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LM6172AMGWRLQV 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
运算放大器
封装:
CFP-16
描述:
双高速，低功耗，低失真，电压反馈型放大器 Dual High Speed, Low Power, Low Distortion, Voltage Feedback Amplifiers
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
典型应用电路图在P18
原理图在P2P14
封装尺寸在P20P21
标记信息在P20P21P22
封装信息在P20P21P22
技术参数、封装参数在P3
应用领域在P1P22P25
电气规格在P3P4P5P6P7P8P9P10P11P12P13
导航目录
LM6172AMGWRLQV数据手册
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若手册格式错乱，请下载阅览PDF原文件
LM6172QML
www.ti.com
SNOSAR4A –DECEMBER 2010–REVISED OCTOBER 2011
Figure 44. The LM6172 Driving a 510pF Load
with a 30Ω Isolation Resistor
Figure 45. The LM6172 Driving a 220 pF Load
with a 50Ω Isolation Resistor
LAYOUT CONSIDERATION
Printed Circuit Boards And High Speed Op Amps
There are many things to consider when designing PC boards for high speed op amps. Without proper caution, it
is very easy to have excessive ringing, oscillation and other degraded AC performance in high speed circuits. As
a rule, the signal traces should be short and wide to provide low inductance and low impedance paths. Any
unused board space needs to be grounded to reduce stray signal pickup. Critical components should also be
grounded at a common point to eliminate voltage drop. Sockets add capacitance to the board and can affect
frequency performance. It is better to solder the amplifier directly into the PC board without using any socket.
Using Probes
Active (FET) probes are ideal for taking high frequency measurements because they have wide bandwidth, high
input impedance and low input capacitance. However, the probe ground leads provide a long ground loop that
will produce errors in measurement. Instead, the probes can be grounded directly by removing the ground leads
and probe jackets and using scope probe jacks.
Components Selection And Feedback Resistor
It is important in high speed applications to keep all component leads short because wires are inductive at high
frequency. For discrete components, choose carbon composition-type resistors and mica-type capacitors.
Surface mount components are preferred over discrete components for minimum inductive effect.
Large values of feedback resistors can couple with parasitic capacitance and cause undesirable effects such as
ringing or oscillation in high speed amplifiers. For LM6172, a feedback resistor less than 1kΩ gives optimal
performance.
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