参数资料
型号: LMH6643MMX/NOPB
厂商: National Semiconductor
文件页数: 13/33页
文件大小: 0K
描述: IC OP AMP R-R LP 3V 75MA 8-MSOP
标准包装: 3,500
系列: PowerWise®
放大器类型: 电压反馈
电路数: 2
输出类型: 满摆幅
转换速率: 135 V/µs
-3db带宽: 130MHz
电流 - 输入偏压: 1.6µA
电压 - 输入偏移: 1000µV
电流 - 电源: 2.7mA
电流 - 输出 / 通道: 75mA
电压 - 电源,单路/双路(±): 2.7 V ~ 12.8 V,±1.35 V ~ 6.4 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-MSOP
包装: 带卷 (TR)
其它名称: LMH6643MMX
LMH6643MMX-ND
LMH6643MMX/NOPBTR
SNOS966P – MAY 2001 – REVISED MARCH 2013
PRINTED CIRCUIT BOARD LAYOUT AND COMPONENT VALUES SECTION
Generally, a good high frequency layout will keep power supply and ground traces away from the inverting input
and output pins. Parasitic capacitances on these nodes to ground will cause frequency response peaking and
possible circuit oscillations (see Application Note OA-15 for more information). Texas Instruments suggests the
following evaluation boards as a guide for high frequency layout and as an aid in device testing and
characterization:
Device
Package
Evaluation Board PN
LMH6642MF
5-Pin SOT-23
LMH730216
LMH6642MA
8-Pin SOIC
LMH730227
LMH6643MA
8-Pin SOIC
LMH730036
LMH6643MM
8-Pin VSSOP
LMH730123
LMH6644MA
14-Pin SOIC
LMH730231
LMH6644MT
14-Pin TSSOP
LMH730131
Another important parameter in working with high speed/high performance amplifiers, is the component values
selection. Choosing external resistors that are large in value will effect the closed loop behavior of the stage
because of the interaction of these resistors with parasitic capacitances. These capacitors could be inherent to
the device or a by-product of the board layout and component placement. Either way, keeping the resistor values
lower, will diminish this interaction to a large extent. On the other hand, choosing very low value resistors could
load down nodes and will contribute to higher overall power dissipation.
20
Copyright 2001–2013, Texas Instruments Incorporated
Product Folder Links: LMH6642 LMH6643 LMH6644
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