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Ordering number : EN5473
Monolithic Linear IC
LA7437, 7437A
Video Signal Processing IC for VHS VCR Systems
Overview
The LA7437, 7437A is a video signal processing singlechip IC that handles the PAL-G, B and I, 4.43 NTSC, and MESECAM formats. IC internal trimming is used to make the LA7437, 7437A is completely adjustment free, and in combination with a special-purpose CCD (the LC89973M) it provides a significant reduction in external components, including the glass delay line. Thus the LA7437, 7437A can significantly reduce the signal processing board manufacturing costs. Furthermore, the LA7437, 7437A supports the NAP format (NTSC to PAL conversion) that is poised to become widespread in Europe, China and other markets.
New built-in functions -- NAP circuit -- AVNS (advanced vertical noise suppresor) -- Automatic QH insertion -- FM AGC * Miniature package (42-pin DIP)
Package Dimensions
unit: mm 3025B-DIP42S
[LA7437, 7437A]
Features
* Completely adjustment free The AGC, carrier, deviation, and PB-Y level are adjustment free. The YC record current can also be made adjustment free by using the LA7437, 7437A as the head amplifier. * Support for NAP and PAL color array correction Full modulation using a balanced modulator allows playback and conversion to PAL format of NTSC signals recorded on tape. * Crosstalk exclusion in combination with a specialpurpose CCD Crosstalk can be excluded without using a glass delay line by combining the LA7437, 7437A with a specialpurpose CCD (the LC89973M). * Minimal number of external components New built-in components: -- Detail enhancer CR -- C-trap in the Y low-pass filter -- Playback C low-pass filter * High performance and multiple functions Linear phase picture controller Double high-pass noise canceller, high-speed AFC, DCC
SANYO: DIP42S
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
41096HA (OT) No. 5473-1/8
LA7437, 7437A
Functions
All VHS format VCR signal processing functions
Luminance Video amp. Feed back clamp Main LPF YNR (AVNS) VCA Sync separator 4.2 V regulator Video AGC amp. Video AGC det. Pre LPF Detail enhancer 1/2 fH carrier shift FM AGC amp. FM AGC det. Double limiter FM demodulator Sub LPF Double high pass noise canceller QV/QH/character insert Main de-emphasis DOC NL emphasis Main emphasis White/dark clip FM modulator Drop out det. NL de-emphasis Picture control Y/C mix 4.43 BPF ACC amp. ACC det. Main converter 1.3 M LPF VXO/XO Side lock det. 3rd lock protector Pre amp. Burst emphasis (NTSC) Killer APC det. AFC det. Pre amp. Burst de-emphasis (NTSC) PB amp. Killer NAP PAL burst sequence - Compensator Carrier balancer Burst gate amp. Chrominance Half H killer BGP generator Killer det. VCO Phase shifter Sub converter 5.06 BPF Burst gate amp.
R/P
REC
PB
APC det. ID det. DCC Trick det. DPLL
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Symbol VCC max Pd max Topr Ta 65C* Conditions Ratings 7.0 1350* -10 to +65 -40 to +150 Unit V mW C C
Storage temperature Tstg Note: * When mounted on a 70 mm by 65 mm, 1.5 mm thickness Bakelite board. The value for the DIP package is 1150 mW.
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage Symbol VCC VCC op Conditions Ratings 5.0 4.8 to 5.5 Unit V V
Operating Characteristics at Ta = 25C, VCC = 5.0 V
Parameter [Record Mode Y System] Record mode current drain EE output level 1 AGC characteristics 1 AGC characteristics 2 AGC characteristics 3 AGC characteristics 4 Sync separator output level Sync separator output pulse width Sync separator output prerecord delay time Sync separator threshold level
Symbol
Conditions
min
typ
max
Unit
ICCR VEE1 AGC1 AGC2 AGC3 AGC4 VSYR PWSYR TSYR THSYR
Input: 1.0 Vp-p video signal Input: 50 Hz system 1.0 Vp-p video signal Input: 50 Hz system 2.0 Vp-p video signal Input: 50 Hz system 0.5 Vp-p video signal Input: 50 Hz system with only SYNC increased 6 dB Input: 50 Hz system with only SYNC decreased 6 dB The SYNC-OUT output pulse wave height The SYNC-OUT output pulse width The SYNC-OUT delay time
100 2.0 2.11 1.99 590 340 3.9 3.9 0.9
130 2.1 2.21 2.09 660 380 4.2 4.2 1.1 -20
160 2.2 2.31 2.19 730 420 4.5 4.6 1.3 -15
mA Vp-p Vp-p Vp-p mVp-p mVp-p V s s dB
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LA7437, 7437A
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Parameter [Record Mode Y System] Pseudo-H insertion level White insertion level VCA detection voltage Record YNR operation EP/LP Y-LPF frequency characteristics 1 Y-LPF frequency characteristics 2 Y-LPF frequency characteristics 3 Y-LPF frequency characteristics 4 FM modulator output level Carrier frequency 1 FM modulator output 2nd harmonic distortion Deviation 1 FM modulator linearity 1/2 fH carrier shift Emphasis gain NL emphasis characteristics 1 NL emphasis characteristics 2 NL emphasis characteristics 3 Main emphases characteristics 1 Main emphases characteristics 2 White clipping level Dark clipping level [Playback Mode Y System] Playback mode current drain Dropout compensation time DOC loop gain Playback Y level FM demodulator linearity Demodulation sensitivity Carrier leakage Playback YNR characteristics LP/EP NL de-emphasis characteristics 1 NL de-emphasis characteristics 2 Double noise canceller characteristics 1 Double noise canceller characteristics 2 Double noise canceller characteristics 3 PIC-CTL hard response characteristics 1 PIC-CTL hard response characteristics 2 PIC-CTL soft response characteristics 1 PIC-CTL soft response characteristics 2 Pseudo-V insertion level (playback) Pseudo-H insertion level (playback) ICCP TDOC GDOC VVOUT LDEM SDEM CL GP-YNR1 GNLDE1 GNLDE2 GWNC1 GWNC2 GWNC3 GPH1 GPH2 GPS1 GPS2 VDP HDP Input: 4 MHz, 600 mVp-p Input: 50% white + CW Input: 158 mVp-p, 2 MHz sine wave Input: 50 mVp-p, 2 MHz sine wave Input: 158 mVp-p, 2 MHz sine wave Input: 50 mVp-p, 2 MHz sine wave Input: 15.8 mVp-p, 2 MHz sine wave Input: 50% video + sine wave f = 1 MHz, 158 mVp-p Input: 50% video + sine wave f = 2 MHz, 158 mVp-p Input: 50% video + sine wave f = 1 MHz, 158 mVp-p Input: 50% video + sine wave f = 2 MHz, 158 mVp-p With 5 V applied to T19A With 2.7 V applied to T19A -2.5 -6.0 -10.5 -1.8 -6.2 -11.7 4.0 6.5 -4.5 -9.0 -150 -300 5H later For playback of an FM signal with a 1.0 MHz deviation 2, 4, 6 MHz 135 0.72 -1.0 2.0 -3.5 0.43 160 0.85 0.0 2.1 0.0 0.48 -40 -3.0 -5.0 -9.0 -1.3 -5.2 -10.7 5.0 7.5 -3.5 -7.0 -50 -200 185 0.98 +1.0 2.2 +3.5 0.53 -35 -3.5 -4.0 -7.5 -0.8 -4.2 -8.7 6.0 8.5 -2.5 -5.0 +50 -100 mA ms dB Vp-p % V/MHz dB dB dB dB dB dB dB dB dB dB dB mV mV HDR WHR VVCA VR-YNR1 YLPF1 YLPF2 YLPF3 YLPF4 VFM FFM1 HMOD DEV1 LMOD CS GEMP GNLEMP1 GNLEMP2 GNLEMP3 GME1 GME2 LWC LDC Input: 0.5 Vp-p, 10 kHz sine wave Input: 500 mVp-p, 2 MHz sine wave Input: 158 mVp-p, 2 MHz sine wave Input: 50 mVp-p, 2 MHz sine wave Input: 100 mVp-p, 500 kHz sine wave Input: 100 mVp-p, 2 MHz sine wave Input: 1.0 Vp-p, white 100% video signal Input: 1.0 Vp-p, white 100% video signal 50 Hz system 0.95 -2 6.5 -0.5 0.5 2.6 4.9 4.9 13.1 176 -55 Input: 50 Hz system standard color bar signal The 1 MHz attenuation with respect to 500 kHz The 2 MHz attenuation with respect to 500 kHz The 3.25 MHz attenuation with respect to 500 kHz The 4.43 MHz attenuation with respect to 500 kHz No input 50 Hz system 1.0 3.7 With 2.7 V applied to T19A With 1.3 V applied to T19A -300 150 2.95 10 -0.5 -1.0 -6 -200 300 3.10 12 0.0 0.0 -4 -33 1.2 3.8 -40 1.00 0 7.8 0.0 1.4 3.8 6.4 5.2 13.6 185 -50 -100 450 3.25 14 +0.5 +1.0 -2 -25 1.4 3.9 -35 1.05 2 9.1 0.5 2.3 5.2 7.9 5.5 14.1 194 -45 mV mV V mVp-p dB dB dB dB Vp-p MHz dB MHz % kHz dB dB dB dB dB dB % % Symbol Conditions min typ max Unit
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No. 5473-3/8
LA7437, 7437A
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Parameter [Record Mode Y System] White insertion level (playback) Sync separator output level Sync separator output pulse width Sync separator output pre-record delay time 4.2 V regulator voltage [Record Mode Chrominance System] Chrominance low band conversion output burst level VXO oscillator level 1 Record ACC characteristics 1 Record ACC characteristics 2 ACC killer on input level ACC killer on output level ACC killer recovery input level VXO control sensitivity APC pull-in range 1 APC pull-in range 2 BGP delay time BGP pulse width AFC pull-in range 1 AFC pull-in range 2 VOR-38 VVXO-R1 ACC-R1 ACC-R2 VACCK-ON VO-ACCK VACCK-OFF SVXO fAPC1 fAPC2 tD tW fAFC1 fAFC2 VOP-11 VOP-25 ACC-P1 ACC-P2 VACK-P VOACK-P CLP GBD VXO-P1 fXO ISLD1 ISLD2 VBNT VB-NAP B-NAP NTSC mode 255 -1.0 -2.0 fXO = f - 4.43361875 (MHz) The 5.06 MHz carrier leakage component NTSC mode -5.25 300 -9 SP mode, input: burst 30 mVp-p SP mode, input: burst 30 mVp-p With the chrominance level increased 6 dB With the chrominance level decreased 6 dB -0.8 -40 255 195 Input: PAL/GBI standard color bar signal, 1 Vp-p 3.1 4.7 +1.0 3.4 4.9 +7.0 -3.7 -1.0 3.8 350 -350 3.7 5.1 Input: PAL/GBI standard color bar signal, 1 Vp-p Input: PAL/GBI standard color bar signal, 1 Vp-p With only the chrominance signal level increased 6 dB With only the chrominance signal level decreased 6 dB -0.5 150 300 190 500 +0.2 -0.1 -26 -60 -20 5.7 7.6 -50 230 700 +0.6 mVp-p mVp-p dB dB dB dB dB Hz/m Hz Hz s s kHz kHz WHP VSYP PWSYP TSYP VREG With 1.3 V applied to T14A The SYNC-OUT output pulse wave height The SYNC-OUT output pulse width 150 3.9 4.2 1.4 4.0 300 4.2 4.5 1.6 4.2 450 4.5 4.8 1.8 4.4 mV V s s V Symbol Conditions min typ max Unit
[Playback Mode Chrominance System] Video output burst level Pin 25 output burst level Playback ACC characteristics 1 Playback ACC characteristics 2 Playback killer on input level Playback killer on chrominance output level Main converter carrier leakage Burst de-emphasis level NT Playback XO output level 1 Playback XO oscillator frequency deviation SLD detector current 1 SLD detector current 2 NTSC playback burst output level NTSC to PAL conversion V axis burst level NTSC to PAL conversion burst level ratio 300 230 +0.5 -0.5 -32 -44 -40 -5.0 450 0 135 135 300 0.0 0.0 345 +1.0 +2.0 -25 -40 -33 -4.75 600 +9 345 265 +0.8 mVp-p mVp-p dB dB dB dB dB dB mVp-p Hz A A mVp-p dB dB
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No. 5473-4/8
LA7437, 7437A LA7437A Control Pin Table
Pin No. 9 40 R/P R/P R 11 P R/P P R/P R P R/P P P Control function Edit YNR (AVNS)-CTL ****** N, C, CTL C-rotary QV/QH CHARA. INS EP/LP/SP SP carrier shift stop NAP NT/MESEC/PAL Trick DOC-off 1.2 VDC or less Through 1.2 VDC or less PAL 2.0 to 2.7 VDC Balanced-mod output 2.0 to 2.7 VDC MESEC 1.5 VDC or less N, C-off 0 to 1.9 VDC Low CH 0.8 VDC or less Through 1.2 VDC or less SP 1.2 to 2.2 VDC CHARA insert 2.0 to 2.7 VDC LP 2.0 to 3.0 VDC N, C-CTL 2.3 VDC or more High CH 2.6 to 3.3 VDC Pedestal insert 3.7 VDC or more QV insert 3.9 VDC or more EP 3.0 VDC or more SP carrier shift stop 3.3 VDC or more NAP-on 3.9 VDC or more NTSC 3.9 VDC or more 4.1 VDC or more 4.0 VDC or more 1.0 VDC to less YNR-off 1.5 to 2.5 VDC YNR-CTL L M H 3.8 VDC or more 3.5 VDC or more YNR (strong) 3.9 VDC or more
17 19 25 28 27 30 33 2
6 R/P PB-H Note: Do not allow pin 3 to fall under 1.5 V. (The chip will enter test mode.)
Function Control in each of the LA7437A Operating Modes
YNR Edit L On SP Off REC LP EP On Off On SP Off PB LP EP On Off Off Off Off Off Off Off Off Off -- -- -- Variable Center Variable Center Variable Center -- -- -- -- -- -- -- -- -- -- Off Off Off Off -- -- -- -- -- -- -- -- -- Center q Center q Off Pin 40 control M Off H Off L Off Detail enhancer Pin 11 control M H L -- NC Pin 11 control M -- H -- -- q (!) q (!) q q -- -- -- -- PIC-CTL 1/2 fH carrier shift
Variable Center
K1 = 0.2 K1 = 0.2 K2 = 0.0 K2 = 0.0 K1 = 0.5 K1 = 0.5 K2 = 0.0 K2 = 0.0
K1 = 0.0 K1 = 0.0 K1 = 0.5 K2 = 0.0 K2 = 0.0 K2 = 0.0 K1 = 0.0 K1 = 0.2 K1 = 0.5 K2 = 0.0 K2 = 0.0 K2 = 0.0 K1 = 0.0 K1 = 0.2 K1 = 0.5 K2 = 0.5 K2 = 0.5 K2 = 0.5
Variable Center Variable Center Variable Center Variable Center
K1 = 0.0 K1 = 0.2 K1 = 0.5 -- -- K2 = 0.5 K2 = 0.5 K2 = 0.5 Note: 1. K1 is the YNR coefficient, K2 is the LNC coefficient 2. Use the 1/2 fH carrier shift entries in parentheses when pin 23 is high. 3. The detail enhancer is off when pin 18 is at the middle level.
No. 5473-5/8
LA7437, 7437A LA7437 Test Circuit
No. 5473-6/8
LA7437, 7437A LA7437 Block Diagram
No. 5473-7/8
LA7437, 7437A
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO 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 December, 1997. Specifications and information herein are subject to change without notice. No. 5473-8/8

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