AN7465K | DigiCamel IC Datasheet

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AN7465K-S PANASONIC | Alldatasheet

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FM Noise Canceller/Stereo Multiplex Demodulator for Car Radio AN7465K Unit : mm @ Description Te Be (EE on q b i 32 The AN7465K/S are the monolithic integrated circuits for q 5 roe hd car stereo configured FM noise canceller and PLL multiplex | q P r= 't demodulator in a single chip. «| a B =r 3} iS) — a Bp | =z | Pe Eo “| q B = @ Features q P Ex Met _JS 1s | eta @ HPF/LPF of noise canceller input section built-in a) LT 55 @ Good S/N and distortion due to use of quasi sine wave LJ as pilot canceller negative wave ——, 48533 @ HPF band auto switching by monaural and stereo \\ @ With ASC/ATC functions reducing noise at weak electric / gare field smoothly rrr @ = With forced monaural and VCO stop 28-Lead DIL Plastic Package (28-DIP) AN7465S Unit : mm os baz a2 93 - ™@ Block Diagram 28-Lead PANAFLAT Plastic Package (SO-28D) Voc GND Pilot Phase Pilot VrEG. [1 Canceller ] [l Detection r | Detection [ue JE 2 = LPF Frequency; é Gate Lam Lr Pulse Pulse fi Separation Stereo Amp. as ew vee M™™ 69328652 0014052 691 a Panasonic 433

@ Absolute Maximum Ratings (Ta=25°C) Item | Symbol Rating Unit Supply Voltage Voc 10 vo Supply Current (Without Lamp) Tocay 25 | mA Supply Current (With lamp) Iccay 30 mA Power Dissipation a | 280 mW Operating Ambient Temperature -30~ #75 c Storage Temperature -55 ~ +125 | °C Operating Supply Voltage Range: Vc = 6.0V ~ 10.0V @ Electrical Characteristics (Ta=25°C) Item [Symbol| Condition Condition min. | typ. | max. | Unit Total Circuit Current Tor | Vin= OmV 10 | 15 | 20 | mA AGC Voltage (1) Vin = OmV, Rs = 10kQ | | 005 | 04 v AGC Voltage (2) Vin = 2mV, f = 150kHz 1 13 | 15 Vv Noise Detection Voltage Vin = 100mV, f = 150kKHz 03 Vv Gate Pulse Width | PW | Vin=0.3Vpp Pulse, tw=Ins,f=IkHz) 20 25 | 30 | ps Residual Noise Voltage Vin = 1Vp.p Pulse, tw = 10ps, f = 1kHz 03 107) mv Output Voltage Vin = 300mV, f = 1kHz 250 | 290 | 330 | mv Channel Balance Vin = 300mV, f = 1kHz o | 1 | @B Separation (1) (R9 = 8200 fixed) | Sepr_| Vasny=270mV, Vp = 30mv, f= IkHz 32 or) Separation (2) (at R9 adjustment) | se | AtVaan) 5. Ne? = 30mV, 8 4B Total Harmonic Distortion (Stereo) | THD | Vasa =270mv, Vp =30mV, f= 1kHz 005 | 03 % Total Harmonic Distortion (Mono) | THD | Vis=300mY, f= IkHz [|_| 005 | 03 % Residual Pilot Voltage V,=30mV [| 25 | 10 | mv Lamp ON Pilot Voltage Input only Pilot Signal uo} 16 | 2 mV Lamp OFF Pilot Voltage Input only Pilot Signal mV ‘VCO Stop Voltage Pin 14, VCO Stop Voltage 3 | 34 | 38 v Maximum Input Voltage f= IkHz, Input at lamp ON jor | | | ov pti a er Out imped Pai Ps |e * Input through LPF of R = 1500, C = 0.033nF Eee Panasonic MH 6932852 0014053 728 434

——— @ Application Circuit 19kHz Vee Monitor Polystyrol 0.22)" IN from &| Capacitor | Sy2q [4 Tk FM Det ° om $s 390p | esa @ 02m uu Tk 4 Slo. y) 0. cy Ze | “T ‘ * Hs oll i a a a 248; a stig Forced 15k3 al aT [gl am” oon 2k 3] il © Monaural a Re sv a 6 6 Veont IN © Pare LOut R Out Level Meter Voltage Input Note: Rarc and Rasc must be determined by size of level meter. When user use half-fixed VR; use 100kQ ™@ Pin Descriptions Pin N Pin N: Pin Waveform, Voltage un Equivalent Circuit ‘in No. ‘in Name in ‘avelol |, Voltag Imp ce iq! ; mneaneirr 2 o) g @ Voc 25Vv ; rcduge tsi | Kase a J 3 | Noise Amp. AGC A : : HO mene OV Noise level At discharge .. High ® 32 = 25V max 2Voc REET | coarse | BSP 4 |G j. aye ois ate Time Adj ov Low at operation ® 120 <4 0 Normal 5 | NC.Hold Kee etsy 15k 2) Q [isk Q © [jk Dc 12V AP aly 12V % © <j Zz Viac) = Vin- V; 7 | MPX.IN u_ 33k ISA @ aoa M@@ 6932452 OO14054 bb4 mm Panasonic 435

@ Pin Descriptions (Continue) Vee: vco soe LAV 21 | RCC Time NINN 1.2kQ Constant lV 12k i @ @ ° masa | ecw | sumo | — a 19kHz Vec = 100MVp.p 26 | NC.IN Pad os sok Signal Input = Vin 25V o4p 24p Low level down , j ” ° ok external voltage (2.5V) 25v Vee 28 VReF 2.5V constant voltage Low VREF L p o @ Characteristics Curve

50 Sep - Vcc 50 Sep - Ta 19s VCO - Voc

TT A TT TT [TT TT TTT) s seston FH oh Sens | wT [Mioratninae [TT - Ho Se} LL ey | gs LTT TT gia || | 8 0/4 ‘aan e CETTE g Hd es lt7TT titty {EET TT | A =f Iii} & ott EU T g | $ LITT TT) &€ ETT 10] Ete 10) Roca I} 2 LETT TT oL ver 20 [| oLYen son LT} °.,s-LE ETT IT | 4 6 8 10 12 40 0 40 80 120 4 6 §8 10 2 Supply Voltage Voc (V) Ambient Temperature Ta (“C) Supply Voltage Voc (V) M™ 6932852 OOL405b 437 Panasonic 437

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@ Characteristics Curve (Continue) Forged Monaural ON Level - Vcc Forced Monaural ON Level - Ta NC Gate Pulse Width - Voc Vec=8V, fa=IkHz ] | Veo=8¥, fie=1kHz [7] I> 4] V-30mv 4] ¥_=30mV ; 7) tA “Taput | | | veo stor| = a3 a3 30 et{{[TtTiTtiy e€ Hy ae z TTT ity 3 ——— SEReEEe Pt if 3 Po | | | trons onaart (LORE | & ol aan Baan een | an otLlti tt | oli tt [| ott i tl | 4. 6 8 0 12 40.0 40 80 120 4. 6 §& 1 12 Supply Voltage Vcc (V) Ambient Temperature Ta (“C) Supply Voltage Vcc (V) NC Gate Pulse Width - Ta - Trot - Ta 5 Vrer - Ta ae} Vig=0mV Vec=8V, fu=tkHz | | |

4 KA Tnput 20) — Vox8v & 4] Vo=30mv

g {{ |i me! 2 vero] [TT § eee set toOOT) §uehlo 2. ett | ¢ ae | eLitt yy $0 Faaenaae Eo tt 5 +. |

2 L + = RP 2 EH

é Ll 4b zs SERRE giLtt itt tt Pett HHH | Lt ttt yl o Litt IT | ott | itl | ott ttt | 40.0 40 80 120 40.0 40 80 120 40.0 40° 80 120 Ambient Temperature Ta ("C) Ambient Temperature Ta (°C) Ambient Temperature Ta (°C) Vout - fin 50 ASC Characteristics ° ATC Characteristics AMOUNT HH tL H Yost

2 S| a ~ “7 a ia g yi ene

5-10 Ta G20 in + S sth __ & 8 Po CL} 8 CECE SN ee ee ae

2 CNA 6 Fees Ge

3 MP a, Oe on ee

B _ Wece8¥, fg=tkttz Tl 10 A Voc=BV, fy=UkHz 6 asf sofia oe) ee Stereo L+R=270mV a A ; | Stereo L#R=270mV D amv | ol LAY versoni aol LITT TTT I

100 Tk 10k 100k o 1 #2 3 4 o a 2 3 4

Input Frequency fin (kHz) Vasc (V1) (V) Ambient Temperature Ta (“C) a @™ £932852 0014058 20T a Panasonic 439

@ Characteristics Curve (Continue)

10 THD - Vin

SRS ESSE] £ Fe

20 See

§ os LT TT Ze ee Fi ee See ll Foor [ UIIIN I 10 100 1000 Input Voltage Vin (mV) @ Supplementary Explanation @ Selection Standard of Noise Canceller Resistance Value . —— Gatesw Buff. i Buff. | H.PF. AGC Amp. Pulse [] Input oH} ie teste Ss [Det.} [Schmit Gate i Rectifier, Time Hold PNL i L AGC Volt 1.5k ty Rupr 0.047p: & x 3.3k S) 0.047, ju SE E> 3 0.01 I hh Fig. 1 Pulse Noise Eliminator (PNL) Block Diagram (1) Relation to field strength 1. In weak electric field where noise is apt to increase, the AGC effectively controls the PNL operation. (a) Incase operation error is frequently caused by white noise Suitably increase the value of Pin 3 Racc. (220kQ.~ 1MQ) (b) Incase operation error is frequently caused by overmodulation Suitably increase the value of Rupr between Pin 27 and Pin 28. (47kQ ~ 470kQ) 2. In medium to strong electric field relatively free from noise generation, the AGC becomes less effective and noise is detected almost at the maximum sensitivity. (a) Incase the detection sensitivity is too high Suitably decrease the value of Rupr between Pin 27 and Pin 28. (10kQ. ~ 47kQ) 3. In every electric field (a) Incase the detection sensitivity is excellent but the PNL effect deteriorated due to holding level fluctuation by noise, suitably increase the resistance value of the resistor connected in series with the Pin 5 holding capacitor. (1kQ ~ 3.3kQ), (b). In case noise of the gate pulse itself is conspicuous, suitably narrow the gate pulse width by decreasing the resistance value of the Pin 4 resistor. (3kQ ~ 6.8kQ) Panasonic mm =6932452 0014059 146 440

@ Supplementary Explanation (Continue) (2) Selection of AGC Resistor Racc Pin 3 Voc Au Zo = 15k|] Vase 3k lo ~~ 1.4k[] Race Op J ! 10k[ | Fig. 2 Pin 3 is the AGC LPF, and enables AGC effective level adjustment. The equivalent circuit in the vicinity of this pin has been so constituted as shown in Fig. 2, and the output impedance at the charging time is 15kQ while the input impedance at the discharging time is about 1MQ. The standard value of Racc is 220Q, but in case operation error is frequently caused in weak electric field by white noise, selectively increase the value of Racc to a suitable level between 200kQ and 1MQ. So long as the value of Racc was properly increased, the AGC voltage proportionally becomes higher to prolong the discharging time constant, and the rate of operation error sharply drops with decrease of the gain of the AGC Amp. (Through Pin 3, the noise components are put to peak (envelope) detection. Even if the value of Racc was increased, the charging time and voltage remain almost unchanged because Zo = 15kQ.) (3) Selection of HPF Resistor Rupr Pin 27 Gy Increase of “7 Rupr We Freq. 10kHz 100kHz 4 When the resistance value Rupr of the resistor between Pin 27 and Pin 28 was increased, the cut-off frequency of the HPF proportionally becomes lower. The standard value of Rupr is 47kQ, but in case operation error is frequently caused in a weak electric field by white noise at the modulation time or non-modulation time, selectively increase this Rupr to a suitable value not exceeding 470kQ. M@™ 6932852 OOL4OL0 9b8 a Panasonic 441

Product Information

AN7465K specifications and overview.

Summary

FM NOISE CANCELLER/STEREO MULTIPLEX DEMODULATOR FOR CAR RADIO

Description

FM NOISE CANCELLER/STEREO MULTIPLEX DEMODULATOR FOR CAR RADIO

Source title AN7465K Datasheet(PDF) - Panasonic Semiconductor

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