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LMP8278Q-Q1 PDF预览

LMP8278Q-Q1

更新时间： 2024-11-24 01:00:27
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
23页 952K
描述
High Common Mode, 14 x Gain, Precision Current Sensing Amplifier

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LMP8278Q-Q1 数据手册

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LMP8278  
www.ti.com  
SNAS575A –FEBRUARY 2012–REVISED MARCH 2013  
LMP8278Q High Common Mode, 14 x Gain, Precision Current Sensing Amplifier  
Check for Samples: LMP8278  
1
FEATURES  
DESCRIPTION  
The LMP8278 is a fixed 14x gain precision current  
sense amplifier. The part amplifies and filters small  
differential signals in the presence of high common  
mode voltages. The part operates from a single 5V  
supply voltage. With an input common mode voltage  
range from -2V to +28V the gain is very precise  
(±0.5%). The part can handle common mode voltages  
in the range -2V to +40V with relaxed specifications.  
The LMP8278 is a member of the Linear Monolithic  
23  
•
TCVos ±15μV/°C Max  
CMRR 80 dB Min  
•
•
•
•
Input Offset Voltage ±2 mV max  
CMVR −2V to 40V  
Operating Ambient Temperature Range −40°C  
to 125°C  
•
•
Single Supply Operation  
Precision  
(
LMP™) family and is ideal for  
Min / Max Limits 100% Tested unless  
Otherwise Noted  
unidirectional current sensing applications. The  
parameter values that are shown in the Electrical  
Characteristics table are 100% tested and all bold  
values are also 100% tested over temperature,  
unless otherwise noted.  
•
LMP8278Q Available in Automotive AEC-Q100  
Grade 1 Qualified Version  
APPLICATIONS  
The part has a precise gain of 14x which is adequate  
in most targeted applications to drive an ADC to its  
full scale value. The fixed gain is achieved in two  
separate stages, a preamplifier with a gain of 7x and  
an output stage buffer amplifier with a gain of 2x. The  
connection between the two stages of the signal path  
is brought out on two pins to enable the possibility to  
create an additional filter network around the output  
buffer amplifier. These pins can also be used for  
alternative configurations with different gain as  
described in Application Information.  
•
High Side and Low Side Driver Configuration  
Current Sensing  
•
•
•
•
Automotive Fuel Injection Control  
Transmission Control  
Power Steering  
Battery Management Systems  
The  
LMP8278Q  
incorporates  
enhanced  
manufacturing and support processes for the  
automotive market, including defect detection  
methodologies. Reliability qualification is compliant  
with the requirements and temperature grades  
defined in the AEC Q100 standard.  
Typical Applications  
D
S
I
L
load  
G
Inductive  
Load  
28V  
+5V  
+5V  
28V  
+5V  
24V  
+
-
-
+
-
+
D
G
LMP8278  
LMP8278  
LMP8278  
Inductive  
Load  
S
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
LMP is a trademark of Texas Instruments.  
2
3
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2012–2013, Texas Instruments Incorporated  
1234567...23

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