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LTC6905HS5#PBF

更新时间： 2024-01-23 01:55:03
品牌 Logo 应用领域
凌特 - Linear 振荡器
页数 文件大小 规格书
8页 120K
描述
LTC6905 - 17MHz to 170MHz Resistor Set SOT-23 Oscillator; Package: SOT; Pins: 5; Temperature Range: -40°C to 125°C

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中文翻译

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LTC6905HS5#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SOT包装说明：VSSOP, TSOP5/6,.11,37
针数：5Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.4模拟集成电路 - 其他类型：PLL FREQUENCY SYNTHESIZER
JESD-30 代码：R-PDSO-G5JESD-609代码：e3
长度：2.9 mm湿度敏感等级：1
功能数量：1端子数量：5
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：VSSOP
封装等效代码：TSOP5/6,.11,37封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
电源：3/5 V认证状态：Not Qualified
座面最大高度：1 mm子类别：Other Analog ICs
最大供电电流 (Isup)：20 mA最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：2.7 V标称供电电压 (Vsup)：3 V
表面贴装：YES技术：CMOS
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.95 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：1.625 mmBase Number Matches：1

LTC6905HS5#PBF 数据手册

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LTC6905  
W U U  
U
APPLICATIO S I FOR ATIO  
ALTERNATIVE METHODS OF SETTING THE OUTPUT  
FREQUENCY OF THE LTC6905  
Figure 3 shows a method to control the frequency of the  
LTC6905 using a current source. RSET, in this case, sets a  
maximum frequency according to the regular expression  
for fOSC. The current source will subtract current from the  
SET pin to lower the frequency.  
The LTC6905 may be programmed by any method that  
sources a current into the SET pin (Pin 3). The accuracy of  
the programming is best with a simple resistor because  
theLTC6905takesintoaccountboththevoltageattheSET  
pin and the current into the SET pin when generating the  
outputfrequency. SincethevoltageattheSETpincanvary  
by as much as 5%, setting the frequency using a current  
rather than a resistor will result in as much as 5% addi-  
tional inaccuracy in the output frequency.  
Figure 4 shows a method for controlling the frequency of  
theLTC6905usingavoltagesource.Inthiscase,RSET sets  
a constant current into the SET pin, and RCNTRL will sub-  
tract from this current in order to change the frequency.  
Increasing VCNTRL will increase the output frequency.  
+
⎡
⎢
⎢
⎢
⎢
⎤
⎥
⎥
⎥
⎥
⎡
⎢
⎣
⎤
⎥
⎦
V – VSET  
RSET  
168.5MHz •10kΩ •  
–ICNTRL  
+
1
N
V
fOSC  
=
+ 1.5MHz  
1
2
3
5
4
+
V+ – VSET  
V
OUT  
LTC6905  
0.1µF  
f
OSC  
69.8MHz TO 170MHz  
⎢
⎥
GND  
SET  
R
⎣
⎦
SET  
10k  
+
V
DIV  
ICNTRL Frequency ≤ 100kHz  
Example (Figure 3): VSET = (V+ – 1V), RSET = 10k, N = 1  
N = 1  
I
CNTRL  
0µA TO 60µA  
6905 F03  
fOSC = 168.5MHz • 1– 10kΩ •I  
+ 1.5MHz  
(
)
[
]
CNTRL  
Figure 3. Current Controlled Oscillator  
+
⎡
⎢
⎢
⎢
⎢
⎤
⎥
⎥
⎥
⎥
⎡
⎢
⎣
⎤
⎥
⎦
V – VSET  
RSET  
VSET – VCNTRL  
168.5MHz •10kΩ •  
–
RCNTRL  
1
N
fOSC  
=
+ 1.5MHz  
+
V
= 3V  
0.1µF  
V+ – VSET  
1
2
3
5
4
+
V
OUT  
⎢
⎥
LTC6905  
f
⎣
⎦
OSC  
69.8MHz TO 170MHz  
GND  
SET  
R
SET  
10k  
VCNTRL Frequency ≤ 100kHz  
Example (Figure 4): VSET = (V+ – 1V), RSET = 10k, RCNTRL = 33.2k,  
+
V
DIV  
N = 1  
R
CNTRL  
33.2k  
6905 F04  
N = 1, V+ = 3V  
V
CNTRL  
0V TO 2V  
+
–
⎡
⎤
1
2V – VCNTRL  
33.2kΩ  
⎡
⎤
f
OSC = 168.5MHz •10kΩ •  
–
+ 1.5MHz  
⎢
⎥
⎢
⎥
10kΩ  
Figure 4. Voltage Controlled Oscillator  
⎣
⎦
⎣
⎦
RELATED PARTS  
PART NUMBER  
LTC1799  
DESCRIPTION  
COMMENTS  
1kHz to 33MHz ThinSOT Oscillator  
1kHz to 20MHz ThinSOT Oscillator  
Single Output, High Frequency Operation  
Single Output Lower Power  
LTC6900  
LTC6902  
LTC6903/LTC6904  
Multiphase Oscillator with Spread Spectrum Modulation  
1kHz to 68MHz Serial Port Programmable Oscillator  
2-, 3- or 4-Phase Outputs  
3-Wire or I CTM Programmable  
2
LTC6905-XXX Series Fixed Frequency LTC6905  
High Accuracy, No External Resistor  
LTC6906  
Micropower, 10kHz to 1MHz Resistor Set ThinSOT Oscillator  
Ultralow Power, Resistor Sets Frequency  
2
I C is a trademark of Philips Electronics N.V.  
6905fa  
LT/TP 0205 1K REV A • PRINTED IN USA  
LinearTechnology Corporation  
1630 McCarthy Blvd., Milpitas, CA 95035-7417  
8
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com  
© LINEAR TECHNOLOGY CORPORATION 2005  
1...5678

中文翻译

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