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 Chrominance 4.43 BPF ACC amp. ACC det. Main converter 1.3 M LPF VXO/XO Side lock det. 3rd lock protector Half H killer BGP generator Killer det. VCO Phase shifter Sub converter 5.06 BPF R/P Video amp. Feed back clamp Main LPF YNR (AVNS) VCA Sync separator 4.2 V regulator NL emphasis Main emphasis White/dark clip FM modulator Pre amp. Burst emphasis (NTSC) Killer APC det. AFC det. Burst gate amp. REC Video AGC amp. Video AGC det. Pre LPF Detail enhancer 1/2 fH carrier shift Drop out det. NL de-emphasis Picture control Y/C mix PB 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 Pre amp. Burst de-emphasis (NTSC) PB amp. Killer NAP PAL burst sequence – Compensator Carrier balancer Burst gate amp. APC det. ID det. DCC Trick det. DPLL Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage Conditions Ratings VCC max Allowable power dissipation Pd max Operating temperature Unit 7.0 Ta ≤ 65°C* 1350* Topr 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. V mW –10 to +65 °C –40 to +150 °C Ratings Unit Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage Conditions VCC Operating supply voltage VCC op 5.0 V 4.8 to 5.5 V Operating Characteristics at Ta = 25°C, VCC = 5.0 V Parameter Symbol Conditions min typ max Unit [Record Mode Y System] Record mode current drain ICCR Input: 1.0 Vp-p video signal 100 130 160 mA EE output level 1 VEE1 Input: 50 Hz system 1.0 Vp-p video signal 2.0 2.1 2.2 Vp-p AGC characteristics 1 AGC1 Input: 50 Hz system 2.0 Vp-p video signal 2.11 2.21 2.31 Vp-p AGC characteristics 2 AGC2 Input: 50 Hz system 0.5 Vp-p video signal 1.99 2.09 2.19 Vp-p AGC characteristics 3 AGC3 Input: 50 Hz system with only SYNC increased 6 dB 590 660 730 mVp-p AGC characteristics 4 AGC4 Input: 50 Hz system with only SYNC decreased 6 dB 340 380 420 mVp-p VSYR Sync separator output level The SYNC-OUT output pulse wave height 3.9 4.2 4.5 V Sync separator output pulse width PWSYR The SYNC-OUT output pulse width 3.9 4.2 4.6 µs Sync separator output prerecord delay time ∆TSYR The SYNC-OUT delay time 0.9 1.1 1.3 µs Sync separator threshold level THSYR –20 –15 dB Continued on next page. No. 5473-2/8 LA7437, 7437A Continued on next page. Parameter Symbol Conditions min typ max Unit [Record Mode Y System] Pseudo-H insertion level ∆HDR With 2.7 V applied to T19A –300 –200 –100 mV White insertion level ∆WHR With 1.3 V applied to T19A 150 300 450 mV 2.95 3.10 3.25 10 12 14 VCA detection voltage VVCA V Record YNR operation EP/LP VR-YNR1 Input: 50 Hz system standard color bar signal Y-LPF frequency characteristics 1 YLPF1 The 1 MHz attenuation with respect to 500 kHz –0.5 0.0 +0.5 Y-LPF frequency characteristics 2 YLPF2 The 2 MHz attenuation with respect to 500 kHz –1.0 0.0 +1.0 dB Y-LPF frequency characteristics 3 YLPF3 The 3.25 MHz attenuation with respect to 500 kHz –6 –4 –2 dB Y-LPF frequency characteristics 4 YLPF4 The 4.43 MHz attenuation with respect to 500 kHz mVp-p dB –33 –25 dB FM modulator output level VFM No input 1.0 1.2 1.4 Vp-p Carrier frequency 1 FFM1 50 Hz system 3.7 3.8 3.9 MHz FM modulator output 2nd harmonic distortion HMOD –40 –35 dB Deviation 1 DEV1 0.95 1.00 1.05 MHz FM modulator linearity LMOD –2 0 2 CS 6.5 7.8 9.1 kHz 1/2 fH carrier shift Emphasis gain GEMP 50 Hz system Input: 0.5 Vp-p, 10 kHz sine wave % –0.5 0.0 0.5 dB NL emphasis characteristics 1 GNLEMP1 Input: 500 mVp-p, 2 MHz sine wave 0.5 1.4 2.3 dB NL emphasis characteristics 2 GNLEMP2 Input: 158 mVp-p, 2 MHz sine wave 2.6 3.8 5.2 dB NL emphasis characteristics 3 GNLEMP3 Input: 50 mVp-p, 2 MHz sine wave 4.9 6.4 7.9 dB 4.9 5.2 5.5 dB Main emphases characteristics 1 GME1 Input: 100 mVp-p, 500 kHz sine wave Main emphases characteristics 2 GME2 Input: 100 mVp-p, 2 MHz sine wave 13.1 13.6 14.1 dB White clipping level LWC Input: 1.0 Vp-p, white 100% video signal 176 185 194 % Dark clipping level LDC Input: 1.0 Vp-p, white 100% video signal –55 –50 –45 % [Playback Mode Y System] Playback mode current drain ICCP 135 160 185 mA Dropout compensation time TDOC 0.72 0.85 0.98 ms DOC loop gain GDOC 5H later –1.0 0.0 +1.0 dB Playback Y level VVOUT For playback of an FM signal with a 1.0 MHz deviation 2.0 2.1 2.2 Vp-p FM demodulator linearity LDEM 2, 4, 6 MHz –3.5 0.0 +3.5 % Demodulation sensitivity SDEM 0.43 0.48 0.53 V/MHz –40 –35 dB –2.5 –3.0 –3.5 dB Carrier leakage CL Input: 4 MHz, 600 mVp-p Playback YNR characteristics LP/EP GP-YNR1 Input: 50% white + CW NL de-emphasis characteristics 1 GNLDE1 Input: 158 mVp-p, 2 MHz sine wave –6.0 –5.0 –4.0 dB NL de-emphasis characteristics 2 GNLDE2 Input: 50 mVp-p, 2 MHz sine wave –10.5 –9.0 –7.5 dB Double noise canceller characteristics 1 GWNC1 Input: 158 mVp-p, 2 MHz sine wave –1.8 –1.3 –0.8 dB Double noise canceller characteristics 2 GWNC2 Input: 50 mVp-p, 2 MHz sine wave –6.2 –5.2 –4.2 dB Double noise canceller characteristics 3 GWNC3 Input: 15.8 mVp-p, 2 MHz sine wave –11.7 –10.7 –8.7 dB PIC-CTL hard response characteristics 1 GPH1 Input: 50% video + sine wave f = 1 MHz, 158 mVp-p 4.0 5.0 6.0 dB PIC-CTL hard response characteristics 2 GPH2 Input: 50% video + sine wave f = 2 MHz, 158 mVp-p 6.5 7.5 8.5 dB PIC-CTL soft response characteristics 1 GPS1 Input: 50% video + sine wave f = 1 MHz, 158 mVp-p –4.5 –3.5 –2.5 dB PIC-CTL soft response characteristics 2 GPS2 Input: 50% video + sine wave f = 2 MHz, 158 mVp-p –9.0 –7.0 –5.0 dB Pseudo-V insertion level (playback) ∆VDP With 5 V applied to T19A –150 –50 +50 mV Pseudo-H insertion level (playback) ∆HDP With 2.7 V applied to T19A –300 –200 –100 mV Continued from preceding page. No. 5473-3/8 LA7437, 7437A Continued on next page. Parameter Symbol Conditions min typ max Unit mV [Record Mode Y System] White insertion level (playback) ∆WHP With 1.3 V applied to T14A 150 300 450 Sync separator output level VSYP The SYNC-OUT output pulse wave height 3.9 4.2 4.5 V The SYNC-OUT output pulse width 4.2 4.5 4.8 µs Sync separator output pulse width PWSYP Sync separator output pre-record delay time ∆TSYP 1.4 1.6 1.8 µs 4.2 V regulator voltage VREG 4.0 4.2 4.4 V 190 230 mVp-p 500 700 mVp-p +0.2 +0.6 [Record Mode Chrominance System] Chrominance low band conversion output burst level VOR-38 Input: PAL/GBI standard color bar signal, 1 Vp-p 150 VXO oscillator level 1 VVXO-R1 Input: PAL/GBI standard color bar signal, 1 Vp-p 300 Record ACC characteristics 1 ACC-R1 With only the chrominance signal level increased 6 dB Record ACC characteristics 2 ACC-R2 With only the chrominance signal level decreased 6 dB –0.5 –0.1 ACC killer on input level VACCK-ON –26 ACC killer on output level VO-ACCK –60 VACCK-OFF –20 ACC killer recovery input level VXO control sensitivity SVXO 3.8 APC pull-in range 1 ∆fAPC1 350 APC pull-in range 2 ∆fAPC2 BGP delay time tD BGP pulse width 5.7 dB –50 dB 7.6 Hz/m dB Hz –350 Input: PAL/GBI standard color bar signal, 1 Vp-p dB dB Hz 3.1 3.4 3.7 µs tW 4.7 4.9 5.1 µs AFC pull-in range 1 ∆fAFC1 +1.0 +7.0 AFC pull-in range 2 ∆fAFC2 –3.7 –1.0 kHz kHz [Playback Mode Chrominance System] Video output burst level VOP-11 SP mode, input: burst 30 mVp-p 255 300 345 mVp-p Pin 25 output burst level VOP-25 SP mode, input: burst 30 mVp-p 195 230 265 mVp-p Playback ACC characteristics 1 ACC-P1 With the chrominance level increased 6 dB +0.5 +0.8 Playback ACC characteristics 2 ACC-P2 With the chrominance level decreased 6 dB Playback killer on input level VACK-P Playback killer on chrominance output level –0.5 –40 –32 –25 dB –44 –40 dB dB VOACK-P Main converter carrier leakage CLP The 5.06 MHz carrier leakage component Burst de-emphasis level NT GBD NTSC mode Playback XO output level 1 VXO-P1 –40 –33 –5.0 –4.75 300 450 600 mVp-p –9 0 +9 Hz ∆fXO SLD detector current 1 ISLD1 135 SLD detector current 2 ISLD2 135 NTSC playback burst output level VBNT NTSC mode dB –5.25 Playback XO oscillator frequency deviation ∆fXO = f – 4.43361875 (MHz) dB –0.8 dB µA µA 255 300 345 mVp-p NTSC to PAL conversion V axis burst level VB-NAP –1.0 0.0 +1.0 dB NTSC to PAL conversion burst level ratio ∆B-NAP –2.0 0.0 +2.0 dB Continued from preceding page. No. 5473-4/8 LA7437, 7437A LA7437A Control Pin Table Pin No. Control function L 9 R/P Edit 40 R/P YNR (AVNS)-CTL R 11 P M H 3.8 VDC or more 1.0 VDC to less YNR-off 1.5 to 2.5 VDC YNR-CTL N, C, CTL 1.5 VDC or less N, C-off 2.0 to 3.0 VDC N, C-CTL C-rotary 0 to 1.9 VDC Low CH QV/QH CHARA. INS 0.8 VDC or less Through EP/LP/SP 1.2 VDC or less SP 3.5 VDC or more YNR (strong) 3.9 VDC or more ****** 2.3 VDC or more High CH 17 R/P 19 P 25 R/P 28 R SP carrier shift stop 27 P NAP 1.2 VDC or less Through 2.0 to 2.7 VDC Balanced-mod output 3.3 VDC or more NAP-on 30 R/P NT/MESEC/PAL 1.2 VDC or less PAL 2.0 to 2.7 VDC MESEC 3.9 VDC or more NTSC 1.2 to 2.2 VDC CHARA insert 2.6 to 3.3 VDC Pedestal insert 2.0 to 2.7 VDC LP 3.7 VDC or more QV insert 3.9 VDC or more EP 3.0 VDC or more SP carrier shift stop 33 P Trick 3.9 VDC or more 2 P DOC-off 4.1 VDC or more 6 R/P PB-H Note: Do not allow pin 3 to fall under 1.5 V. (The chip will enter test mode.) 4.0 VDC or more Function Control in each of the LA7437A Operating Modes Edit YNR Detail enhancer NC Pin 40 control Pin 11 control Pin 11 control L M H L On Off Off Off Off Off Off Off Off On Off Off Off M H PIC-CTL 1/2 fH carrier shift L M H Variable Center — — — — ● (✕) Off Variable Center — — — — ● (✕) K1 = 0.2 K1 = 0.2 K2 = 0.0 K2 = 0.0 Off Variable Center — — — — ● K1 = 0.5 K1 = 0.5 K2 = 0.0 K2 = 0.0 Off Variable Center — — — — ● On K1 = 0.0 K1 = 0.0 K1 = 0.5 K2 = 0.0 K2 = 0.0 K2 = 0.0 — — — Off Variable Center Center — Off K1 = 0.0 K1 = 0.2 K1 = 0.5 K2 = 0.0 K2 = 0.0 K2 = 0.0 — — — Off Variable Center ● — On K1 = 0.0 K1 = 0.2 K1 = 0.5 K2 = 0.5 K2 = 0.5 K2 = 0.5 — — — Off Variable Center Center — — Off Variable Center ● — SP REC LP EP SP PB LP EP 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. Off No. 5473-5/8 LA7437, 7437A LA7437 Test Circuit No. 5473-6/8 LA7437, 7437A LA7437 Block Diagram No. 5473-7/8 LA7437, 7437A ■ 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. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ 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: ➁ 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. ■ 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