INA250A1_15 Datasheet, PDF (1/33 Pages) Texas Instruments – INA250 36-V, Low- or High-Side, Bidirectional, Zero-DriftCurrent-Shunt Monitor with Precision Integrated Shunt Resistor

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INA250A1, INA250A2, INA250A3, INA250A4
SBOS511B – APRIL 2015 – REVISED DECEMBER 2015
INA250 36-V, Low- or High-Side, Bidirectional, Zero-Drift
Current-Shunt Monitor with Precision Integrated Shunt Resistor
1 Features
•1 Precision Integrated Shunt Resistor:
– Shunt Resistor: 2 mΩ
– Shunt Resistor Tolerance: 0.1% (Max)
– 15 A Continuous from –40°C to 85°C
– 0°C to 125°C Temperature Coefficient:
10 ppm/°C
• High Accuracy:
– Gain Error (Shunt and Amplifier): 0.3% (Max)
– Offset Current: 50 mA (Max, INA250A2)
• Four Available Gains:
– INA250A1: 200 mV/A
– INA250A2: 500 mV/A
– INA250A3: 800 mV/A
– INA250A4: 2 V/A
• Wide Common-Mode Range: –0.1 V to 36 V
• Specified Operating Temperature: –40°C to 125°C
2 Applications
• Test Equipment
• Power Supplies
• Servers
• Telecom Equipment
• Automotive
• Solar Inverters
• Power Management
3 Description
The INA250 is a voltage-output, current-sensing
amplifier family that integrates an internal shunt
resistor to enable high-accuracy current
measurements at common-mode voltages that can
vary from 0 V to 36 V, independent of the supply
voltage. The device is a bidirectional, low- or high-
side current-shunt monitor that allows an external
reference to be used to measure current flowing in
both directions through the internal current-sensing
resistor sensor. The integration of the precision
current-sensing resistor provides calibration
equivalent measurement accuracy with ultra-low
temperature drift performance and ensures an
optimized Kelvin layout for the sensing resistor is
always obtained.
The INA250 family is available in four output voltage
scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
This device is fully tested and specified for
continuous currents up to 10 amps at the maximum
temperature of 125°C. The INA250 operates from a
single 2.7-V to 36-V supply and draws a maximum of
300 µA of supply current. All INA250 gain versions
are specified over the extended operating
temperature range (–40°C to 125°C), and are
available in a TSSOP-16 package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA250A1
INA250A2
INA250A3
TSSOP (16)
5.00 mm × 4.40 mm
INA250A4
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Power Rail
(0 V to 36 V)
Simplified Schematic
Device Supply
(2.7 V to 36 V)
CBYPASS
0.1 PF
IN+
SH+
VIN+
VS
REF
OUT
IN
SH
VIN
Load
GND
ADC
Microcontroller
ADC
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.