LMP8601 Datasheet, PDF (1/42 Pages) National Semiconductor (TI) – 60V Common Mode, Bidirectional Precision Current Sensing Amplifier

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LMP8601, LMP8601-Q1
LMP8602, LMP8602-Q1
LMP8603, LMP8603-Q1
SNOSAR2H – SEPTEMBER 2008 – REVISED APRIL 2016
LMP860x, LMP860x-Q1 60-V, Bidirectional, Low- or High-Side, Voltage-Output,
Current-Sensing Amplifiers
1 Features
•1 Gain = 20x for LMP8601 and LMP8601-Q1
• Gain = 50x for LMP8602 and LMP8602-Q1
• Gain = 100x for LMP8603 and LMP8603-Q1
• TCV_OS: 10 μV/°C Maximum
• CMRR: 90-dB Minimum
• Input Offset Voltage: 1-mV Maximum
• CMVR at V_S = 3.3 V: –4 V to 27 V
• CMVR at V_S = 5 V: –22 V to 60 V
• Single-Supply Bidirectional Operation
• All Minimum and Maximum Limits 100% Tested
• Q1 Devices Qualified for Automotive Applications
• Q1 Devices ACE-Q100 Qualified With the
Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device Temperature Grade 0: –40°C to 150°C
(LMP8601EDRQ1 Only)
– Device HBM ESD Classification Level 2
(3A on inputs)
– Device CDM ESD Classification Level C6
– Device MM ESD Classification Level M2
2 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
3 Description
The LMP8601, LMP8602, LMP8603 (LMP860x) and
LMP8601-Q1,
LMP8602-Q1,
LMP8603-Q1
(LMP860x-Q1) devices are fixed-gain, precision
current-sense amplifiers (also referred to as current-
shunt monitors). The input common-mode voltage
range is –22 V to +60 V when operating from a single
5-V supply, or –4 V to +27 V with a 3.3-V supply. The
LMP860x and LMP860x-Q1 are ideal parts for
unidirectional and bidirectional current sensing
applications.
These devices have a precise gain of 20x (LPM8601,
LPM8601-Q1), 50x (LPM8602, LPM8602-Q1), and
100x (LPM8603, LPM8603-Q1), and are adequate in
most targeted applications to drive an ADC to 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
(LMP8601, LMP8601-Q1), 5x (LMP8602, LMP8602-
Q1), or 10x (LMP8603, LMP8603-Q1). The path
between the two stages is brought out on two pins to
enable the option of an additional filter network or
modifying the gain.
The offset input pin enables these devices for
unidirectional or bidirectional single supply voltage
current sensing.
The LMP860x-Q1 devices incorporate enhanced
manufacturing and support processes for the
automotive market and are compliant with the AEC-
Q100 standard.
Device Information⁽¹⁾
PART NUMBER
PACKAGE BODY SIZE (NOM)
LMP860x
LMP860x-Q1
SOIC (8) 4.90 mm x 3.91 mm
LMP8602, LMP8603
VSSOP (8) 3.00 mm × 3.00 mm
LMP8602-Q1, LMP8603-Q1
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Typical Applications
D
Inductive
48V
Load
+5V
G
48V
+
S
+5V
-
+
D
-
G
Inductive
S
Load
I_C
Charger
I_L
load
I_B
+3.3V
+
-
24V
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.