INA181 Datasheet, PDF (1/32 Pages) Texas Instruments – Bidirectional, Low- and High-Side Voltage Output, Current-Sense Amplifier

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INA181 Bidirectional, Low- and High-Side Voltage Output,
Current-Sense Amplifier
INA181
SBOS793 – APRIL 2017
1 Features
•1 Common-Mode Range (V_CM): –0.2 V to +26 V
• High Bandwidth: 350 kHz
• Offset Voltage:
– ±150 µV (Max) at V_CM = 0 V
– ±500 µV (Max) at V_CM = 12 V
• Output Slew Rate: 2 V/µs
• Bidirectional Current-Sensing Capability
• Accuracy:
– ±1% Gain Error (Max)
– 1-µV/°C Offset Drift (Max)
• Gain Options:
– 20 V/V (A1 Devices)
– 50 V/V (A2 Devices)
– 100 V/V (A3 Devices)
– 200 V/V (A4 Devices)
• Quiescent Current: 260 µA (Max per Channel)
2 Applications
• Motor Control
• Battery Monitoring
• Power Management
• Lighting Control
• Overcurrent Detection
3 Description
The INA181 is a family of cost-optimized,
bidirectional, current-sense amplifiers (also called
current-shunt monitors) that sense voltage drops
across current-sense resistors at common-mode
voltages from –0.2 V to +26 V, independent of the
supply voltage. The INA181 integrates a matched
resistor gain network in four, fixed-gain device
options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This
matched gain resistor network minimizes gain error
and reduces the temperature drift.
The INA181 operates from a single 2.7-V to 5.5-V
power supply, drawing a maximum of 260 µA of
supply current.
All device options are specified over the extended
operating temperature range of –40°C to +125°C, and
are available in a 6-pin, SOT-23 package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA181
SOT-23 (6)
2.90 mm × 1.60 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
Bus Voltage, VCM
Up To 26 V
RSENSE
Load
Power Supply, VS
2.7 V to 5.5 V _CBYPASS
0.1 µF
INA181
IN±
IN+
VS
Microcontroller
±
OUT
ADC
+
REF
GND
Copyright © 2017, Texas Instruments Incorporated
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.