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Ordering number : ENA0325
Monolithic Linear IC
LA75600VA
Overview
IF Signal Processing (VIF/SIF) IC for use in TV/VCR Applications
The LA75600VA is a NTSC intercarrier support VIF/SIF signal-processing IC that makes the minimum number of adjustments possible. The VIF block adopts a technique that makes AFT adjustment unnecessary by adjusting the VCO, thus simplifying the adjustment steps in the manufacturing process. PLL detection is adopted in the FM detector to support multi-format audio detection. A 5V power-supply voltage is used to match that used in most multimedia systems. In addition,these ICs also include a buzz canceller to suppress Nyquist buzz and provide high audio quality.
Functions
* VIF Block :VIF Amplifier, Buzz Canceller, PLL Detector, IF AGC, RF AGC, AFT, Equalizer Amplifier * SIF Block :Limiter Amplifier, PLL FM detector
Specitications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Circuit voltage Circuit current Symbol VCC max V13, V17 I6 I10 Allowable dissipation Operating temperature Storage temperature Pd max Topr Tstg Ta70C * Conditions Ratings 6 VCC -3 -10 640 -20 to +70 -55 to +150 Unit V V mA mA W C C
* Mounted on a board:114.3x76.1x1.6mm3 glass epoxy board.
Recommended Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage 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 usingany 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.
00000 / 60506 MS OT 20060125-S00004 No.A0325-1/16
LA75600VA
Electrical Characteristics at Ta = 25C, 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 No-signal video output voltage Sync. signal tip voltage Video output level Black noise threshold voltage Black noise clamp voltage Video S/N C-S beat Frequency characteristics Differential gain Differential phase No-signal AFT voltage 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 VCO1 maximum variable range (U) VCO1 maximum variable range (L) VCO control sensitivity RF AGC input level [SIF block] Limiting sensitivity FM detection output voltage AMR Distortion factor SIF S/N 4.5MHz output level Vli(lim) VO(FM) AMR THD S/N(FM) Vsout SIF IN 80dBV 4.5MHz 15kHz 4.5MHz 25kHz S1 S2 S3 S4 S5 S6 59 87 39 767 50 45 1000 60 0.5 64 94 101 1.0 51 1280 dBV mVrms dB % dB dBV 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 fa1 dfu dfl B ViRFAGC R = 5.1k 45.75MHz 45.75MHz 6MHz S1 = OFF V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11 V12 V13 V13 V15 V16 V17 V18 V19 V20 V21 V22 V23 V24 V25 V26 V27 V28 V29 1.3 87 -150 1.0 1.3 2.0 4.0 0 19 32 51 95 3.1 0.8 1.7 0.3 1.3 48 38 -3 35 VCC-0.5 42 VCC 0 38 56 100 3.4 1.1 2.0 0.5 1.6 52 43 -1.5 3.0 3 2.5 4.4 0.18 29 1.5 3 2.0 -2.0 0 1.5 -2.0 2.7 94 -1.5 5.4 101 -1.4 +150 6.5 5 3.0 5.0 1.0 38 3.7 1.4 2.3 0.7 1.9 0.5 44 52 mA V V dBV dB dBV V V Vp-p V V dB dB dB % deg V V V mV/kHz k pF MHz MHz kHz MHz MHz kHz/mV dBV Symbol Conditions No. min Ratings typ max Unit
*:If the dynamic range of the FM detection output needs to be widened, connect a resistor and a capacitor in series between pin 23 and GND for level adjustment. *:The resistor between pin10 and GND must be 470 or more.
No.A0325-2/17
LA75600VA
Package Dimensions
unit : mm 3287
6.5 24 13
4.4
6.4
1 0.5 (0.5) 0.22
12 0.15
SANYO : SSOP24(225mil)
Pin Assignment
0.1 (1.3)
1.5max
0.5
No.A0325-3/17
LA75600VA
Block Diagram and AC Characteristics Test Circuit
Test Circuit Input impedance test circuit (VIF, 1st SIF input impedance)
No.A0325-4/17
LA75600VA
Test Conditions V1. Circuit current ...... [I5] (1) Internal AGC (2) Input a 45.75MHz 10mVrms continuous wave to the VIF input pin. (3) RF AGC Vr MAX (4) Connect an ammeter to the VCC and measure the incoming current. V2. V3. Maximum RF AGC voltage, Minimum RF AGC voltage ...... [V14H, V14L] (1) Internal AGC (2) Input a 45.75MHz 10mVrms continuous wave to the VIF input pin. (3) Adjust the RF AGC Vr (resistance value max.) and measure the maximum RF AGC voltage. (F) (4) Adjust the RF AGC Vr (resistance value min.) and measure the minimum RF AGC voltage. (F) V4. Input sensitivity ...... [Vi] (1) Internal AGC (2) fp = 45.75MHz 15kHz 78% AM (VIF input) (3) Turn off the S1 and put 100k through. (4) VIF input level at which the 400Hz detection output level at test point A becomes 0.64Vp-p. V5. AGC range ...... [GR] (1) Apply the VCC voltage to the external AGC, IF AGC (pin 17). (2) In the same manner under the same conditions as for V4 (input sensitivity), measure the VIF input level at which the detection output level becomes 0.64Vp-p - Vil. (3) V6. Maximum allowable input ...... [Vi max] (1) Internal AGC (2) fp = 45.75MHz 15kHz 78% AM (VIF input) (3) VIF input level at which the detection output level at test point A becomes video output (VO) 1dB. V7. No-signal video output voltage ...... [V6] (1) Apply the VCC voltage to the external AGC, IF AGC (pin 17). (2) Measure the DC voltage at the VIDEO output (A). V8. Sync. signal tip voltage ...... [V6tip] (1) Internal AGC (2) Input a 45.75MHz 10mVrms continuous wave to the VIF input pin. (3) Measure the DC voltage at the VIDEO output (A). V9. Video output level ...... [VO] (1) Internal AGC (2) fp = 45.75MHz 15kHz 78% AM Vi = 10mVrms (VIF input) (3) Measure the peak value of the detection output level at test point A. (Vp-p)
No.A0325-5/17
LA75600VA
V10. V11 Black noise threshold level and clamp voltage ...... [VBTH, VBCL] (1) Apply DC voltage to the external AGC, IF AGC (pin 17) and vary it. (2) fp = 45.75MHz 15kHz 78% AM10mVrms (VIF input) (3) Adjust the IF AGC (pin 17) voltage to operate the noise canceller. Measure the VBTH, VBCL at test point A.
Video output (V)
VBCL
VBTH Time
V12. Video S/N ...... [S/N] (1) Internal AGC (2) fp = 45.75MHz continuous wave = 10mVrms (VIF input) (3) Measure the noise voltage at test point A in RMS volts through a 10kHz to 4MHz band-pass filter. ......Noise voltage (N) (4)
V13. C/S beat ...... [IC-S] (1) Apply DC voltage to the external AGC IF AGC (pin 17) and vary it. (2) fp = 45.75MHz continuous wave;10mVrms fc = 42.17MHz continuous wave;10mVrms - 10dB fs = 41.25MHz continuous wave;10mVrms - 10dB (3) Adjust the IF AGC (pin 17) voltage so that the output level at test point A becomes 1.3Vp-p. (4) Measure the difference between the levels for 3.58MHz and 0.92MHz components at test point A.
C/S beat Output (dB)
0.92MHz
3.58M 4.5M
Frequency (MHz)
No.A0325-6/17
LA75600VA
V14. Frequency characteristics ...... [fc] (1) Apply DC voltage to the external AGC IF AGC (pin 17) and adjust the voltage. (2) SG1:45.75MHz continuous wave 10mVrms SG2:45.65MHz to 39.75MHz continuous wave 2mVrms Add the SG1 and SG2 signals using a T pat and adjust each SG signal level so that the above-mentioned levels are reached, and input the added signals to the VIF IN. (3) First set the SG2 frequency to 45.65MHz, and then adjust the IF AGC voltage (V17) 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) Calculate as follows: V15. V16. Differential gain, Differential phase ...... [DG, DP] (1) Internal AGC (2) fp = 45.75MHz APL50% 87.5% modulation video signal Vi = 10mVrms (3) Measure the DG and DP at test point A V17. No-signal AFT voltage ...... [V13] (1) Internal AGC (2) Measure the DC voltage at the AFT output (B). V18.V19.V20 Maximum minimum AFT output voltage, AFT detection sensitivity ...... [V13H, V13L, Sf] (1) Internal AGC (2) fp = 45.75MHz 1.5MHz Sweep = 10mVrms (VIF input) (3) Maximum voltage ...... V10H, minimum voltage ...... V10L (4) Measure the frequency deviation at which the voltage at test point VB changes from V1 to V2 ...... f
AFT output (V)
f V13H V1;3.5V
V2;1.5V V13L
IF frequency (MHz)
V21.V22 VIF input resistance, Input capacitance ...... [Ri, Ci] (1) Referring to the input impedance Test Circuit, measure Ri and Ci with an impedance analyzer.
No.A0325-7/17
LA75600VA
V23.V24 APC pull-in range ...... [fpu, fpl] (1) Internal AGC (2) fp = 39MHz to 51MHz continuous wave ; 10mVrms (3) Adjust the SG signal frequency to be higher than fp = 45.75MHz to bring the PLL to unlocked state. Note; The PLL is assumed to be in unlocked state when a beat signal appears at test point A. (4) When the SG signal frequency is lowered, the PLL is brought to locked state again. ...... f1 (5) Lower the SG signal frequency to bring the PLL to unlocked state. (6) When the SG signal frequency is raised, the PLL is brought to locked state again. ...... f2 (7) Calculate as follows: fpu = f1 - 45.75MHz fpl = f2 - 45.75MHz V25. AFT tolerance frequency 1 ...... [fa1] (1) Internal AGC (2) SG1:43.75MHz to 47.75MHz variable continuous wave 10mVrmns (3) Adjust the SG1 signal frequency so that the AFT output DC voltage (test point B) becomes 2.5V; that SG1 signal frequency is f1. (4) External AGC (Adjust the V17.) (5) Apply 9V to the IFAGC (pin 17) and then pick up the VCO oscillation frequency from the GND, etc.; that frequency is f2. (6) Calculate as follows: AFT tolerance frequency fa1 = f2 - f1 (kHz) V26.V27 VCO Maximum variable range (U, L) ...... [dfu, dfl] (1) Apply the VCC voltage to the external AGC, IF AGC (pin 17). (2) Pick up the VCO oscillation frequency from the VIDEO output (A), GND, etc. and adjust the VCO coil so that the frequency becomes 45.75MHz. (3) fl is taken as the frequency when 1V is applied to the APC pin (pin 9). In the same manner, fu is taken as the frequency when 5V is applied to the APC pin (pin 9). dfu = fu - 45.75MHz dfl = fl - 45.75MHz V28. VCO control sensitivity ...... [] (1) Apply the VCC voltage to the external AGC, IF AGC (pin 17). (2) Pick up the VCO oscillation frequency from the VIDEO output (A), GND, etc. and adjust the VCO coil so that the frequency becomes 45.75MHz. (3) f1 is taken as the frequency when 2.8V is applied to the APC pin (pin 9). In the same manner, f2 is taken as the frequency when 3.0V is applied to the APC pin (pin 9).
V29. RF AGC input level ...... [ViRFAGC] (1) Internal AGC. (2) fp = 45.7MHz continuous wave (VIF input) (3) Measure the input level at which the pin 14 voltage becomes 2.5V with the RF AGC resistance (pin 21 to GND) being 5.1k. S1. SIF limiting sensitivity ...... [Vi(lim)] (1) Apply the VCC voltage to the external AGC, IF AGC (pin 17). (2) fs = 4.5MHz fm = 400Hz f = 25kHz (SIF input Vi = 100mVrms) (3) Set the SIF input level to 100mVrms and measure the level attest point D. ......V1 (4) Lower the SIF input level and measure the input level that becomes V1 - 3dB. S2.S4 FM detection output voltage, Distortion factor ...... [VO(FM), THD] (1) Apply the VCC voltage to the external AGC, IF AGC (pin 17). (2) fs = 4.5MHz fm = 400Hz f = 25kHz (SIF input) (3) Measure the FM detection output voltage and the distortion rate at test point D.
No.A0325-8/17
LA75600VA
S3. AM rejection ratio ...... [AMR] (1) Apply the VCC voltage to the external AGC, IF AGC (pin 17). (2) fs = 4.5MHz fm = 400Hz AM = 30% (SIF input Vi = 100mVrms) (3) Measure the output level at test point D. ......VAM (4) S5. SIF S/N ...... [S/N] (1) External AGC (V17 = VCC). (2) fs = 4.5MHz NO MOD Vi = 100mVrms (3) Measure the output level at test point D. ......Vn (4) S6. 4.5MHz output level ...... [Vsout] (1) External AGC (V17 = VCC). (2) fs = 4.5MHz NO MOD Vi = 10mVrms (3) Measure the output level at test point E. ......Vsout
Note 1) Unless otherwise specified for VIF test, apply the VCC voltage to the IF AGC and adjust the VCO coil so that oscillation occurs at 45.75MHz. Note 2) Unless otherwise specified, turn ON the SW1.
No.A0325-9/16
LA75600VA
Sample Application Circuit
NT INTER
No.A0325-10/16
LA75600VA
Pin Function
Pin No. 1 Pin name SIF INPUT SIF input. The input impedance is about 1k. Since interference signals* entering this input can result in buzzing and beat signals, the pattern layout for the signal input to this pin must be designed carefully. *: Signals that can interfere with audio include video and chrominance signals. Thus the VIF carrier signal can cause interference. Function Equivalent circuit
2
BIAS FILTER
The FM detector signal-to-noise ratio can be improved by inserting a filter in the FM detector bias line. C1 must be 0.47F or higher, and we recommend 1F. If the FM detector is not used, a 2 k resistor must be inserted between pin 2 and ground. This stops the FM detector VCO circuit.
3
SIF OUT
Outputs the intercarrier detector output that has been passed through a high-pass filter. (4.5MHz output)
4 5
NC VCC
This pin should be left open. Use lines that are as short as possible for VCC / ground decoupling.
Continued on next page.
No.A0325-11/16
LA75600VA
Continued from preceding page.
Pin No. 6 7 8 Pin name VIDEO OUT EQ FILTER EQ INPUT Equalizer circuit. This circuit corrects the frequency characteristics of the video signal. Pin 8 is the input to the EQ amplifier. The EQ amplifier takes a 1.5Vp-p video signal as its input and amplifies that to a 2.0Vp-p level. * Notes on the equalizer amplifier design. The equalizer amplifier is designed as a voltage follower amplifier with a gain of about 2.3dB. If frequency characteristics correction is required, insert the capacitor, inductor, and resistor between pin 7 and ground in series. * Using the equalizer amplifier. If the input signal is Vi and the output signal Vo, then Function Equivalent circuit
G: Gain of the voltage follower amplifier Vin: Imaginary voltage G: About 2.3 dB Assuming Vin 0, then AV will be:
R1 is an IC internal 1k resistor. Simply select a value of Z according to the desired characteristics. However, note that the equalizer amplifier gain will be a maximum at the Z resonance, so care is required to prevent distortion from occurring.
9
APC FILTER
PLL detector APC filter connection. The APC time constant is switched internally by the IC. When locked, the VCO is controlled by the route A, and the gain is reduced. When unlocked or during weak field reception, the VCO is controlled by the route B, and the gain is increased. We recommend the following values for this APC filter: R = 150 to 390 C = 0.47F
Continued on next page.
No.A0325-12/16
LA75600VA
Continued from preceding page.
Pin No. 10 Pin name VIDEO DET OUT Function Outputs a video signal that includes the SIF carrier. A resistor must be inserted between pin 10 and ground to acquire adequate drive capability. R 470 Equivalent circuit
11 12
VCO COIL VCO COIL
VCO tank circuit for video detection. This VCO is a vector synthesis VCO circuit.
13
AFT OUT
AFT output. This circuit includes a function that controls the AFT voltage so that it naturally goes to the center voltage during weak field reception.
14
RF AGC OUT
RF AGC output. This output controls the tuner RF AGC. The internal circuit includes both a 30k pull-up resistor and a 100 protective resistor. Determine the value of the external bleeder resistor to match the specifications of the tuner.
Continued on next page.
No.A0325-13/16
LA75600VA
Continued from preceding page.
Pin No. 15 16 17 Pin name 2nd AGC FILTER 2nd AGC FILTER 1st AGC FILTER Function IF AGC filter connection. The AGC voltage is created by smoothing the signal that results from peak detection by the AGC detector at pins 17 (first AGC), and 15 and 16 (second AGC). The video signal input to this IF AGC detector is a signal that was passed through the audio trap circuit. Equivalent circuit
18 19
VIF INPUT VIF INPUT
VIF amplifier input. The input circuit is a balanced input, and its input impedance is due to the following component values. R 1.5k C 3pF
20 21
GND RF AGC VR RF AGC adjustment. This pin sets the tuner's RF AGC operating point. Both the FM output and the video output can be muted by setting this pin to the ground level.
Continued on next page.
No.A0325-14/16
LA75600VA
Continued from preceding page.
Pin No. 22 Pin name BPF OUT Band-pass filter output. The output to the external band-pass filter is passed through an internal amplifier before being output. Function Equivalent circuit
23
FM FILTER
Filter that holds the FM detector output DC voltage fixed. Normally, a 1F electrolytic capacitor is used. If the low band (around 50Hz) frequency characteristics are of concern, this value should be increased. The FM detection output level can be reduced and the FM dynamic range improved by inserting the resistor R in series with the capacitor between pin 23 and ground.
24
FM DET OUT
Audio FM detector output. This is an emitter-follower circuit with a 300 resistor inserted in series. * Stereo applications. In some application that provide input to a stereo decoder, the input impedance may be reduced, resulting in distortion in the L-R signal and degraded stereo characteristics. If this problem occurs, add a resistor between pin 24 and ground. R1 5.1k * Mono applications. Construct an external de-emphasis circuit. t = CxR2
No.A0325-15/16
LA75600VA
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This catalog provides information as of June, 2006. Specifications and information herein are subject to change without notice.
PS No.A0325-16/16

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