LA75676VA

Ordering number : EN7868 Monolithic Linear IC LA75676VA Overview IF Signal Processor (VIF+SIF) for TV and VCR Products The LA75676VA is a VIF/SIF IC that supports NTSC intercarrier reception and adopts a semi-adjustment-free design. It is 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. It uses a PLL technique for FM detection. It features the 5V supply voltage appropriate for multimedia products. In addition, it achieves superb audio quality by incorporating a buzz canceller that suppresses Nyquist buzzing. Functions • VIF block: VIF amplifier, buzz canceller, PLL detector, IF AGC, RF AGC, AFT, and an equalizer amplifier • SIF block: Limiter amplifier, PLL FM detector Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Circuit voltage Circuit current Symbol VCC max V13, V17 I6 I10 I24 Allowable power dissipation Operating temperature Storage temperature Pd max Topr Tstg Ta ≤ 70°C * Mounted on a board Conditions Ratings 6 VCC -3 -10 -2 600 -20 to +70 -55 to +150 Unit V V mA mA mA mW °C °C * When mounted on a 114.3×76.1×1.6mm3 glass epoxy board. Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Ratings 5 4.5 to 5.5 Unit V V Any and all SANYO Semiconductor 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 Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. 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. N1506 MS PC B8-6591, B8-6996 No.7868-1/10 LA75676VA Electrical Characteristics at Ta = 25°C, VCC = 5V, fp = 45.75MHz Parameter [VIF Block] Circuit current Maximum RF AGC voltage Minimum RF AGC voltage Input sensitivity AGC range Maximum allowable input Video output voltage (no input) Sync signal tip voltage Video output level Black noise threshold voltage Black noise clamp voltage Video signal-to-noise ratio C-S beating Frequency characteristics Differential gain Differential phase AFT voltage (no signal) Maximum AFT voltage Minimum AFT voltage AFT detection sensitivity VIF input resistance VIF input capacitance APC pull-in range (U) APC pull-in range (L) AFT tolerance frequency 1 VCO 1 maximum range (U) VCO 1 maximum range (L) VCO control sensitivity [SIF BLOCK] Limiting sensitivity FM detection output voltage* AMR Total harmonic distortion SIF signal-to-noise ratio 4.5MHz output level Vli (lim) VO (FM) AMR THD S/N (FM) Vsout SIF IN 80dBµV 59 87 4.5MHz ±25kHz 39 400 50 45 520 60 0.3 64 94 101 0.8 51 660 dBµV mVrms dB % dB dBµV I5 V14H V14L Vi GR Vi max V6 V6tip VO VBTH VBCL S/N IC-S fc DG DP V13 V13H V13L Sf Ri Ci fpu fpl dfa 1 dfu dfl B 1.3 -150 1.5 45.75MHz 45.75MHz 1.3 28 2.0 4.0 6MHz S1 = OFF 32 58 95 3.5 0.9 1.7 0.5 1.6 48 38 -3 33 VCC-0.5 41 VCC 0 38 63 100 3.8 1.2 2 0.8 1.9 52 43 -1.5 3 3 2.5 4.4 0.18 40 1.5 3 2.0 -2.0 0 2.0 -2.0 2.7 -1.5 5.4 -1.4 +150 6.5 5 3.0 5.0 1.0 52 4.1 1.5 2.3 1.1 2.2 0.5 44 49 mA V V dBµV dB dBµV V V Vp-p V V dB dB dB % °C V V V mV/kHz kΩ pF MHz MHz kHz MHz MHz kHz/mV Symbol Conditions min Ratings typ max Unit * : 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. No.7868-2/10 LA75676VA Package Dimensions unit : mm (typ) 3287 6.5 24 13 700 Pd max -- Ta When mounted on a 114.3×76.1×1.6mm3 glass epoxy board Allowable power dissipation, Pd max – mW 600 500 4.4 6.4 400 0.5 300 1 0.5 (0.5) 0.22 12 0.15 200 100 0 --20 1.5max 0 20 40 60 80 100 0.1 (1.3) Ambient temperature, Ta – ˚C SANYO : SSOP24(225mil) Pin Assignment SIF INPUT BIAS FILTER 1 2 3 4 24 FM DET OUT 23 FM FILTER 22 BPF OUT 21 RF AGC VR 20 GND SIF OUT NC VCC VIDEO OUT EQ FILTER EQ INPUT APC FILTER VIDEO DET OUT VCO COIL VCO COIL 5 6 7 8 9 10 11 12 LA75676VA 19 VIF INPUT 18 VIF INPUT 17 1st AGC FILTER 16 2nd AGC FILTER 15 2nd AGC FILTER 14 RF AGC OUT 13 AFT OUT No.7868-3/10 LA75676VA Block Diagram and AC Characteristics Test Circuit 4.5MHz OUT (E) RF AGC VR 0.01µF 10kΩ-B FM DET (D) 7.5kΩ 1µF + VIF IN 51Ω 9V IF AGC 0.015µF (M) 1000pF RF AGC OUT (F) AFT OUT (B) V 120kΩ 120kΩ AFT VCO 9 0.47µF + 0.01µF 0.01µF 0.01µF (M) 0.01µF 24 23 22 21 20 19 18 17 16 6.6kΩ 15 330pF GND 14 0.01µF 11 24pF 13 FM DET RF AGC IF AGC VIF AMP VIDEO DET 9dB HPF LIM AMP EQ AMP 1 0.01µF 51Ω 2 3 4 + 5 0.01µF 6 7 8 10 12 1µF + 100kΩ 1.5kΩ S1 330Ω 2nd SIF IN SIF OUT VIDEO OUT (A) 150Ω 560Ω VCC GND Test Circuit (Input inpedance) Impedance analyzer VIF IN 0.01µF 0.01µF 0.01µF 0.01µF 0.01µF 0.01µF 0.01µF 0.01µF 10kΩ 0.01µF 24 23 22 21 20 19 18 17 16 15 14 13 LA75676VA 1 2 3 4 5 6 7 8 9 10 11 12 0.01µF 330Ω 0.01µF 0.01µF 100µF + VCC No.7868-4/10 LA75676VA Test Conditions V1. Circuit current • • • • [15] 1. Internal AGC 2. Input a 45.75MHz, 10mVrms, CW signal to the VIF input pin. 3. RF AGC Vr maximum 4. Connect a current meter to VCC and measure the current flowing into the IC. V2, V3. Maximum RF AGC voltage, minimum RF AGC voltage • • • • [V9H, V9L] 1. Internal AGC 2. Input a 45.75MHz, 10mVrms, CW signal to the VIF input pin. 3. Vary the RF AGC Vr and, at the maximum resistance, measure the maximum RF AGC voltage. (F) 4. Vary the RF AGC Vr and, at the minimum resistance, measure the maximum RF AGC voltage. (F) V4. Input sensitivity • • • • [Vi] 1. Internal AGC 2. fp = 45.75MHz, 400Hz 40% AM (VIF input) 3. Set S1 to the off position and pass the input through a 100kΩ resistor. 4. Measure the VIF input level such that the 400Hz detection output level at test point A becomes 0.64Vp-p. V5. AGC range • • • • [GR] 1. External AGC. Apply the VCC voltage to the IF AGC input (pin 17). 2. With the same conditions as used for V4, measure the VIF input level such that the detection output level becomes 0.64Vp-p. • • • Vi1 Vi1 3. GR = 20log Vi dB V6. Maximum allowable input • • • • [Vi max] 1. Internal AGC 2. fp = 45.75MHz, 15kHz 78% AM (VIF input) 3. Measure the VIF input level such that the detection output level at test point A is ±1dB of the video output (Vo). V7. Video output voltage (no input) • • • • [V6] 1. External AGC. Apply the VCC voltage to the IF AGC input (pin 17). 2. Measure the video output (A) DC voltage. V8. Sync signal tip voltage • • • • [V6tip] 1. Internal AGC 2. 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 2. fp = 45.75MHz, 15kHz 78% AM Vi = 10mVrms (VIF input) 3. Measure the wave height of the detection output level at test point A. (Vp-p) No.7868-5/10 LA75676VA V10, V11. Black noise threshold and clamp voltages • • • • [VBTH, VBCL] 1. Apply a DC voltage to the external AGC IF input (pin 17) and vary that voltage. 2. fp = 45.75MHz, 400Hz, 40% AM, 10mVrms (VIF input) 3. Vary the IF AGC (pin 17) voltage so that the noise canceller operates. Measure VBTH and VBCL at test point A. VBCL Video output (V) VBTH Time V12. Video signal-to-noise ratio • • • • [S/N] 1. Internal AGC 2. fp = 45.75MHz, CW, 10mVrms (VIF input) 3. Measure the noise voltage as an RMS level at test point A after passing through a 10kHz to 4MHz bandpass filter. This is the noise voltage (N). Video component (Vp-p) 1.12Vp-p 4. S/N = 20log Noise voltage (Vrms) = 20log Noise voltage = (dB) V13. C/S beating • • • • [ICS] 1. Apply a DC voltage to the external AGC IF input (pin 17) and vary that voltage. 2. fp = 45.75MHz, CW ; 10mVrms fc = 42.17MHz, CW ; 10mVrms - 10dB fs = 41.25MHz, CW ; 10mVrms - 10dB 3. Vary the IF AGC (pin 17) voltage to adjust the output level at test point A to be 1.3Vp-p. 4. Measure the difference in level between the 3.58MHz and the 0.92MHz components at test point A. C/S beating Output (dB) 0.92MHz 3.58M 4.5M Frequency (MHz) No.7868-6/10 LA75676VA V14. Frequency characteristics • • • • [fc] 1. Apply a DC voltage to the external AGC IF input (pin 17) and vary that voltage. 2. SG1 : 45.75MHz, CW, 10mVrms SG2 : from 45.65MHz to 39.75MHz, CW, 2mVrms Add SG1 and SG2 using a T pad, adjust the signal generator levels to those listed above, and apply the result to VIF IN. 3. First, set the SG2 frequency to 45.65MHz. Next, adjust the IF AGC voltage (pin 17) so that the output level at test point A becomes 0.5Vp-p. • • V1 4. Set the SG2 frequency to 39.75MHz and measure the output level. • • V2 5. Perform the following calculation. V2 fc = 20log V1 (dB) V15, V16. Differential gain and differential phase • • • • [DG, DP] 1. Internal AGC 2. fp = 45.75MHz, APL 50%, 87.5% video signal, Vi = 10mVrms 3. Measure DG and DP at test point A. V17. AFT voltage (no signal) • • • • V13 1. Internal AGC 2. Measure the DC voltage on the AFT output (B). V18, V19, V20. Maximum AFT voltage, minimum AFT voltage, AFT detection sensitivity • • • • [V13H, V13L, Sf] 1. Internal AGC 2. fp = 45.75MHz, ±1.5MHz sweep, 10mVrms (VIF input) 3. 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 = 2000 (mV) mV/kHz ∆f (kHz) ∆f AFT output (V) V13H V1 ; 3.5V V2 ; 1.5V V13L IF frequency (MHz) No.7868-7/10 LA75676VA V21, V22. VIF input resistance, input capacitance • • • • [Ri, Ci] 1. Use an impedance analyzer to measure Ri and Ci in the input impedance test circuit. V23, V24. APC pull-in range • • • • [fpu, fpl] 1. Internal AGC 2. fp = 39MHz to 51MHz, CW : 10mVrms 3. Vary the signal generator from fp = 45.75MHz towards higher frequencies until PLL lock is lost. Note : PLL lock is lost at the point beating is output at test point A. 4. Lower the signal generator frequency until the PLL locks again. (f1) 5. Lower the signal generator frequency until PLL lock is lost. 6. Raise the signal generator frequency until the PLL locks again. (f2) 7. Perform the following calculations. fpu = f1 - 45.75MHz fpl = f2 - 45.75MHz V25. AFT tolerance frequency 1 • • • • [∆Fa1] 1. Internal AGC 2. SG1 : Vary this frequency from 43.75MHz to 47.75MHz, CW, 10mVrms 3. Vary the SG1 frequency so that the AFT output (test point B) becomes 2.5V. Record the SG1 frequency at that point as f1. 4. External AGC (Adjust V17.) 5. Apply 5V to the IF AGC (pin 17), pick up the VCO oscillator frequency from ground or some other point, and measure that frequency. f2 6. Perform the following calculation. AFT tolerance frequency 1 ∆Fa1 = f2 - f1 (kHz) V26, V27. VCO maximum range (U, L) • • • • [dfu, dfl] 1. External AGC. Apply the VCC voltage to the IF AGC (pin 17). 2. 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 1V to the APC pin (pin 9) and let fl be the frequency at that time. Similarly, apply 5V and let fu be the frequency at that time. dfu = fu - 45.75MHz dfl = fl - 45.75MHz V28. VCO control sensitivity • • • • [β] 1. External AGC. Apply the VCC voltage to the IF AGC (pin 17). 2. 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. f2 - f1 β = 400 (kHz/mV) No.7868-8/10 LA75676VA S1. SIF limiting sensitivity • • • • [Vi (lim)] 1. External AGC. Apply the VCC voltage to the IF AGC (pin 17). 2. fs = 4.5MHz, fm = 400Hz, ∆F = ±25kHz (SIF input) 3. Set the SIF input level to 100mVrms and measure the value at test point D at that time. • • V1 4. Lower the SIF input level and measure the input level such that V1 is down by 3dB. S2, S4. FM detection output voltage, total harmonic distortion • • • • [Vo(FM), THD] 1. External AGC. Apply the VCC voltage to the IF AGC (pin 17). 2. fs = 4.5MHz, fm = 400Hz, ∆F = ±25kHz (SIF input, Vi = 100mVrms) 3. Measure the FM detection output voltage and total harmonic distortion at test point D. S3. AM rejection ratio • • • • [AMR] 1. External AGC. Apply the VCC voltage to the IF AGC (pin 17). 2. fs = 4.5MHz, fm = 400Hz, AM = 30% (SIF input, Vi = 90dBµV) 3. Measure the output voltage at test point D. • • • VAM 4. AMR = 20log VO (DET) VAM dB S5. SIF signal-to-noise ratio • • • • [S/N] 1. External AGC (V17 = VCC) 2. fs = 4.5MHz, no modulation, Vi = 100mVrms 3. Measure the output voltage at test point D. • • • • Vn 4. S/N = 20log VO (DET) dB Vn S6. 4.5MHz output level • • • • [S/N] 1. External AGC (V17 = VCC) 2. fs = 4.5MHz, no modulation, Vi = 10mVrms 3. Measure the output voltage at test point E. • • • • Vsout Note 1. Unless specified otherwise, when measuring VIF, apply the VCC 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. No.7868-9/10 LA75676VA 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. 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Specifications and information herein are subject to change without notice. PS No.7868-10/10