AN5707NS

AN5707NS PANASONIC

Document overview

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Technical content

——$5 TV Electronic Tuner-Control IC ll Overview Unit: mm The AN5707NS is an integrated circuit for tuner-control a circuit of auto-search-tuning system. é cy] 28 = lad foo | (Ch . ci @ Features a. ig [nos imi + Low supply-voltage operation (Voc=4.2 to 5.5V) 3) say poze | *« Low power consumption by Bi-CMOS Process (30mW sal Ee |i 3 typ.) ; ak ss] ro 21 a Fd « Auto search by Up-Down Switch oh oge hn20 mB + Bar display on the screen (tuning channel) ial Eos | fois (SS i = 9.4 +0,3- a 28-Pin PANAFLATR Package (SOP028-P-0375A) @ Block Diagram Vee _— — © Pulse Widkh ‘Tuning Cont. Ti oO 1 a & 6] co © | a: Rewurn BT Voltage ICharge- Position eD) Generating Discharge ‘Adjustment | Power On Circuit Circuit (22) = = Daa ad @) G19) (9) _8)-) GND MH 6932852 0014395 92T MT Panasonic 312

Hi Absolute Maximum Ratings (Ta=25°C) Sopp age 2 Pin voltage es | v Supply current a a 0 oncom a eT Ly Power dissipation a Operating ambient temperature i Storage temperature a c ll Recommended Operating Range (Ta=25°C) Parameter Range Operating supply voltage range 4.2V 0 5.5V ICs for @ Electrical Characteristics (Ta=25C) ene Pin volage [Wer Wess as a Coal tring caret (3) Tew | Voni25% ing Vining pwn | =14 [== aa Coapingcaping core (6) | low | V2 ding UHF wear down | a8 | ——| Ts [ oa Corps cen (8) lw | Vanr2V, ig npn (= T| | a Tn BY amp. characteristies VFL (2) | Vas—u02) [Vur=35sv dT | 425 | 46 | v BT amp. characteristics (2) UHF | Vas—1a) a V BT amp. inclination (2) UHF | AVz5—i1a Vv Panasonic 313

@ Electrical Characteristics (cont.) (Ta=25'C) Bardsley ouputpulse wah (VHD) ewan | VeomsV | tT ta] Ts Berdipy capi with UH) [ sue | Vee=sV SSS | tt es Bp opt we WRI] Voy | Vee=sV Sd | | — | iw piyeapiepain UH [Vow [Voe=sv | et] 3 | — | Yo Auto return upper limit threshold voltage v i Application Circuit BS AE OY sound Deter i st Bove! Vg Vee : ve cal fete mae £ Sion ae eT tox: guy BFF 0.1 uF 53s i, Pr yee ar 4709 5 oA Fite =] % = HP am In hed = % JL mer | _ oft BG fxs | ¥ out pes we | ae 4 [mom [TR ee mmog 2 0334F — Vee sk | CT | eee Coes zi Bown BT Voltage Charge Position an me Generating ra Adjustment eS wer Circuit ‘reall T ot 3} a = SOK S oun ahs Veo 50KB 2°50KB 0088 Panasonic 314

. vo , Pin No. Typ. waveform Description impedance Equivalent circuit io |—| oe | av _ . 3 Outputs a pulse of positive polarity Bar display 3 , 2 134s | for bar display at the time of VHF | 5000 I output (VHF) reception. i y* Outputs a pulse of positive polarity 3, | Bardisplay 1sus | for bar display at the time of UHF re- | 590 I output (UHF) ception. Determines the presence/absence of - . a TV signal by the DC voltage of | High a 4 | Signal detection | 7—~/——~ | this pin, Connect the CR filter exter. | impedance pe ® nally. Filter pin for HP. pulse-waveform 5 we shaping circuit. The output pulse | High T ® _ mono/multi S L/ L wea changed by the CR of time | impedance Ics fore TY 6. | Flyback pulse Input a horizontal flyback pulse (positive input polarity) to detect a signal. 56k. sek . Input a horizontal synchronous sep- 7 | Plorizontal signal aration signal (positive polarity) to | 68k axa input detect a signal. amv \\_ Filter the AFC signal for input, 8 AFC input 3AV ~~. 4--- which is significant for search tun- <iMa Search-up is started when this pin is 9 | Search-up/-down set to Vcc and search-down is start- | 100k OF ay input ed when itis set to GND. bid Lehhhch Lel/Hch switching point setting pin. @ sua 10 | switching voltage Lch/Hch of VHF is automatically | 100k oO) input switched. Supply current is 6mA and the operat- 11 | Supply voltage ing supply voltage range is 4.2 t0 5.5V. —— Vec should be regulated before use, ‘The search speed is varied with Search speed , 0 ° samt | — [Eeertcera) on | L- pin. —— i SO6932852 0004998 £39 315

ll Pin Descriptions (cont.) . vo . Pino Typ. waveform Description impedance | Pauivalent circuit Pin for generating MANU vol- Charging capacitor tage in auto search, Insert the ca- | High 13 P connection pacitor of about 47F with great | impedance care of leak. BT voltage Pin for generating BT voltage @ in ory 14 | generation manual search, Should be opened in | >1k0 (Manual) auto search, Torap Vee | insert the capacitor of about 4.7 .F ‘Temporary stop between this pin and GND in order Pe) 15 100k e”® capacitor connection| to stop temporarily at the tuned 5 Used for switching of audio defeat, and 16 | Defeat output of time constant of AFC filter, etc. Pa Search ! H, Tuning ! OPEN A channel display bar appears when 17 | Channel call this pin is set to GND and does not | 10k Le appear when itis set to Voc. Pin for darkening the screen when a channel display bar appears, and ® 18 | Bright output this pin is connected to the bright- 5® ness volume. Search : OV, Tuning : OPEN - Pin for adjusting the position ofa channel-dis- F 9 ae play-bar at the tine of VHF reception The | © rope 8 stua eijustment (1) position of a channel-display-bar is varied ® a With the DC voltage tobe given to this pin. , Pin for adjusting the position ofa channel-dis- 3 Bar display g di play-bar atthe time of VHF Lch reception B stun

20 Pojostment (2) The poston ofa channe-display-baris varied | < 100K @

with the DC voltage to be given to this pin, ; Pin for adjusting the postion ofa channe-dis- 21 pechcntad play-bar at the dime of VHF Hch reception. |< 1994 9 stun Pojustment (3) ‘The position of a channe-tisplay-bar is varied withthe DC voltage tobe given to this pin. ‘ To generate a sawtooth wave for determining the position of a chan- 22 | Filter Nn, nel-display-bar. Insert the capacitor | of about S60pF between this pin and GND. ™ Pin for determining the amplitude, on the i panel, ofa channel-display-bar atthe time of 3” nied ‘VHF reception (tbe poston ofa display bar adjustment (4) ‘on the panel when the highest channel is 3 received). The amplitude is varied with the quantity of creat flowing ot of this pn, lb 6932852 0004999 575 Panasonic 316

-.. Wi Pin Descriptions (cont.) Pin No Typ. waveform ime, Equivalent circuit . . impedance > Pi i erg fe av on de pod of cares 7

2 Bar display pyrene of VFA pol ily

ajustment (5) bar nthe pe when the ibs came i red), The angi 3 tue sve wih he quay foe owing ot of is in. @

7 Pi i dng Ge apo on te panel of heh

25 Bar display layer te ine of VF Leh spt hepsi of dighay

ejustment © barney whe te ihe ches eed). The ap z a ‘cei aed wh quanto cert wing otis pin Pin for outputting BT-voltage for BT voltage ; ss @ 26 tuner. Compensation of tuner-char- | 12k ‘generation | — | acteristics is applied. ma UHF/VHF switching pin. Br 27 | UNV switching Voor VHF 24k Orch GND or OPEN*"UHF Tuner BS output pin, which is opened-collector output. = Used at 10V or less. ICs for | BS re a= | nt Fraga] | = OPEN i Supplementary Explanation + Design Reference Value of Electrical Characteristics (Ta=25C) AFC shld votage @) [Vue @)_[Vee=s¥_ a Pv AFC teshld votege G) [Vue @)_[Vee=sv Ye 9 Search-down threshold voltage [Vw (DB) [Ve=sv | tT tS | — | Note) ‘The value in the above characteristics is not a guaranteed value, but reference one on design, + Characteristic Curve Vis Vag Characteristics (VHF) Vis Vos Characteristics (UHF) s 8 HT | HTT fe] TTT ‘ i LTT Te TT AUURRRRRREE

2 LTT [meee re = TTT |

TET . [|| LTT SUTDERIEVARRE sURRRE AGREE LZ 1 1 WV HRRRD/GR0REE LUV . / a rr Vues (V) Nu-1 (V) ——. $$ Panaeanic M@™® £932852 OOL4400 O17 317