LINEAR TECHNOLOGY LTC6909 3 Ho isa ho 8 Output Multiphase Oscillator with SSFM
TLHALOSO
Potoloho ea 1446 e na le LTC6909 multi-ple output oscillator e nang le spread spectrum frequency modulation (SSFM). LTC®6909 e bonolo ho sebelisa oscillator e nepahetseng e ka fanang ka 1-, 2-, 3-, 4-, 5-, 6-, 7- kapa 8-phase synchronized outputs. LTC6909 spread spectrum frequency modulation (SSFM), e ka nolofalletsa ho ntlafatsa ts'ebetso ea electromagnetic comppatibility (EMC). Liphetho tse robeli tse arohaneng li fana ka matšoao a ho fihla ho a robeli ho isa ho terene, 50% ea matshwao a oache ea mosebetsi. Ho sebelisa lintlha tse tharo tsa logic, liphello li lokiselitsoe karohano ea mekhahlelo, ho tloha ho 45 ° ho ea ho 120 ° (mekhahlelo e meraro ho isa ho e robeli). Liphetho tsa oache le tsona li ka tšoareloa tlase kapa tsa hlophisoa bakeng sa Hi-Z. Mohanyetsi o le mong (RSET) o kopantsoeng le tlhophiso ea mohato, o beha frequency ea tlhahiso, e ipapisitse le foromo e latelang:
FOUT = (20MHz x 10k)/(RSET x PH)
moo PH = 3, 4, 5, 6, 7 kapa 8
FOUT mefuta e fapaneng ke 12.5kHz ho 6.67MHz.
Maikutlo a PH0, PH1 le PH2 a hlalosa mokhoa oa ts'ebetso oa LTC6909 oa mekhahlelo e mengata mme o laola liphetho tsa ona ka tsela e latelang:
PH2 PH1 PH0 MOKHOA
0 0 0 All Outputs Are Floating (Hi-Z)
0 0 1 Litholoana Tsohle li Tšoaroa Ka Tlase
0 1 0 3-Mokhoa oa Mokhahlelo (PH = 3)
0 1 1 4-Mokhoa oa Mokhahlelo (PH = 4)
1 0 0 5-Mokhoa oa Mokhahlelo (PH = 5)
1 0 1 6-Mokhoa oa Mokhahlelo (PH = 6)
1 1 0 7-Mokhoa oa Mokhahlelo (PH = 7)
1 1 1 8-Mokhoa oa Mokhahlelo (PH = 8)
DC1446 e na le LTC6909 le liteishene tsa liteko bakeng sa liphetho tse robeli. Ho fanoa ka li-jumpers tsa boto ho hlophisa lintlha tsa LTC6909 (PH0, PH1 le PH2) le modulation ea SSFM. The on board frequency setting resis-tor (RSET) e kentsoe esale pele ka 100k surface mount re-sistor (ho feta moo, ho fanoa ka liphahlo tse peli bakeng sa ho sebelisa mohanyetsi oa RSET o etelletsoeng pele).
Moralo files bakeng sa boto ena ea potoloho li fumaneha.
Letsetsa feme ea LTC. LTC, LT ke matshwao a kgwebo a ngodisitsweng a Linear Technology Corporation.
TSELA E QALANG HO QALA
Pontšo ea potoloho ea 1446 e bonolo ho e qala le ho e leka. Sheba Setšoantšo sa 1 bakeng sa tlhahlobo e potlakileng ea tlhahlobo 'me u latele mokhoa o ka tlase:
- Beha li-jumpers maemong a latelang:
JP3 (PH0) ho ea ho V+, JP4 (PH1) ho ea ho V+, JP1 (PH2) ho ea ho V+ le JP1 (MOD) ho ea ho SSFM OFF. - 2. Beha motlakase ho 5V.
- Bulela phepelo ea motlakase.
- Ka probe ea 10x e hoketsoeng ho OUT1 oscilloscope e lokela ho bonts'a 5V, 250kHz, squarewave (±4.5%).
PHETHA KA POTLAKO 
HLOKOMELA: Liphetho tsa 6909 (OUT1-OUT8) li ka khanna meroalo ea 1k le 50pF. Haeba spectrum analyzer e sebelisoa ho lekanya spectrum spectrum bandwidth joale sebelisa phuputso e phahameng ea impedance ho beha leihlo liphetho (hangata tšitiso e kenang ea spectrum analyzer ke 50 ohms).
DEMO CIRCUIT 1446 TATAISO EA HO QALA KA POTLAKO – LTC6909 3 HO 8 HO HLAHALA MULTIPHASE OSCILLATOR KA SSFM 
DC1446 LIKAROLO LESELI
Ntho ea Qty Reference Part Description Moetsi / Karolo ea #
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 RSET(open) Res., 0805
11 2 E13,E14 Pin, 0.057 hole Mill-Max, 8427-0-15-15-30-84-04-0
12 1 U1 IC., LTC6909CMS, MSOP-16 Linear Tech., LTC6909CMS
13 4 (STAND-OFF) STAND-OFF, NAYLON 0.375″ KEYSTONE, 8832(SNAP ON)
Litokomane / Lisebelisoa
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LINEAR TECHNOLOGY LTC6909 3 Ho isa ho 8 Output Multiphase Oscillator with SSFM [pdf] Bukana ea Mosebelisi LTC6909 3 Ho isa ho 8 Output Multiphase Oscillator with SSFM, LTC6909, 3 To 8 Output Multiphase Oscillator with SSFM |
