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LMP8602Q

更新时间： 2024-11-21 02:58:27
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德州仪器 - TI /
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33页 1346K
描述
60V Common Mode, Fixed Gain, Bidirectional Precision Current Sensing Amplifier

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LMP8602Q 数据手册

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LMP8602, LMP8602Q, LMP8603, LMP8603Q  
www.ti.com  
SNOSB36D –JULY 2009–REVISED MARCH 2013  
60V Common Mode, Fixed Gain, Bidirectional Precision Current Sensing Amplifier  
Check for Samples: LMP8602, LMP8602Q, LMP8603, LMP8603Q  
1
FEATURES  
DESCRIPTION  
The LMP8602 and LMP8603 are fixed gain precision  
amplifiers. The parts will amplify and filter small  
differential signals in the presence of high common  
mode voltages. The input common mode voltage  
range is –22V to +60V when operating from a single  
5V supply. With a 3.3V supply, the input common  
mode voltage range is from –4V to +27V. The  
LMP8602 and LMP8603 are members of the Linear  
Monolithic Precision (LMP®) family and are ideal  
parts for unidirectional and bidirectional current  
sensing applications. All parameter values of the  
parts that are shown in the tables are 100% tested  
and all bold values are also 100% tested over  
temperature.  
2
•
Unless Otherwise Noted, Typical Values at TA  
= 25°C, VS = 5.0V, Gain = 50x (LMP8602), Gain  
= 100x (LMP8603)  
•
•
•
•
•
•
TCVos 10μV/°C max  
CMRR 90 dB Min  
Input Offset Voltage 1 mV Max  
CMVR at VS = 3.3V −4V to 27V  
CMVR at VS = 5.0V −22V to 60V  
Operating Ambient Temperature Range −40°C  
to 125°C  
•
•
•
Single Supply Bidirectional Operation  
All Min / Max Limits 100% Tested  
The parts have a precise gain of 50x for the  
LMP8602 and 100x for the LMP8603, which are  
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  
10x and an output stage buffer amplifier with a gain  
of 5x for the LMP8602 and 10x for the LMP8603. 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 the applications section.  
LMP8602Q and LMP8603Q Available in  
Automotive AEC-Q100 Grade 1 Qualified  
Version  
APPLICATIONS  
•
High Side and Low Side Driver Configuration  
Current Sensing  
•
•
•
•
•
•
Bidirectional Current Measurement  
Current Loop to Voltage Conversion  
Automotive Fuel Injection Control  
Transmission Control  
Power Steering  
Battery Management Systems  
Typical Applications  
D
S
I
I
L
Inductive  
Load  
C
load  
G
+5V  
48V  
48V  
I
B
+
-
+5V  
+3.3V  
+
-
+
-
Charger  
D
S
G
Inductive  
Load  
24V  
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.  
All trademarks are the property of their respective owners.  
2
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 © 2009–2013, Texas Instruments Incorporated  
1234567...33

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