LINEAR TECHNOLOGY LTC6909 3 Si 8 Ijade Multiphase Oscillator pẹlu SSFM

Apejuwe

Circuit ifihan 1446 ṣe ẹya LTC6909 olona-ple oscillator o wu pupọ pẹlu awose igbohunsafẹfẹ igbohunsafẹfẹ itankale (SSFM). LTC®6909 jẹ irọrun lati lo oscillator pipe ti o le pese awọn abajade amuṣiṣẹpọ 1-, 2-, 3-, 4-, 5-, 6-, 7- tabi 8-fase. LTC6909 tan kaakiri spekitiriumu igbohunsafẹfẹ awose (SSFM), le ti wa ni sise lati mu itanna ibamu (EMC) išẹ. Awọn ọnajade lọtọ mẹjọ pese to awọn iṣinipopada-si-iṣinipopada mẹjọ, 50% awọn ifihan agbara aago iṣẹ. Lilo awọn igbewọle ọgbọn mẹta, awọn abajade jẹ tunto fun ipinya apakan, ti o wa lati 45 ° si 120 ° (awọn ipele mẹta si mẹjọ). Awọn abajade aago le tun waye ni kekere tabi tunto fun Hi-Z. Atako ẹyọkan (RSET) ni idapo pẹlu iṣeto ni alakoso, ṣeto ipo igbohunsafẹfẹ, da lori agbekalẹ atẹle:
fOUT = (20MHz x 10k)/(RSET x PH)
nibiti PH = 3, 4, 5, 6, 7 tabi 8
Iwọn fOUT jẹ 12.5kHz si 6.67MHz.
Awọn igbewọle ọgbọn PH0, PH1 ati PH2 ṣalaye ipo iṣẹ-ọna pupọ LTC6909 ati ṣakoso awọn abajade rẹ bi atẹle:

PH2 PH1 PH0 MODE
0 0 0 Gbogbo Awọn Ijade Ni Lilefoofo (Hi-Z)
0 0 1 Gbogbo Awọn abajade ti wa ni Dimu Kekere
0 1 0 3-Ipo Ipele (PH = 3)
0 1 1 4-Ipo Ipele (PH = 4)
1 0 0 5-Ipo Ipele (PH = 5)
1 0 1 6-Ipo Ipele (PH = 6)
1 1 0 7-Ipo Ipele (PH = 7)
1 1 1 8-Ipo Ipele (PH = 8)

A DC1446 ni LTC6909 kan ati awọn ebute idanwo fun awọn abajade mẹjọ. Lori ọkọ jumpers ti wa ni pese lati ṣeto awọn igbewọle alakoso LTC6909 (PH0, PH1 ati PH2) ati awọn SSFM awose. Eto ipo igbohunsafẹfẹ lori ọkọ resis-tor (RSET) ti wa ni iṣaaju-iṣaaju pẹlu 100k dada òke re-arabinrin (ni afikun, meji pin receptacles ti wa ni pese fun lilo a asiwaju RSET resistor).

Apẹrẹ files fun yi Circuit ọkọ wa o si wa.

Pe ile-iṣẹ LTC. LTC, LT jẹ aami-išowo ti a forukọsilẹ ti Linear Technology Corporation.

KI Bẹrẹ Ilana

Circuit ifihan 1446 rọrun lati ṣeto ati idanwo. Tọkasi Nọmba 1 fun iṣeto idanwo iyara ati tẹle ilana ni isalẹ:

1. Gbe awọn jumpers si awọn ipo wọnyi:
   JP3 (PH0) to V+, JP4 (PH1) to V+, JP1 (PH2) to V+ ati JP1 (MOD) to SSFM PA.
2. 2. Ṣeto ipese agbara si 5V.
3. Tan ipese agbara.
4. Pẹlu iwadii 10x ti a ti sopọ si OUT1 oscilloscope yẹ ki o ṣafihan 5V, 250kHz, squarewave (± 4.5%).

Eto-Ibere ​​ni kiakia

AKIYESI: Awọn abajade 6909 (OUT1-OUT8) le wakọ awọn ẹru 1k ati 50pF. Ti o ba ti lo oluyẹwo spekitiriumu lati wiwọn bandiwidi spekitiriumu itankale lẹhinna lo iwadii impedance giga kan lati ṣe atẹle awọn abajade (eyiti o jẹ aipe titẹ sii ti oluyanju irisi jẹ 50 ohms).

DEMO CIRCUIT 1446 Itọsọna Ibẹrẹ ni iyara – LTC6909 3 SI 8 OUTPUT Multiphase OSCILLATOR PẸLU SSFM

DC1446 Awọn ẹya ara akojọ

Nkan Itọkasi Qty Apa Apejuwe Olupese / Apa #
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, OGEDE 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 ORI ILA KỌKAN SAMTEC, TMM103-02-LS
8 1 JP2 2X4, 0.079 ORI ORI ILA méji SAMTEC, TMM104-02-LD
9 4 xJP1-xJP4 SHUNT, .079 inch CENTER SAMTEC, 2SN-BK-G
10 0 RSET(ṣii) Res., 0805
11 2 E13,E14 Pin, 0.057 iho Mill-Max, 8427-0-15-15-30-84-04-0
12 1 U1 IC., LTC6909CMS, MSOP-16 Imọ-ẹrọ Linear., LTC6909CMS
13 4 (Iduro-PA) Iduro-PA, NYLON 0.375 ″ KEYSTONE, 8832(SNAP LORI)

Awọn iwe aṣẹ / Awọn orisun

LINEAR TECHNOLOGY LTC6909 3 Si 8 Ijade Multiphase Oscillator pẹlu SSFM [pdf] Itọsọna olumulo LTC6909 3 Si 8 Oscillator Multiphase Output with SSFM, LTC6909, 3 Si 8 Oscillator Multiphase Output with SSFM

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