- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377781 > LTC6902IMS (LINEAR TECHNOLOGY CORP) Multiphase Oscillator with Spread Spectrum Frequency Modulation PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC6902IMS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | XO, clock |
| 英文描述： | Multiphase Oscillator with Spread Spectrum Frequency Modulation |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 212K |
| 代理商： | LTC6902IMS |
LTC6902
9
6902f
divider goes through further division. In addition to fur-
ther division, the duty cycle of the output depends on the
multiphase mode selected. Figure 4 shows the waveform
at each output for 2-, 3- and 4-phase modes.
2-Phase Mode
In 2-phase mode, all outputs are nominally 50% duty
cycle. OUT1 and OUT2 are 180 degrees out of phase.
Stated differently, OUT2 is OUT1 inverted. However, OUT2
THEORY OF OPERATIOU
is
not
simply OUT1 routed through a standard logic
inverter. This would lead to substantial delay for OUT2’s
transitions from OUT1’s transitions. OUT1 and OUT2 are
created by a delay matched inverting circuit. Apart from
the basic inversion, the delay matching is determined by
analog circuit parameters. With this type of design, OUT1
and OUT2 transitions are typically within 100ps. OUT3 and
OUT4 are replications of OUT1 and OUT2 respectively.
Since the two phases are generated via delay matched
inverters, there is not any further division and the param-
eter M in the frequency setting equation is 1 (M = 1).
3-Phase Mode
In 3-phase mode, OUT1, OUT2 and OUT3 are active and all
three outputs have a 33.3% duty cycle. OUT4 is not active
and is at a logic low state. The three active outputs are all
120 degrees out of phase. OUT2 lags OUT1 by 120 degrees
and OUT3 lags OUT2 by 120 degrees. The signals are
generated by a shift register. The output frequency is the
programmable divider’s output further divided 3 (M = 3).
4-Phase Mode
In 4-phase mode, all outputs have a 50% duty cycle. The
outputs are all 90 degrees out of phase. OUT2 lags OUT1
Figure 3. R
SET
vs Desired Output Frequency
(PH = GND, 2-Phase, M = 1)
OUT1
2-PHASE, PH = GND
OUT2
OUT3
OUT4
OUT1
3-PHASE, PH = OPEN
OUT2
OUT3
OUT4
OUT1
4-PHASE, PH = V
+
OUT2
OUT3
OUT4
M = 1
DUTY CYCLE = 50%
M = 3
DUTY CYCLE = 33%
(OUT4 = LOGIC LOW)
M = 4
DUTY CYCLE = 50%
69012 F04
Figure 4. Mulitphase Output Waveforms
DESIRED OUTPUT FREQUENCY (Hz)
10
R
S
)
100
1k
100k
1M
10M
69012 F03
1
10k
10000
1000
100M
÷
100
÷
10
÷
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC6904HMS8 | 1kHz - 68MHz Serial Port Programmable Oscillator |
| LTC6903IMS8 | 1kHz - 68MHz Serial Port Programmable Oscillator |
| LTC6904IMS8 | 1kHz - 68MHz Serial Port Programmable Oscillator |
| LTC6903HMS8 | 1kHz - 68MHz Serial Port Programmable Oscillator |
| LTC6903 | 1kHz - 68MHz Serial Port Programmable Oscillator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC6902IMS#PBF | 功能描述:IC OSC SILICON 20MHZ 10MSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 可編程計(jì)時(shí)器和振蕩器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 類型:振蕩器 - 晶體 計(jì)數(shù):- 頻率:- 電源電壓:2.3 V ~ 5.5 V 電流 - 電源:1.07mA 工作溫度:-30°C ~ 80°C 封裝/外殼:SOT-665 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:SS迷你型-5D 安裝類型:表面貼裝 其它名稱:AN8955SSMTXLTR |
| LTC6902IMS#TR | 功能描述:IC OSC SILICON 20MHZ 10MSOP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 可編程計(jì)時(shí)器和振蕩器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:45 系列:- 類型:溫度 - 補(bǔ)償晶體振蕩器（TCXO） 計(jì)數(shù):- 頻率:25MHz 電源電壓:3.135 V ~ 3.465 V 電流 - 電源:1.5mA 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 包裝:管件 供應(yīng)商設(shè)備封裝:16-SOIC W 安裝類型:表面貼裝 |
| LTC6902IMS#TRPBF | 功能描述:IC OSC SILICON 20MHZ 10MSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 可編程計(jì)時(shí)器和振蕩器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:45 系列:- 類型:溫度 - 補(bǔ)償晶體振蕩器（TCXO） 計(jì)數(shù):- 頻率:25MHz 電源電壓:3.135 V ~ 3.465 V 電流 - 電源:1.5mA 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 包裝:管件 供應(yīng)商設(shè)備封裝:16-SOIC W 安裝類型:表面貼裝 |
| LTC6902IMSPBF | 制造商:Linear Technology 功能描述:Multiphase Oscillator with SSFM MSOP10 |
| LTC6903 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1kHz to 68MHz Serial Port Programmable Oscillator |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。