la75676va Sanyo Semiconductor Corporation, la75676va Datasheet
la75676va
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la75676va Summary of contents
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... LA75676VA Overview The LA75676VA is a VIF/SIF IC that supports NTSC intercarrier reception and adopts a semi-adjustment-free design provided in the SSOP24 (225mil, 0.5mm lead pitch) package, which is appropriate for miniature 2-in-1 tuner products. In the VIF block, it adopts a design that uses AFT adjustment to obviate the need for VCO adjustment, and thus can simplify the adjustment steps required in end product manufacturing ...
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... V O (FM) AMR AMR Total harmonic distortion THD SIF signal-to-noise ratio S/N (FM) 4.5MHz output level Vsout * : If a wider FM detection output dynamic range is required, insert a resistor and capacitor in series between pin 23 and ground to adjust the level. LA75676VA Conditions OFF fc 6MHz 45.75MHz 45.75MHz B 4.5MHz ± ...
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... VIDEO DET OUT VCO COIL VCO COIL LA75676VA 700 600 500 400 300 200 100 0 -- LA75676VA max -- Ta When mounted on a 114.3×76.1×1.6mm glass epoxy board Ambient temperature, Ta – ˚ DET OUT 23 ...
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... VIF RF IF AMP AGC VIDEO DET HPF EQ AMP 330Ω VIDEO OUT ( A ) Impedance analyzer VIF LA75676VA AFT VCO 24pF AGC OUT ( F ) AFT OUT ( GND V CC ...
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... Input a 45.75MHz, 10mVrms, CW signal to the VIF input pin. 3. Measure the video output (A) DC voltage. V9. Video output level • • • • [Vo] 1. Internal AGC 45.75MHz, 15kHz 78 10mVrms (VIF input) 3. Measure the wave height of the detection output level at test point A. (Vp-p) LA75676VA No.7868-5/10 ...
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... CW ; 10mVrms - 10dB fs = 41.25MHz 10mVrms - 10dB 3. Vary the IF AGC (pin 17) voltage to adjust the output level at test point 1.3Vp-p. 4. Measure the difference in level between the 3.58MHz and the 0.92MHz components at test point A. Output (dB) LA75676VA VBCL VBTH Time 1.12Vp-p Noise voltage = (dB) C/S beating 0 ...
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... Record the maximum voltage as V13H and the minimum voltage as V13L. 4. Measure the frequency shift for the change in voltage at test point B from V1 to V2. • • ∆f Sƒ = AFT output (V) LA75676VA 2000 (mV) mV/kHz ∆f (kHz) ∆f V13H V1 ...
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... Pick up the VCO oscillator frequency from the video output (A), ground, or some other point and adjust the VCO coil so that frequency becomes 45.75MHz. 3. Apply 3V to the APC pin (pin 9) and let f1 be the frequency at that time. Similarly, apply 3.4V and let f2 be the frequency at that time β = 400 (kHz/mV) LA75676VA No.7868-8/10 ...
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... Measure the output voltage at test point E. • • • • Vsout Note 1. Unless specified otherwise, when measuring VIF, apply the V CC voltage to the AGC and adjust the VCO coil so that it oscillates at 45.75MHz. Note 2. Unless specified otherwise, switch SW1 must be in the on position. LA75676VA No.7868-9/10 ...
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... SANYO Semiconductor 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, 2006. Specifications and information herein are subject to change without notice. LA75676VA PS No.7868-10/10 ...