- 您现在的位置：买卖IC网 > PDF目录358886 > LMX2315TM (NATIONAL SEMICONDUCTOR CORP) Frequency Synthesizer for RF Personal Communications PDF资料下载
参数资料
| 型号： | LMX2315TM |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | XO, clock |
| 英文描述： | Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20 |
| 封装： | 0.173 INCH, PLASTIC, TSSOP-20 |
| 文件页数： | 17/22页 |
| 文件大小： | 409K |
| 代理商： | LMX2315TM |
Application Information
(Continued)
Consider the following application examples:
Example
Y
1
K
VCO
e
20 MHz/V
K
w
e
5 mA (Note 1)
RF
opt
e
900 MHz
F
ref
e
200 kHz
N
e
RF
opt
/f
ref
e
4500
0
p
e
2
q
*
20 kHz
e
1.256e5
w
p
e
45
§
ATTEN
e
20 dB
T3
e
0
(2
q
#
200e3)
2
T1
e
sec
w
p
b
tan
w
p
0
p
e
3.29e
b
6
10
(20/20)
b
1
e
2.387e
b
6
0
c
e
(3.29e
b
6
a
2.387e
b
6)
[
(3.29e
b
6
a
2.387e
b
6)
2
a
3.29e
b
6
#
2.387e
b
6
]
#
D
0
1
a
(3.29e
b
6
a
2.387e
b
6)
2
a
3.29e
b
6
#
2.387e
b
6
[
(3.29e
b
6
a
2.387e
b
6)
]
2
b
1
(
e
7.045e4
T2
e
C2
e
1.085 nF
#
#
1
(7.045e4)
2
#
(3.29e
b
6
a
2.387e
b
6)
(5e
b
3)
#
20e6
e
3.549e
b
5
C1
e
3.29e
b
6
3.549e
b
5
e
1.085 nF
(7.045e4)
2
#
4500
#
D
[
1
a
(7.045e4)
2
#
(3.549e
b
5)
2
]
[
1
a
(7.045e4)
2
#
(3.29e
b
6)
2
] [
1
a
(7.045e4)
2
#
(2.387e
b
6)
2
]
(
(/2
3.55e
b
5
3.29e
b
6
b
1
J
e
10.6 nF;
R2
e
3.55e
b
5
10.6e
b
9
e
3.35 k
X
;
if we choose R3
e
22k; then C3
e
2.34e
b
6
22e3
e
106 pF.
Converting to standard component values gives the follow-
ing filter values, which are shown in Figure 4.
C1
e
1000 pF
R2
e
3.3 k
X
C2
e
10 nF
R3
e
22 k
X
C3
e
100 pF
Note 1:
See related equation for K
w
in Charge Pump Current Specification
Definitions. For this example V
P
e
5.0V. The value of K
w
can then
be approximated using the curves in the Typical Peformance Char-
acteristics for Charge Pump Current vs. D
o
Voltage. The units for
K
w
are in mA. You may also use K
w
e
(5 mA/2
q
rad), but in this
case you must convert K
VCO
to (rad/V) multiplying by 2
q
.
TL/W/12339–46
FIGURE 4.
E
20 kHz Loop Filter
http://www.national.com
17
相关PDF资料 |
PDF描述 |
|---|---|
| LMX2315TMX | Frequency Synthesizer for RF Personal Communications |
| LMX2316 | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316TMX | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316TM | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316SLBX | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2315TMX | 功能描述:IC FREQ SYNTH 2.5GHZ 20-TSSOP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:PLLatinum™ 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LMX2316 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316LBX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:FREQUENCY SYNTHESIZER|BICMOS|LLCC|16PIN|PLASTIC |
| LMX2316SLBX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316SLBX/NOPB | 功能描述:IC FREQ SYNTH 1.2GHZ 16LAMIN CSP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:PLLatinum™ 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
发布紧急采购，3分钟左右您将得到回复。