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LTC6905HS5-133#TRM PDF预览

LTC6905HS5-133#TRM

更新时间: 2024-01-07 15:24:29
品牌 Logo 应用领域
凌特 - Linear 机械振荡器
页数 文件大小 规格书
12页 161K
描述
LTC6905-XXX - Fixed Frequency SOT-23 Oscillator; Package: SOT; Pins: 5; Temperature Range: -40°C to 125°C

LTC6905HS5-133#TRM 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:SOT包装说明:PLASTIC, SOT-23, 5 PIN
针数:5Reach Compliance Code:not_compliant
ECCN代码:EAR99风险等级:5.33
其他特性:TAPE AND REEL最长下降时间:0.5 ns
频率调整-机械:NO频率稳定性:20%
JESD-609代码:e0安装特点:SURFACE MOUNT
标称工作频率:133 MHz最高工作温度:125 °C
最低工作温度:-40 °C振荡器类型:CMOS
输出负载:5 pF物理尺寸:2.9mm x 1.75mm x 1.0mm
最长上升时间:0.5 ns最大供电电压:5.5 V
最小供电电压:2.7 V表面贴装:YES
最大对称度:52.5/47.5 %端子面层:Tin/Lead (Sn/Pb)
Base Number Matches:1

LTC6905HS5-133#TRM 数据手册

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LTC6905  
THEORY OF OPERATION  
As shown in the Block Diagram, the LTC6905’s master  
highestfrequencyrange,withthemasteroutputfrequency  
passeddirectlytoOUT.TheDIVpinmaybeoatedordriven  
to midsupply to select ÷2, the intermediate frequency  
range. The lowest frequency range, ÷4, is selected by  
tying DIV to GND or driving it below 0.5V. Figure 1 shows  
oscillator is controlled by the ratio of the voltage between  
+
the V and SET pins and the current entering the SET pin  
(I ). The voltage on the SET pin is forced to approxi-  
RES  
+
mately 1V below V by the PMOS transistor and its gate  
bias voltage.  
the relationship between R , divider setting and output  
SET  
frequency, including the overlapping frequencies.  
+
A resistor R , connected between the V and SET pins,  
SET  
+
30  
“locks together” the voltage (V – V ) and current, I  
,
SET  
RES  
variation. This provides the LTC6905’s high precision. The  
25  
master oscillation frequency reduces to:  
÷4 ÷2  
÷1  
20  
15  
10  
5
168.5MHz 10kΩ  
fMO  
=
+ 1.5MHz  
RSET  
Toextendtheoutputfrequencyrange,themasteroscillator  
signal is divided by 1, 2 or 4 before driving OUT (Pin 5).  
The LTC6905 is optimized for use with resistors between  
10k and 25k, corresponding to oscillator frequencies  
between 17.225MHz and 170MHz. The divide-by value is  
determined by the state of the DIV input (Pin 4). Tie DIV to  
10  
60  
110  
OUTPUT FREQUENCY (MHz)  
160  
6905 F01  
+
+
Figure 1. RSET vs Output Frequency  
V or drive it to within 0.4V of V to select ÷1. This is the  
6905fd  
7

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