Datasheet 搜索 > 微控制器 > ST Microelectronics（意法半导体） > STM32L151R8H6ATR 数据手册 > STM32L151R8H6ATR 产品设计参考手册 6/43 页
器件3D模型￥ 12.307
STM32L151R8H6ATR 产品设计参考手册 - ST Microelectronics（意法半导体）
制造商:
ST Microelectronics（意法半导体）
分类:
微控制器
封装:
TFBGA-64
描述:
ARM Cortex-M3 32MHz 闪存：64K@x8bit RAM：32KB
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
原理图在P10
焊接温度在P37
型号编号列表在P30
导航目录
STM32L151R8H6ATR数据手册
Page:
of 43 Go
若手册格式错乱，请下载阅览PDF原文件
Quartz crystal properties and model AN2867
6/43 DocID15287 Rev 11
1 Quartz crystal properties and model
A quartz crystal is a piezoelectric device transforming electric energy into mechanical
energy and vice versa. The transformation occurs at the resonant frequency. The quartz
crystal can be modeled as shown in Figure 1.
Figure 1. Quartz crystal model
• C
0
: represents the shunt capacitance resulting from the capacitor formed by the
electrodes
• L
m
: (motional inductance) represents the vibrating mass of the crystal
• C
m
: (motional capacitance) represents the elasticity of the crystal
• R
m
: (motional resistance) represents the circuit losses
The impedance of the crystal is given by the following equation (assuming that R
m
is
negligible):
(1)
Z
j
w
----
w
2
L
m
× C
m
× 1–
C
0
C
m
+()w
2
L
m
× C
m
× C
0
×–
------------------------------------------------------------------------------------------
×=
Figure 2 represents the impedance in the frequency domain.
Figure 2. Impedance representation in the frequency domain
069
4
&
5
P
&
P
/
P
)
V
)
D
,PSHGDQFH
,QGXFWLYHEHKDYLRU
WKHTXDUW]RVFLOODWHV
$UHDRISDUDOOHO
UHVRQDQFH)S
&DSDFLWLYHEHKDYLRU
QRRVFLOODWLRQ
3KDVHGHJ
)UHTXHQF\
)UHTXHQF\
±
DLE
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
