Video Switch for Dual SCART Connectors

Transcription

1 19-356; Rv ; 1/5 Gnral Dscription Th -channl vido switch is idal for antialiasing and DAC-smoothing vido applications or whrvr analog vido is rconstructd from a digital data stram such as cabl/satllit/trrstrial st-top boxs (STBs), DVD playrs, hard disk rcordrs (HDRs), and prsonal vido rcordrs (PVRs). Th filtrs and buffrs CVBS and RGB vido signals, making it idal for dual SCART (pritlvision) STBs with an auxiliary CVBS input. Th oprats from a singl +5V supply and has a flat passband out to 5MHz with a stopband attnuation of 3dB at 7MHz, making it idal for NTSC, PA, and standard-dfinition digital TV (SDTV) vido systms. Th output buffrs hav a fixd gain of +6dB and ar capabl of driving two standard 15Ω vido loads. Th channl for CVBS vido has high-frquncy boost circuitry that nhancs pictur sharpnss with up to +1.dB of gain boost without dgradation in th stopband. Th vido output drivrs can b disabld by an xtrnal control input. Th is availabl in a 16-pin, 5mm x 5mm x.8mm TQFN packag, and is spcifid ovr th xtndd (- C to +85 C) tmpratur rang. STBs/HDRs Gam Consols Dsktop Vido Editors Applications DVD Playrs Digital VCRs Faturs -Channl Vido Filtr/Buffr for RGB and CVBS Signals with Auxiliary Input Allows Auxiliary Input for CVBS Vido oop- Through Applications Filtr Rspons Idal for NTSC, PA, and Intrlacd SDTV Vido Signals 3dB (typ) Stopband Attnuation at 7MHz ±.75dB (max) Passband Rippl Out to 5MHz Blanking vl Voltag on Cabl <1V Each Channl Drivs Two 15Ω Vido oads +5V Singl-Supply Opration Availabl in 5mm x 5mm x.8mm, 16-Pin TQFN Ordring Information PART TEMP RANGE PIN-PACKAGE PKG CODE ETE - C to +85 C 16 TQFN-EP T1655- EP = Exposd pad. Pin Configuration appars at nd of data sht. Typical Oprating Circuit AUXIIARY VIDEO SOURCE (VCR, DVD, ETC.) ENCODER CVBS D/A INA INA1 SEA -TO-1 MUX OWPASS FITER V CC SYNC DETECTOR +6dB OUTA R D/A INB OWPASS FITER +6dB OUTB G D/A INC OWPASS FITER +6dB OUTC B D/A IND OWPASS FITER +6dB OUTD GND OPTIONA CAPACITORS DISABE Maxim Intgratd Products 1 For pricing, dlivry, and ordring information, plas contact Maxim/Dallas Dirct! at , or visit Maxim s wbsit at

2 ABSOUTE MAXIMUM RATINGS V CC to GND...-.3V to +6V INA1, INA, INB, INC, IND to GND...-.3V to (V CC +.3V) OUTA, OUTB, OUTC, OUTD to GND...-.3V to (V CC +.3V) SEA, DISABE to GND...-.3V to (V CC +.3V) Maximum Currnt into Any Pin Excpt V CC and GND...±5mA Continuous Powr Dissipation (T A = +7 C) 16-Pin TQFN (drat.8mw/ C abov +7 C) mW Oprating Tmpratur Rang...- C to +85 C Storag Tmpratur Rang C to +15 C Junction Tmpratur C ad Tmpratur (soldring, 1s)...+3 C Strsss byond thos listd undr Absolut Maximum Ratings may caus prmannt damag to th dvic. Ths ar strss ratings only, and functional opration of th dvic at ths or any othr conditions byond thos indicatd in th oprational sctions of th spcifications is not implid. Exposur to absolut maximum rating conditions for xtndd priods may affct dvic rliability. EECTRICA CHARACTERISTICS (V CC = +5V ±5%, C = to pf, R = to GND for DC-coupld load, R = to V CC / for AC-coupld load, T A = T MIN to T MAX, unlss othrwis notd. Typical valus ar at V CC = 5V, T A = +5 C.) Passband Flatnss PARAMETER SYMBO CONDITIONS MIN TYP MAX UNITS f = 1kHz to 5MHz, rlativ to 1kHz Channl INA_ Channls INB, INC, IND Stopband Attnuation A SB f 7MHz 3 db Diffrntial Gain dg 5-stp modulatd staircas.15.5 % Diffrntial Phas dθ 5-stp modulatd staircas.15.5 Dgrs Signal-to-Nois Ratio SNR Group Dlay Dviation t g Dviation from 1kHz to.1mhz Pak signal (V P-P ) to RMS nois, f = 1Hz to 5MHz db 8 db Channl INA_ 17 3 Channls INB, INC, IND 11 in-tim Distortion H DIST 18µs, 1 IRE bar.3 % Fild-Tim Distortion V DIST 13 lins, 18µs, 1 IRE bar.5 % Clamp Sttling Tim t CAMP To ±1% 3 ins Output DC Clamp vl Channl INA_ Channl INB, INC, IND ow-frquncy Gain Accuracy A V f = 1kHz, rlativ to gain of +6dB % ow-frquncy Gain Matching A V(MATCH) ow-frquncy channl-to-channl matching, f = 1kHz Group Dlay Matching t g (MATCH) ow-frquncy channl-to-channl matching, f = 1kHz ns V % ns Channl-to-Channl Crosstalk X TAK f = 1kHz to 3.58MHz -6 db Disabld Output Impdanc Z DISABE At 5MHz kω Output Short-Circuit Currnt I SC OUT_ shortd to GND or V CC 7 ma

3 EECTRICA CHARACTERISTICS (continud) (V CC = +5V ±5%, C = to pf, R = to GND for DC-coupld load, R = to V CC / for AC-coupld load, T A = T MIN to T MAX, unlss othrwis notd. Typical valus ar at V CC = 5V, T A = +5 C.) PARAMETER SYMBO CONDITIONS MIN TYP MAX UNITS Input akag Currnt I IN 1 µa Input Dynamic Swing Channl INA_ 1. Channls INB, INC, IND.9 Mux Crosstalk f = 1kHz to.1mhz -6 db SUPPY Supply Voltag Rang V CC V Supply Currnt I CC No load 1 1 ma Powr-Supply Rjction Ratio PSRR V IN = 1mV P-P, f = to 3.5MHz db OGIC INTERFACE ogic Input High Voltag V IH. V ogic Input ow Voltag V I.8 V ogic Input Currnt V I = (sink), V IH = V CC (sourc) ±1 µa V P-P (V CC = +5V, T A = +5 C, unlss othrwis notd.) Typical Oprating Charactristics AMPITUDE vs. FREQUENCY toc PASSBAND AMPITUDE vs. FREQUENCY toc 15 PHASE RESPONSE vs. FREQUENCY toc3 AMPITUDE (db) AMPITUDE (db) CHANNE INA_ CHANNES INB/INC/IND PHASE (DEGREES) CHANNE INA_ FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) 3

4 Typical Oprating Charactristics (continud) (V CC = +5V, T A = +5 C, unlss othrwis notd.) GROUP DEAY (ns) GROUP DEAY vs. FREQUENCY toc IN_ 3mV/div OUT_ 3mV/div T RESPONSE (1 IRE = 7.1mV) toc5 IN_ 3mV/div OUT_ 3mV/div MODUATED 1.5T RESPONSE (1 IRE = 7.1mV) toc FREQUENCY (MHz) ns/div µs/div SUPPY CURRENT (ma) SUPPY CURRENT vs. TEMPERATURE INPUTS BIASED TO +V NO OAD TEMPERATURE ( C) toc7 DIFFERENTIA GAIN (%) DIFFERENTIA PHASE (DEGREES) DIFFERENTIA GAIN DIFFERENTIA PHASE toc8 IN_ 5mV/div OUT_ 5mV/div MUTIBURST RESPONSE toc9 1µs/div

5 PIN NAME FUNCTION 1 INB INC 3 IND Pin Dscription Channl INB Vido Input. Us channl INB for th rd (R) signal. AC-coupl INB with a sris capacitor. Channl INC Vido Input. Us channl INC for th grn (G) signal. AC-coupl INC with a sris capacitor. Channl IND Vido Input. Us channl IND for th blu (B) signal. AC-coupl IND with a sris capacitor. DISABE Disabl ogic Input. A logic low on DISABE nabls th output buffrs. A logic high on DISABE disabls all buffr outputs and puts thm in a high-impdanc stat. 5 SEA Slct A Input. A logic low on SEA slcts INA1 and a logic high on SEA slcts INA. 6, 8, 1 N.C. No Connction. Not intrnally connctd. 7 GND Ground 9 V CC +5V Supply Input 1 OUTD Channl D Vido Output. OUTD can b ithr AC- or DC-coupld. 11 OUTC Channl C Vido Output. OUTC can b ithr AC- or DC-coupld. 1 OUTB Channl B Vido Output. OUTB can b ithr AC- or DC-coupld. 13 OUTA Channl A Vido Output. OUTA can b ithr AC- or DC-coupld. 15 INA Channl INA Vido Input. Connct auxiliary CVBS to INA. AC-coupl INA with a sris capacitor. 16 INA1 Channl INA1 Vido Input. Connct CVBS to INA1. AC-coupl INA1 with a sris capacitor. EP Exposd Pad. Connct to GND for improvd thrmal hat sinking. Dtaild Dscription Th -channl vido switch filtrs and buffrs vido ncodr DAC outputs in applications such as STBs, HDRs, DVD playrs, and digital VCRs. Th offrs an auxiliary CVBS loop-through fatur rquird in dual SCART applications. Audio and vido switching in SCART STBs utiliz a costly intgratd A/V switch offring high-nd faturs such as volum control and high audio-driv capability. A mor cost-ffctiv solution uss th for th vido switching along with low-cost standard passiv analog switchs for th audio switching. Th rconstructs and clans up analog vido signals from th vido ncodr s DAC output. Each channl consists of a lowpass filtr and an output vido buffr that drivs two standard 15Ω vido loads. Th oprats from a singl +5V supply and has a nominal cutoff frquncy of 5MHz, optimizd for NTSC, PA, and SDTV. Filtr Filtr Rspons Th rconstruction filtr consists of two nd-ordr Salln-Ky stags. Th Buttrworth-typ rspons faturs a maximally flat passband for NTSC and PA bandwidths. Th stopband offrs at last 3dB (typ) of attnuation at th vido ncodr s DAC sampling frquncy of 7MHz (s th Typical Oprating Charactristics). High-Frquncy Boost INA1/INA hav +1.dB of high-frquncy boost that incrass imag sharpnss by compnsating for signal dgradation and rolloff in th vido ncodr. Channls INB/INC/IND (RGB) do not boost high-frquncy signals and hav a flat rspons ovr th vido bandwidth. 5

6 Output Buffrs Each output buffr has a fixd gain of +6dB and can driv two 15Ω vido loads with a V P-P signal. Th can driv an AC-coupld load or driv a DCcoupld load, liminating th larg coupling capacitors. Th output buffrs driv DC loads with an output blanking lvl of lss than 1V. Output Clamp vl Th vido signal procssd by channl INA_ (CVBS vido signal) must includ a sync puls. This sync puls provids th rquird timing to all four channls. Whn channl INA_ dtcts a sync puls, th DC rstor loop is activatd. Th function of th loop is to st th DC lvl of th vido signal to a spcifid voltag. S Tabl 1 for clamp lvls. Tabl 1. Output Clamp vl CHANNE CAMP EVE (V) A.9 B 1.5 C 1.5 D 1.5 Input Multiplxr Th has a -to-1 input multiplxr at channl INA_. Th input to th CVBS channl coms from ithr a DAC output or from a CVBS sourc and is slctd by SEA. Pull SEA low to slct INA1 or high to slct INA. Applications Information Input Considrations Us cramic capacitors to AC-coupl th inputs. Th input capacitors stor a DC lvl so th outputs ar clampd to an appropriat DC voltag lvl. Output Considrations Th outputs ar typically connctd to a sris back-match rsistor followd by th vido cabl. Bcaus of th inhrnt divid-by-two of this configuration, th voltag on th vido cabl is always lss than 1V, complying with industry-standard vido rquirmnts such as th Europan SCART standard (which allows up to V of DC on th vido cabl). Th vido buffr can also driv an AC-coupld vido load. An output capacitor as low as µf provids good vido prformanc. Powr-Supply Bypassing and ayout Th oprats from a singl +5V supply. Bypass V CC to GND with a capacitor. Plac all xtrnal componnts as clos to th dvic as possibl. Exposd Pad Th TQFN packag has an xposd pad on th bottom of th packag. This pad is lctrically connctd to GND and should b connctd to th ground plan for improvd thrmal conductivity. Do not rout signals undr this packag. Pin Configuration Chip Information TRANSISTOR COUNT: 579 TOP VIEW INA1 INA N.C. OUTA PROCESS: BiCMOS INB 1 1 OUTB INC IND OUTC OUTD DISABE 9 V CC SEA N.C. GND TQFN N.C. 6

7 Packag Information (Th packag drawing(s) in this data sht may not rflct th most currnt spcifications. For th latst packag outlin information go to MARKING D D/ AAAAA E/ k D C D/ b.1 M C A B E/ QFN THIN.EPS E (NE-1) X C E PIN # 1 I.D. DETAI A / PIN # 1 I.D..35x5 (ND-1) X DETAI B 1 C C.1 C A.8 C C A1 A3 PACKAGE OUTINE, -DRAWING NOT TO SCAE- 16,, 8, 3, THIN QFN, 5x5x.8mm 1-1 I 1 COMMON DIMENSIONS EXPOSED PAD VARIATIONS PKG. 16 5x5 5x5 8 5x5 3 5x5 5x5 PKG. D E DOWN xcptions SYMBO MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. BONDS CODES MIN. NOM. MAX. MIN. NOM. MAX. ±.15 AOWED A T YES A T NO A3. REF.. REF.. REF.. REF.. REF. T1655N NO b T YES D T NO E T YES.8 BSC..65 BSC..5 BSC..5 BSC.. BSC. k T YES T YES T NO.3..5 N T NO ND T YES NE T YES JEDEC WHHB WHHC WHHD-1 WHHD T855N NO T YES NOTES: T NO 1. DIMENSIONING & TOERANCING CONFORM TO ASME Y1.5M-199. T YES T355N A DIMENSIONS ARE IN MIIMETERS. ANGES ARE IN DEGREES. NO T N IS THE TOTA NUMBER OF TERMINAS. YES SEE COMMON DIMENSIONS TABE. THE TERMINA #1 IDENTIFIER AND TERMINA NUMBERING CONVENTION SHA CONFORM TO JESD 95-1 SPP-1. DETAIS OF TERMINA #1 IDENTIFIER ARE OPTIONA, BUT MUST BE OCATED WITHIN THE ZONE INDICATED. THE TERMINA #1 IDENTIFIER MAY BE EITHER A MOD OR MARKED FEATURE. 5. DIMENSION b APPIES TO METAIZED TERMINA AND IS MEASURED BETWEEN.5 mm AND.3 mm FROM TERMINA TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINAS ON EACH D AND E SIDE RESPECTIVEY. 7. DEPOPUATION IS POSSIBE IN A SYMMETRICA FASHION. 8. COPANARITY APPIES TO THE EXPOSED HEAT SINK SUG AS WE AS THE TERMINAS. 9. DRAWING CONFORMS TO JEDEC MO, EXCEPT EXPOSED PAD DIMENSION FOR T855-3 AND T WARPAGE SHA NOT EXCEED.1 mm. 11. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONY. 1. NUMBER OF EADS SHOWN ARE FOR REFERENCE ONY. 13. EAD CENTERINES TO BE AT TRUE POSITION AS DEFINED BY BASIC DIMENSION "", ±.5. -DRAWING NOT TO SCAE- PACKAGE OUTINE, 16,, 8, 3, THIN QFN, 5x5x.8mm 1-1 I 7

8 Packag Information (continud) (Th packag drawing(s) in this data sht may not rflct th most currnt spcifications. For th latst packag outlin information go to MARKING D D/ AAAAA E/ k D C D/ b.1 M C A B E/ QFN THIN.EPS E (NE-1) X C E PIN # 1 I.D. DETAI A / PIN # 1 I.D..35x5 (ND-1) X DETAI B 1 C C.1 C A.8 C C A1 A3 PACKAGE OUTINE, -DRAWING NOT TO SCAE- 16,, 8, 3, THIN QFN, 5x5x.8mm 1-1 I 1 COMMON DIMENSIONS EXPOSED PAD VARIATIONS PKG. 16 5x5 5x5 8 5x5 3 5x5 5x5 PKG. D E DOWN xcptions SYMBO MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. BONDS CODES MIN. NOM. MAX. MIN. NOM. MAX. ±.15 AOWED A T YES A T NO A3. REF.. REF.. REF.. REF.. REF. T1655N NO b T YES D T NO E T YES.8 BSC..65 BSC..5 BSC..5 BSC.. BSC. k T YES T YES T NO.3..5 N T NO ND T YES NE T YES JEDEC WHHB WHHC WHHD-1 WHHD T855N NO T YES NOTES: T NO 1. DIMENSIONING & TOERANCING CONFORM TO ASME Y1.5M-199. T YES T355N A DIMENSIONS ARE IN MIIMETERS. ANGES ARE IN DEGREES. NO T N IS THE TOTA NUMBER OF TERMINAS. YES SEE COMMON DIMENSIONS TABE. THE TERMINA #1 IDENTIFIER AND TERMINA NUMBERING CONVENTION SHA CONFORM TO JESD 95-1 SPP-1. DETAIS OF TERMINA #1 IDENTIFIER ARE OPTIONA, BUT MUST BE OCATED WITHIN THE ZONE INDICATED. THE TERMINA #1 IDENTIFIER MAY BE EITHER A MOD OR MARKED FEATURE. 5. DIMENSION b APPIES TO METAIZED TERMINA AND IS MEASURED BETWEEN.5 mm AND.3 mm FROM TERMINA TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINAS ON EACH D AND E SIDE RESPECTIVEY. 7. DEPOPUATION IS POSSIBE IN A SYMMETRICA FASHION. 8. COPANARITY APPIES TO THE EXPOSED HEAT SINK SUG AS WE AS THE TERMINAS. 9. DRAWING CONFORMS TO JEDEC MO, EXCEPT EXPOSED PAD DIMENSION FOR T855-3 AND T WARPAGE SHA NOT EXCEED.1 mm. 11. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONY. 1. NUMBER OF EADS SHOWN ARE FOR REFERENCE ONY. 13. EAD CENTERINES TO BE AT TRUE POSITION AS DEFINED BY BASIC DIMENSION "", ±.5. PACKAGE OUTINE, 16,, 8, 3, THIN QFN, 5x5x.8mm -DRAWING NOT TO SCAE- 1-1 I Maxim cannot assum rsponsibility for us of any circuitry othr than circuitry ntirly mbodid in a Maxim product. No circuit patnt licnss ar implid. Maxim rsrvs th right to chang th circuitry and spcifications without notic at any tim. 8 Maxim Intgratd Products, 1 San Gabril Driv, Sunnyval, CA Maxim Intgratd Products Printd USA is a rgistrd tradmark of Maxim Intgratd Products, Inc.

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