I-LINEAR TECHNOLOGY LTC6909 3 Ukuya ku-8 Imveliso ye-Multiphase Oscillator ene-SSFM
INKCAZO
Isekethe yokubonisa i-1446 ifaka i-oscillator ye-LTC6909 ye-multi-ple output nge-spread spectrum frequency modulation (SSFM). I-LTC®6909 kulula ukuyisebenzisa i-oscillator echanekileyo enokubonelela nge-1-, 2-, 3-, 4-, 5-, 6-, 7- okanye 8-isigaba seziphumo ezihambelanayo. I-LTC6909 yokusabalalisa i-spectrum frequency modulation (SSFM), inokwenziwa ukuba iphucule ukusebenza kwe-electromagnetic comppatibility (EMC). Iziphumo ezisibhozo ezahlukeneyo zibonelela ukuya kuthi ga kwisibhozo sikaloliwe ukuya kuloliwe, i50% yeempawu zewotshi yomjikelo womsebenzi. Ukusebenzisa i-logic inputs ezintathu, iziphumo zilungiselelwe ukwahlukana kwesigaba, ukusuka kwi-45 ° ukuya kwi-120 ° (izigaba ezithathu ukuya kwezisibhozo). Iziphumo zewotshi zinokubanjwa ziphantsi okanye ziqwalaselwe i-Hi-Z. I-resistor enye (i-RSET) idityaniswe noqwalaselo lwesigaba, ibeka i-frequency yemveliso, ngokusekelwe kule fomula ilandelayo:
FOUT = (20MHz x 10k)/(RSET x PH)
apho iPH = 3, 4, 5, 6, 7 okanye 8
uluhlu lwe-FOUT yi-12.5kHz ukuya kwi-6.67MHz.
I-PH0, i-PH1 kunye ne-PH2 igalelo elinengqondo lichaza indlela ye-LTC6909 yezigaba ezininzi zokusebenza kunye nokulawula iziphumo zayo ngolu hlobo lulandelayo:
PH2 PH1 PH0 INDLELA
0 0 0 Zonke Iziphumo Ziyadada (Hi-Z)
0 0 1 Zonke Iziphumo Zibanjwe Phantsi
0 1 0 Imo yeSigaba esi-3 (PH = 3)
0 1 1 Imo yeSigaba esi-4 (PH = 4)
1 0 0 Imo yeSigaba esi-5 (PH = 5)
1 0 1 Imo yeSigaba esi-6 (PH = 6)
1 1 0 Imo yeSigaba esi-7 (PH = 7)
1 1 1 8-Imo yeSigaba (PH = 8)
I-DC1446 iqulethe i-LTC6909 kunye neetheminali zovavanyo lweziphumo ezisibhozo. Kwibhodi yokuxhuma i-jumpers ibonelelwe ukuseta i-LTC6909 yesigaba segalelo (PH0, PH1 kunye ne-PH2) kunye nokuguqulwa kwe-SSFM. I-onboard frequency setting resis-tor (RSET) ilayishwe kwangaphambili nge-100k surface mount re-sistor (ukongeza, izikhongozelo ezimbini zepini zibonelelwa ngokusetyenziswa kwe-RSET ekhokelayo).
Yila files kule bhodi yesekethe ziyafumaneka.
Fowunela umzi-mveliso we-LTC. I-LTC, LT ziimpawu zorhwebo ezibhalisiweyo ze-Linear Technology Corporation.
INKQUBO YOKUQALA NGOKUKHAWULEZA
Umboniso wesekethe 1446 kulula ukuseta kunye nokuvavanya. Jonga kwiSazobe soku-1 ukuseta uvavanyo olukhawulezayo kwaye ulandele inkqubo engezantsi:
- Beka izijumpi kwezi ndawo zilandelayo:
JP3 (PH0) ukuya V +, JP4 (PH1) ukuya V +, JP1 (PH2) ukuya V + kunye JP1 (MOD) ukuba SSFM OFF. - 2. Misela unikezelo lwamandla kwi-5V.
- Vula unikezelo lombane.
- Ngeprobe ye-10x eqhagamshelwe kwi-OUT1 i-oscilloscope kufuneka ibonise i-5V, 250kHz, i-squarewave (± 4.5%).
UKUQALA NGOKUKHAWULELAYO 
PHAWULA: Iziphumo ze-6909 (OUT1-OUT8) zinokuqhuba imithwalo ye-1k kunye ne-50pF. Ukuba i-spectrum analyzer isetyenziselwa ukulinganisa i-spectrum spectrum bandwidth ke sebenzisa i-impedance probe ephezulu ukujonga iziphumo (ngokuqhelekileyo i-impedance yegalelo ye-spectrum analyzer yi-50 ohms).
IDEMO CIRCUIT 1446 ISIKHOKELO SOKUQALA NGOKUKHAWUZIYO – LTC6909 3 UKUYA 8 ISIPHUMO SESIGQIBA ESININZI NGE-SSFM 
DC1446 ULUHLU lweengxenye
Inqaku leNgcaciso yeNgcaciso yeCandelo leNgcaciso yoMvelisi / Icandelo #
1 1 C1 CAP., X7R, 10uF, 10V, 20% 1206 AVX, 1206ZC106MAT2A
2 2 C5,C2 CAP., X7R, 0.1uF, 16V, 10% 0402 TDK, C1005X7R1C104K
3 2 C3,C6 CAP., X5R, 1uF, 6.3V, 10% 0402 TDK, C1005X5R0J105K
4 1 C4 CAP., C0G, 1000pF, 25V, 5% 0402 TDK, C1005C0G1E102J
5 2 E1, E2 JACK, BANANA KEYSTONE, 575-4
6 10 E3-E12 TESTPOINT, TURRET, .094″ pbf MILL-MAX, 2501-2-00-80-00-00-07-0
7 3 JP1,JP3,JP4 3 PIN 0.079 SINGLE ROW HEADER SAMTEC, TMM103-02-LS
8 1 JP2 2X4, 0.079 DOUBLE ROW HEADER SAMTEC, TMM104-02-LD
9 4 xJP1-xJP4 SHUNT, .079″ CENTRE SAMTEC, 2SN-BK-G
10 0 I-RSET(evuliwe) Res., 0805
11 2 E13,E14 Pin, 0.057 umngxuma Mill-Max, 8427-0-15-15-30-84-04-0
12 1 U1 IC., LTC6909CMS, MSOP-16 Linear Tech., LTC6909CMS
13 4 (IME-OFF) STAND-OFF, INYLON 0.375″ KEYSTONE, 8832(SNAP ON)
Amaxwebhu / Izibonelelo
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I-LINEAR TECHNOLOGY LTC6909 3 Ukuya ku-8 Imveliso ye-Multiphase Oscillator ene-SSFM [pdf] Isikhokelo somsebenzisi LTC6909 3 Ukuya ku-8 Isiphumo se-Multiphase Oscillator ene-SSFM, LTC6909, 3 ukuya ku-8 Isiphumo se-Multiphase Oscillator ene-SSFM |
