AN6291

AN6291 PANASONIC | Alldatasheet

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ICs for Cassette, Cassette Deck n Overview The AN6291 and the AN6291S are the single chip ICs suitably developed for noise reduction of dbxIItype and used for stereo operation. They can be used for U.S. sound multiplex TV. 1.8V low voltage operation enables to apply for battery-operated equipment to the Hi-Fi deck. Package is available for 22-pin DIL plastic and 22-pin SOP package. Equipment can be minitualized and high integration. n Features

• Wide dynamic range : 110dB
• Low operating voltage : VCC (min.) =1.8V
• Fewer external components
• Adjustment : only one
• Low power consumption
• Wide operating supply voltage range : VCC (opr) =1.8V to 14V AN6291, AN6291S Dual dbx II Noise Reduction System ICs 3 ~15˚ 10.16–0.25 0.35 + 0.1 – 0.05 4.7–0.25 2.54 1.2–0.25 0.5–0.1 8.6–0.3 26.7–0.3 3.3–0.25 1.0–0.25 AN6291 22-Lead DIP Package (DIP022-P-0400A) Unit : mm 1.090.4–0.25 1.27 0.1–0.1 0.3 2.0–0.2 0.925 0.15 15.3–0.3 7.2–0.3 9.4–0.3 AN6291S 22-Lead SOP Package (SOP022-P-0375) Unit : mm

ICs for Cassette, Cassette DeckAN6291, AN6291S V C C C urrent Source 21 20 19 18 17 16 15 14 13 12 2 3 4 5 6 7 8 9 10 11 N C R M S IN –B TIM IN G C C A IN –B C A P 1–B C A P 2–B V O U T– B O N – O FF –B I TIM E EN C O D E D EC O D EC A P 2– A N .I.O N – O FF V O U T– AA D J G N D R M S IN – A TIM IN G – A C C A IN – A C A P 1– A R M S C C A R M S C C A Tim ing C urrent O P A m p. O P A m p. Logic B ias G N D SU B V C C n Block Diagram n Pin D escriptions Pin N o. Pin N am e A djustm ent of tim ing current G N D R M S IN -A TIM IN G -A C C A IN -A C A P-1-A C A P-2-A V O U T-A O N -O FF-A N .I. D ECO D E Pin N o. Pin N am e EN CO D E I TIM E O N -O FF-B V O U T-B C A P-2-B C A P-1-B C C A IN -B TIM IN G -B R M S IN -B N C V C C

ICs for Cassette, Cassette Deck AN6291, AN6291S V C C IC C PD Topr Tstg Tstg Supply V oltage Supply C urrent Pow er D issipation (Ta=75˚C ) O perating A m bient Tem perature Storage Tem perature V m A m W Param eter Sym bol R ating U nit 14.4 100 –20 ~ + 75 –55 ~ + 125 –40 ~ + 125 A N 6291 A N 6291S n Absolute M axim um R atings (Ta=25˚C ) Param eter Sym bol C ondition m in. typ. m ax. U nit Input/O utput C haracteristics/EN C O D E M ode Input/O utput C haracteristics/D EC O D E M ode Total H arm onic D istortion/D EC O D E M ode C rosstalk/EN C O D E M ode R ipple R ejection R atio/D EC O D E M ode Q uiescent C urrent Input/O utput C haracteristics/dbx O FF M ode Total H arm onic D istortion/dbx O FF M ode O utput N oise V oltage/dbx O FF M ode EN C O D E M ode D EC O D E M ode EN C O D E M ode D EC O D E M ode EN C O D E M ode D EC O D E M ode V O E –1 V O E –2 V O E –3 V O D –1 V O D –2 V O D –3 V O M E V O M D TH D D V N O E V N O D C D E C D D C T SV R R IC C V O FF TH D O FF V nO FF V IN = + 20dB , f=1kH z V IN = 0dB , f=1kH z V IN = –40dB , f=1kH z V IN = + 10dB , f=1kH z V IN =0dB , f=1kH z V IN = –20dB , f=1kH z TH D =1% , f=1kH z V O = + 14dB , f=1kH z Input Short A -w eight V IN = 0dB , f=1kH z M easuring channel : Short A nother channel : O utput 200m V , f=1kH z f=60H z, V =100m V , Input Short V C C =3V , Input Short V IN = + 20dB , f=1kH z V IN = + 20dB , f=1kH z Input Short, A -w eight 7.5 –23 –44 200 –1.2 –1.2 –20 –40 150 450 0.15 100 1.8 0.3 12.5 + 2 –17 + 2 –36 0.3 200 1.2 1.2 3.2 dB dB m V µV dB dB dB m A dB µV N ote) 0dB = 20m V = –34dB V M axim um O utput V oltage N oise O utput V oltage D ifference B etw een C hannels n Electrical C haracteristics (V C C =3V , Ta=25˚C )

ICs for Cassette, Cassette DeckAN6291, AN6291S Frequency f (H z) O utput N oise V oltage V no, O utput V oltage V O U T (dB ) –140 V O U T V C C = 3V V in= – 34dB V 100 1k 10k 20k –120 –100 –80 –60 –40 –20 +20 VO U T, Vno– f (Encoder m ode) V no O utput N oise V oltage V no, O utput V oltage V O U T (dB ) –140 V C C = 3V V in= –34dB V 100 1k 10k 20k –120 –100 –80 –60 –40 –20 +20 VO U T, Vno– f (D ecoder m ode) Frequency f (H z) Total H arm onic D istortion TH D (% ) V C C = 3V V in= – 34dB V 100 1k 10k 20k TH D – f (Encoder m ode) Frequency f (H z) 0.5 1.0 1.5 2.0 Total H arm onic D istortion TH D (% ) V C C = 3V V in= – 34dB V 100 1k 10k 20k TH D – f (D ecoder m ode) Frequency f (H z) 0.5 1.0 1.5 2.0 –100 O utput V oltage V O U T (dB V ) –70 V C C = 3V f= 1kH z VO U T, TH D –VIN (Encoder m ode) Input V oltage V IN (dB V ) –80 –60 –40 –20 0 +20 –60 –50 –40 –30 –20 –10 V OUT TH D 0.5 1.0 1.5 2.0 Total H arm onic D istortion TH D (% ) –70 O utput V oltage V O U T (dB V ) V C C = 3V f= 1kH z VO U T, TH D –VIN (D ecoder m ode) Input V oltage V IN (dB V ) –100 –80 –60 –40 –20 – 0 0.5 1.0 1.5 2.0 Total H arm onic D istortion TH D (% ) V O U T V no TH D V OUT

ICs for Cassette, Cassette Deck AN6291, AN6291S 22 21 20 19 18 17 16 15 14 13 12 1 2 3 4 5 6 7 8 9 10 11 – + – + – + – + O FF O N O utput – B +V C C SW 2a 0.01µF 560Ω10µF SW 1e 1kΩ ED15kΩ 6800pF 51kΩ 330Ω 2700pF ED SW 1b 6800pF 15kΩ 15kΩ 22µF10µF 0.47µF 0.033µF 1kΩ 10kΩ 2SC 1327 6.8kΩ33kΩ4.7kΩ 150kΩ 0.1µF 270k 0.0033µF 0.0033µF 330pF 33kΩ 3.3kΩ 0.1µF ED SW 1a 0.1µF Input – B SU B C urrent Source R M S– B R M S – A C C A – B C C A – A O P A m p.– B O P A m p.– A Logic 1µF15kΩ 6800pF51kΩ22µF 560Ω 10µF 330Ω 0.01µF O utput –AO N O FF SW 2b 51kΩ 15kΩ 6800pF 10µF ED SW 1e 0.1µF 3.3kΩ 0.47µF 0.033µF 1kΩ10kΩ (B ) 2SC 1327 6.8kΩ33kΩ 150kΩ 1µF270kΩ 0.0033µF 0.0033µF 330pF 33kΩ 0.1µF SW 1d E D Input Logical condition of recording/playback Pin11 V C C O pen V C C Pin12 O pen V C C V C C M ode D EC O D E EN C O D E O FF

1 Sw itching circuit of recording/playback

4.7kΩ 10µF 2700 pF * 1 Signals of 1kH z, 20m V are applied to the input of both channels at the sam e tim e, sinking current into the Pin13 should be adjusted to 15µA –5% . Standard value at V C C =3V is about 1kΩ . * 2 External circuit should not be connected w ith Pin21. C onnected in the IC . * 3 U sers should follow the latest technical inform ation from dbx com pany. C onstant num ber m ight be changed. N ote 1) A ll the resistors and the capacitor w ith the m ark should be used in the error less than –5% . N ote 2) S1a~ S1e : Sw itch record, playback (A bove figure show s “PLA Y B A C K ” m ode). N ote 3) S2a~ S2b : dbx O N -O FF sw itch (A bove figure show s “O N ” m ode).

ICs for Cassette, Cassette DeckAN6291, AN6291S Input Input 22 21 20 19 18 17 16 15 14 13 12 1 2 3 4 5 6 7 8 9 10 11 + – – + – + – + – + –+ 0.47µF 10kΩ 1kΩ0.033µF * 2 N C 10µF 0.33µF 16kΩ 16kΩ 68µF 150Ω 4700pF 10µF 560Ω 1kΩ 4.7kΩ 0.022µF 10µF dbx O N – O FF O pen “O N ”( ) O utput +V C C O utput LogicC urrent Source R M S– B R M S–A C C A – B C C A –A O P A m p.– B Sub 2kΩ (B ) 10µF 16kΩ 0.33µF 68µF 150Ω 4700pF 16kΩ 10µF 560Ω 0.01µF 1µF 0.022µF 4.7kΩ 1kΩ 10kΩ 0.033µF 0.47µF

2 Playback exclusive circuit (D esigned noise at dbx O FF m ode to be sm all)

0.01 µF O P A m p.– A * 1 Signals of 1kH z, 20m V are applied to the input of the both channels, adjust sinking current into the Pin13 to 15µA –5% Standard value at V C C =3V is about 1kΩ . * 2 External circuit should not be connected w ith the Pin21. C onnected in the IC . * 3 U sers should follow the latest technical inform ation from dbx com pany. C onstant num ber m ight be changed. N ote 1) A ll the resistors and the capacitor w ith the m ark should be used in the error less than –5% . N ote 2) Im pedance of the input signal source should be less than 100Ω .

ICs for Cassette, Cassette Deck AN6291, AN6291S Fortissim o +10dB – 60dB +20dB 0dB – 80dB – 60dB +10dB M agnetron saturation level D istortes D C range N oiseN oise level R ecording Pianissim o Input Level 60 ~ 70dB 100dB Fortissim o (large sound) distortes due to m agnetron saturation E ven if input w idth is 100dB , w idth 60-70dB is playbacked in output. Pianissim o (sm all sound) is erased by the hysnoise of tape Fortissim o +10dB – 40dB +20dB 0dB D range N oise Pianissim o 100dB – 80dB D ecrease Increase C om pressed to 1/2 by dB Increase Fortissim o Pianissim oDecrease – 80dBNoise level Expanded to 2 tim es by dB +20dB Large sound is playbacked w ithout distortion Fortissim o is decreased less than saturation level and pianissim o is increased m ore than noise level. Thus they are recorded. D range is expanded in equal value as fortissim o is increased and pianissim o is decreased its level, and they are playbacked. 100dB of input range is playbacked as w ell Sm all sound is playbacked, too. n Effect of dbxII N oise R eduction System (W ithout noise reduction system ) (W hen dbx II System is O N ) M agnetron tape Playback O utput M agnetron tape R ecording (Encode) Input level Playback (D ecode) O utput N oise level is decreased m ore than by 30dB at the playback m ode (Im provem ent of S/N ratio) n C autions (1) W hen users use the A N 6291 and the A N 6291S, contract should be m ade betw een the dbx Technology Licensing. dbx licence and tradem ark should be contacted w ith the follow ing. the U .S.A . : dbx Technology Licensing JA PA N O ffice : dbx Technology Licensing

433 C alifornia Street, Third Floor

San Francisco, C alifornia 94104 Tel : 415-765-2801 Fax : 415-765-2141 (2) C apacitor betw een the Pin6 – 7 and Pin16 –17 is used to cut D C current. W hen leakage of D C current is large, encode and decode characteristics is not right value, capacitor's leakage should be as m inim um as possible. (3) The A N 6291 is a low pow er consum ption current type. So effection of w iring resistance is sm all and oscillation character-ist of pattern location is good, how ever, w hen im pedance of the input pin is high, w iring should be shorter because it is easily effected by external noises. Tel : 03-3378-0915 Fax : 03-3374-5191