Texas Instruments Evaluation Board for the LMP8602 LMP8602MAEVAL/NOPB LMP8602MAEVAL/NOPB 数据表
产品代码
LMP8602MAEVAL/NOPB
User's Guide
SNOA545C – April 2009 – Revised April 2013
AN-1958 LMP860x SOIC Evaluation Board
1
Introduction
The LMP860x SOIC Evaluation Board,
, is designed to evaluate current sense amplifiers like the
LMP8601, LMP8602, and LMP8603. These all are 60V Common Mode, Bidirectional Precision Current
Sensing amplifier with different gain. This board has a LMP860X part mounted on the PCB together with
the required de-coupling capacitor, power supply connections, Input and Output connectors and a 3 pin
header for connecting the offset pin to either GND or V
Sensing amplifier with different gain. This board has a LMP860X part mounted on the PCB together with
the required de-coupling capacitor, power supply connections, Input and Output connectors and a 3 pin
header for connecting the offset pin to either GND or V
S
.
2
General Description
The LMP860x and LMP860xQ are fixed gain precision amplifiers. The part amplifies and filters small
differential signals in the presence of high common mode voltages. The input common mode voltage
range is
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 3.3V supply, the input common
mode voltage range is from
−
4V to +27V. The LMP860x and LMP860xQ are members of the Linear
Monolitic Precision ( LMP™) family and are ideal parts for unidirectional and bidirectional current sensing
applications.
applications.
The parts have a precise gain (LMP8601 20x, LMP8602 50x, LMP8603 100x) that 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 10x and an output stage buffer amplifier with a gain of 2x, 5x, 10x.
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 information section
of the data sheet (
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 2x, 5x, 10x.
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 information section
of the data sheet (
or
).
The mid-rail offset adjustment pin enables the user to use these devices for bidirectional single supply
voltage current sensing. The output signal is bidirectional and mid-rail referenced when this pin is
connected to the positive supply rail. With the offset pin connected to ground, the output signal is
unidirectional and ground-referenced.
voltage current sensing. The output signal is bidirectional and mid-rail referenced when this pin is
connected to the positive supply rail. With the offset pin connected to ground, the output signal is
unidirectional and ground-referenced.
The LMP860xQ 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.
including defect detection methodologies. Reliability qualification is compliant with the requirements and
temperature grades defined in the AEC Q100 standard.
3
LMP860x Operating Conditions
•
Temperature Range
−
40°C to 125°C
•
Power Supply Voltage 3.0V
≤
V
S
≤
5.5V
•
CMVR at V
S
= 3.3V
−
4V to 27V
•
CMVR at V
S
= 5.0V
−
22V to 60V
LMP is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
All other trademarks are the property of their respective owners.
1
SNOA545C – April 2009 – Revised April 2013
AN-1958 LMP860x SOIC Evaluation Board
Copyright © 2009–2013, Texas Instruments Incorporated