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参数资料
| 型号： | LTC6905IS5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC OSC SILICON 170MHZ TSOT23-5 |
| 标准包装： | 2,500 |
| 类型： | 振荡器 - 硅 |
| 频率： | 17MHz ~ 170MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 电流 - 电源： | 14mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-5 |
| 安装类型： | 表面贴装 |
LTC6905
7
6905fd
THEORY OF OPERATION
As shown in the Block Diagram, the LTC6905’s master
oscillator is controlled by the ratio of the voltage between
the V+ and SET pins and the current entering the SET pin
(IRES). The voltage on the SET pin is forced to approxi-
mately 1V below V+ by the PMOS transistor and its gate
bias voltage.
A resistor RSET, connected between the V+ and SET pins,
“locks together” the voltage (V+ – VSET) and current, IRES,
variation. This provides the LTC6905’s high precision. The
master oscillation frequency reduces to:
f
MHz
k
R
MHz
MO
SET
=
Ω
+
168 5
10
15
.
To extend the output frequency range, the master oscillator
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
V+ or drive it to within 0.4V of V+ to select ÷1. This is the
highest frequency range, with the master output frequency
passed directly to OUT. The DIV pin may be oated or driven
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
the relationship between RSET, divider setting and output
frequency, including the overlapping frequencies.
OUTPUT FREQUENCY (MHz)
10
R
SET
(Ω)
15
20
÷4 ÷2
÷1
6905 F01
10
5
60
110
160
30
25
Figure 1. RSET vs Output Frequency
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6905MPS5#TRMPBF | 功能描述:IC OSC SILICON 170MHZ TSOT23-5 RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 可编程计时器和振荡器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:45 系列:- 类型:温度 - 补偿晶体振荡器（TCXO） 计数:- 频率:25MHz 电源电压:3.135 V ~ 3.465 V 电流 - 电源:1.5mA 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 包装:管件 供应商设备封装:16-SOIC W 安装类型:表面贴装 |
| LTC6905MPS5#TRPBF | 功能描述:IC OSC SILICON 170MHZ TSOT23-5 RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 可编程计时器和振荡器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:45 系列:- 类型:温度 - 补偿晶体振荡器（TCXO） 计数:- 频率:25MHz 电源电压:3.135 V ~ 3.465 V 电流 - 电源:1.5mA 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 包装:管件 供应商设备封装:16-SOIC W 安装类型:表面贴装 |
| LTC6905-XXX | 制造商:LINER 制造商全称:Linear Technology 功能描述:Fixed Frequency SOT-23 Oscillator |
| LTC6906 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| LTC6906CS6 | 制造商:Linear Technology 功能描述:MICROPOWER, 10KHZ TO 1MHZRESISTOR SET OSCILLATORIN SOT-23 |
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