VS = 5V 1V/DIV 12.5ns/DIV 69012 G06 1" />
參數(shù)資料
型號(hào): LTC6902CMS#PBF
廠商: Linear Technology
文件頁(yè)數(shù): 12/16頁(yè)
文件大?。?/td> 0K
描述: IC OSC SILICON 20MHZ 10MSOP
產(chǎn)品目錄繪圖: LTC6902CMS#PBF Top
標(biāo)準(zhǔn)包裝: 50
類型: 振蕩器 - 硅
頻率: 100kHz ~ 20MHz
電源電壓: 2.7 V ~ 5.5 V
電流 - 電源: 2.5mA
工作溫度: -40°C ~ 85°C
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
包裝: 管件
供應(yīng)商設(shè)備封裝: 10-MSOP
安裝類型: 表面貼裝
產(chǎn)品目錄頁(yè)面: 1715 (CN2011-ZH PDF)
LTC6902
5
6902f
Output Operating at 20MHz,
VS = 5V
1V/DIV
12.5ns/DIV
69012 G06
1V/DIV
25ns/DIV
69012 G07
V+ = 5V, RSET = 10k, CL = 10pF
V+ = 3V, RSET = 20k, CL = 10pF
Output Operating at 10MHz,
VS = 3V
0V
TYPICAL PERFOR A CE CHARACTERISTICS
UW
QUICK DESIG GUIDE
U
Step 1. Select Multiphase Mode, Setting M
By selecting the multiphase mode, a division parameter M
is also chosen:
2-Phase: Connect PH Pin to GND
M = 1
3-Phase: Leave PH Open
M = 3
4-Phase: Connect PH Pin to V+
M = 4
Step 2. Choosing Programmable Divider Setting N
A. For applications using spread spectrum frequency
modulation (SSFM) or applications that are constant fre-
quency where low clock jitter is the primary specification:
DIVIDER SETTING
FREQUENCY RANGE (fOUT M)
N = 1
Connect DIV Pin to GND
2MHz to 20MHz
N = 10
Leave DIV Open
200kHz to 2MHz
N = 100
Connect DIV Pin to V+
< 200kHz
Note: The frequency range numbers are for a 5V supply where a 20MHz
output is the maximum frequency supported. For low supply applications
(2.7V
≤ V+ ≤ 4V), the maximum rated output frequency is 10MHz and all
of the above numbers should be halved.
B. For constant frequency applications where frequency
accuracy is the primary specification:
DIVIDER SETTING
FREQUENCY RANGE (fOUT M)
N = 1
Connect DIV Pin to GND
> 500kHz*
N = 10
Leave DIV Open
50kHz to 500kHz
N = 100
Connect DIV Pin to V+
< 50kHz
*The maximum frequency (fOUT M) is 20MHz for 5V applications and is
10MHz for low supply applications (2.7V
≤ V+ ≤ 4V).
f
MHz
NM
k
R
kHz
f
MHz
Spreading Percentage
R
OUT
SET
OUT
SET
MOD
=
≤≤
=
10
20
520
20
;
V+
DIV
PH
OUT1
OUT2
OUT4
OUT3
OUT2
OUT1
SET
MOD
GND
OUT4
OUT3
LTC6902
RSET
RMOD
V+
DIV
PH
6902 F01
0.1
F
Figure 1. Typical Application with Design Equation
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