization ratio β 2.0 3.5 5.0 kHz/mV VS 25.0 28.5 31.5 % No.A0356-2/10 LA75710VA 1st SIF Block (pin 15: 41.25MHz input) Parameter Symbol Ratings Conditions min typ Unit max Conversion gain VG S = 40dBµ 44 48 52 dB Output level SO S = 90dBµ 100 11 120 dBµV 3 6 9 105 110 SIF carrier output level Gbpf 1st SIF maximum input Si max Reference to SIF input (Pin1) dB 1st SIF input resistance Ri (SIF) 41.25MHz 2 KΩ 1st SIF input capacitance Ci (SIF) 41.25MHz 3 PF dBµV SIF Block (pin 1: 4.5MHz input) Parameter Symbol Ratings Conditions min Limiting sensitivity Vli (lim) FM detector output voltage VOFM AMR AMR Distortion THD SIF S/N typ Unit max 40 46 52 dBµV 420 500 600 mVrms 54 60 ±25kHz 0.3 S/N (FM) 65 dB 0.7 71 % dB Control Block Parameter Symbol Ratings Conditions min AFT mute level control voltage V17 typ Unit max 2.0 V IF System Switch The IF frequency is 45.75MHz when pin 13 is in the A-(1) state, and is 58.75MHz when that pin is in the A-(2) state. AFT Muting Level The AFT muting level is the high level when pin 17 is open, and is the middle level (VCC/2) when pin 17 is connected to ground. * VCC at 5V. No.A0356-3/10 LA75710VA Package Dimensions unit : mm 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 No.A0356-4/10 LA75710VA Block Diagram and AC Characteristics Test Circuit No.A0356-5/10 LA75710VA Pin Function Pin No. Pin name Function 1 SIF INPUT SIF input. The input impedance is about 1kΩ. Since Equivalent circuit 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. 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 0.47µF, and 1µF is recommended. If the FM detector is not used, connect pin 2 to ground through a 2kΩ resister. This stops the FM detector VCO. 3 SIF CARRIER OUTPUT SIF carrier output. A 200Ω resister is inserted in series with an emitter-follower output. 4 VCC 8 5 9 Use the shortest distance possible when decoupling Capacitors VCC and ground. EQ amp Equalizer circuit. This circuit is used to correct the video signal frequency characteristics. Pin 9 is the EQ amplifier input Continued on next page. No.A0356-6/10 LA75710VA Continued from preceding page. Pin No. Pin name 6 VCO COIL 7 10 Function Equivalent circuit VCO tank circuit used for video signal detection. This VCO is a vector synthesis VCO. APC FILTER PLL detector APC filter connection. For this APC filter we recommend: R = 150 to 390Ω C = 0.47µF 11 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 ≥ 560Ω 12 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. 13 REFERENCE CP INPUT Reference frequency input from this pin. The reference frequency is 3.58MHz, inserting 270KΩ between this pin to GND. The reference frequency is 4.0MHz, this pin leaving open. Continued on next page. No.A0356-7/10 LA75710VA Continued from preceding page. Pin No. Pin name Function 14 RF AGC OUTPUT RF AGC OUT PUT. This output controls the tuner RF Equivalent circuit AGC. A protective 200Ω 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. 15 1ST SIF INPUT First SIF input. ADC cut capacitor must be used in the 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. 16 IF AGC FILTER 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 0.022µF capacitor as the external capacitor, and other characteristics. 17 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. 18 VIF INPUT 19 VIF amplifier input. The input circuit is a balanced circuit, and the input constants are: R≈1.0kΩ C≈3pF 20 GND Continued on next page. No.A0356-8/10 LA75710VA Continued from preceding page. Pin No. Pin name 21 AFT OUTPUT Function Equivalent circuit 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. R ≥ 22kΩ C = 0.1µF 22 SIF BPF OUTPUT The output to the external bandpass filter is passed through an internal 6dB amplifier before being output. 23 AUDIO OUTPUT Audio FM detector output. A 54KΩ resister is inserted in series with an emitter-follower output. For applications that support mono: Create an external deemphasis circuit. t = C 1×R1 24 AUDIO BIAS FILTER Connection for a filter used to hold the FM detector output DC voltage fixed. Normally, a 1µF 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 24 and GND. No.A0356-9/10 LA75710VA Specifications of any and all SANYO Semiconductor 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 Semiconductor 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 Semiconductor 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. 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Specifications and information herein are subject to change without notice. PS No.A0356-10/10