LMP8601_15 Datasheet, PDF (1/33 Pages) Texas Instruments – LMP8601, LMP8601-Q1 60-V Common-Mode Bidirectional Precision Current-Sensing Amplifier

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LMP8601, LMP8601-Q1
SNOSAR2G – SEPTEMBER 2008 – REVISED JULY 2015
LMP8601, LMP8601-Q1 60-V Common-Mode Bidirectional Precision Current-Sensing
Amplifier
1 Features
•1 Unless Otherwise Noted, Typical Values at T_A =
25°C, V_S = 5.0 V, Gain = 20x
– 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
– Operating Ambient Temperature Range –40°C
to 125°C
– Single-Supply Bidirectional Operation
– All Minimum and Maximum Limits 100%
Tested
– LMP8601-Q1 is Qualified for Automotive
Applications:
– Device Temperature AEC-Q100 Grade 1:
–40°C to 125°C Operating Range
– 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 and LMP8601-Q1 devices are fixed
20x gain precision amplifiers that will amplify and filter
small differential signals in the presence of high
common-mode voltages. 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 LMP8601 and LMP8601-Q1 are ideal
parts for unidirectional and bidirectional current
sensing applications.
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. 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 the user to use these
devices for unidirectional or bidirectional single supply
voltage current sensing.
The LMP8601-Q1 incorporates enhanced
manufacturing and support processes for the
automotive market and is compliant with the AEC
Q100 standard.
If higher gain is required, the LMP8602 is available
with a gain of 50, or the LMP8603 with a gain of 100.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMP8601
LMP8601-Q1
SOIC (8)
4.90 mm x 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Applications
Inductive
D
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.