AN7082K | DigiCamel IC Datasheet

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AN7082K PANASONIC | Alldatasheet

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PDF pages: 5

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Pre/Power Amplifier, Governor Single ANTOR2K Unit : Chip IC for 3V Headphone Stereo _ “e q is rr @ Description 3 3 = EX. ‘The AN7082K/S are the monolithic integrated circuits most 7 E ame suitable for stereo headphone cassette player with integrated a is eo —| pre-amp., power amp., motor governor into a single chip na a n — \\d built-in electronic VR. = i == an ilt-in electronic ~ thos @ Features ee @ Wide operating supply voltage range: Vec(opr) = 1.8V ~ 6V © © Fewer peripheral parts 762 @ Both channel VR control by single string VR is possible 22-Lead Shrunk DIL Plastic Package (22-SDIP) due to electronic VR built-in AN7082S Unit ; mm @ Available for graphic equalizer hee" TE | a oleae fT os 8 24-Lead PANAPLAT Plastic Package (SO-24D) @ Block Diagram AN7082K AN7082S O-O-O“9- OO) )-O- O-B-O-D-O-O-O--0-O--D fete ter) earresress aa =i | | ia res =I | | U A 0 I CT | eC ely (S a S| A beadedeseed 436545b0b65 Se Panasonic mm 6932852 0013725 242 Mm 106

———— SSSSSSSSSSSSSSSSSSSSSsSSSSSSSSSS @ Pin 2(2) Channel 1 Pre Amp. Input Motor Ref. Voltage (+) 33) Channel 1 Pre Negative Feedback 15. (14) Comparator Input 44) Channel 1 Pre Amp. Output | 16 | Motor Voc mM Channel 1 Power Amp. Output Ripple Filter 8(8) 20 (18) Channel 2 Volume Input 919) Power GND 21(19) Channel 2 Pre Amp. Output ray 24 @2) Pre GND Note: The pin numbers in the parenthesis are for AN7082K @ Application Circuit (AN7082K)

150 Ris Ra/l0

68k O.018n »: , a| a Sar wi mz 1000p [ FO ota | lu Ral + | AN7082K (s) 150 68k 0.018n + +| 4 ZZ 0474 ZZ 0.10 2m 100 tr ee Panasonic Mi 6932852 0013727 O15 mm 108

@ Application Circuit (Continue) (AN7082S) 150 68k 0.018. y. a ’ 2 m wae By t *] 1000p Ral + AN7082S () <> a WZ = re) 150 68k 0.018, 4 w 70K 22100, 0474 | Oln @ AN7082K Radio Application Circuit SWia | SWLb Radio Tape Radio Tape Radio In (2) fe) 9° RI6 J Rid: = |e +o, Rome HES az | 150 otk Zi ces o Lwin cu OOOO) 099) -© cis Bary 1 22s w= AN7082K (™)| # bid O-O- OOO-O-O-O-) ee TTT Ds my RG tl" | on al = w 2 cl ofl a & he abinn gy Ge hen gen eg 20 008 DI ai Sine Radio n(l) RIS Rit RIB: Note: Resistors R11/R12 and diodes D1/D2 are used to mute pre-amp during radio mode. Resistor R13/R14 act as multiplexer load. Resistors R15/R16 are used to achieve same output level during radio/playback mode. M@™ 6932652 0013728 15] Panasonic 109

@ Application Notes 1. Tuner Connection a) AN7082K can be combined with any tuner IC to form 2-chip Headphone stereo player. This is possible by adding 2 resistors, R11/R12 & 2 diodes, D1/D2 to function as Pre-amp Mute circuit during Radio operation. b) During Tape playback mode R11/R12 & D1/D2 are being DC biased through Tape Vcc, such that the Tape signal from Pre-amp output can pass through & be amplified by the subsequent power stage. c) During Radio Mode, Vcc supply to R11/R12 & D1/D2 is cut off, causing D1/D2 to be inoperative. As such, any Pre-amp output signals from tape will be blocked by the diodes and will not contribute to radio noise. d) Values of R11/R12 are selected to be equal to that of Tuner MPX load. Values of R13/R14 are adjusted to achieve same output power level during tape playback & radio modes. 2. Motor Hum Noise a) To reduce output noise, add C7/C8 1000p between Pre NF pins & Pre-Out pins on both channels respectively. b) Where practical, the distance between Motor and AN7082K on PCB should be kept as far as possible, especially the orientation of Pre-amp input pins. This is to reduce Motor Hum Noise feedback through to AN7082K/S inputs. Motor (-) ~~ peneceeee Pred 1 Distance kept as. (10) Ors far as possible (os Motor (+) 0d Leceuneene PreeIn 2 c) The PCB layout tracks from pin 10 and pin 13 to Motor(-) and Motor(+) terminals should also be maintained as far as possible from Pre-amp inputs pins to reduce motor interference. d) The motor assembly is preferably covered by some metal shield to reduce noise radiation of the unit. Panasonic M$ 6932452 0013729 993 110

Product Information

AN7082K specifications and overview.

Summary

PRE/POWER AMPLIFIER GOVERNOR SINGLE CHIP IC FOR 3V HEADPHONE STEREO

Description

The AN7082K/S are the monolithic integrated cirucits most suitable for stereo headphone cassette player with integrated pre-amp., power amp., motor governor into a single chip and built-in electronic VR.

Source title AN7082K Datasheet(PDF) - Panasonic Semiconductor

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