INA225_15 Datasheet, PDF (1/33 Pages) Texas Instruments – 36-V, Programmable-Gain, Voltage-Output, Bidirectional, Zero-Drift Series,Current-Shunt Monitor

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INA225
SBOS612A – FEBRUARY 2014 – REVISED MARCH 2014
INA225 36-V, Programmable-Gain, Voltage-Output, Bidirectional, Zero-Drift Series,
Current-Shunt Monitor
1 Features
•1 Wide Common-Mode Range: 0 V to 36 V
• Offset Voltage: ±150 μV (Max, All Gains)
• Offset Voltage Drift: 0.5 μV/°C (Max)
• Gain Accuracy, Over Temperature (Max):
– 25 V/V, 50 V/V: ±0.15%
– 100 V/V: ±0.2%
– 200 V/V: ±0.3%
– 10-ppm/°C Gain Drift
• 250-kHz Bandwidth (Gain = 25 V/V)
• Programmable Gains:
– G1 = 25 V/V
– G2 = 50 V/V
– G3 = 100 V/V
– G4 = 200 V/V
• Quiescent Current: 350 μA (Max)
• Package: MSOP-8
2 Applications
• Power Supplies
• Motor Control
• Computers
• Telecom Equipment
• Power Management
• Test and Measurement
3 Description
The INA225 is a voltage-output, current-sense
amplifier that senses drops across current-sensing
resistors at common-mode voltages that can vary
from 0 V to 36 V, independent of the supply voltage.
The device is a bidirectional, current-shunt monitor
that allows an external reference to be used to
measure current flowing in both directions across a
current-sensing resistor.
Four discrete gain levels are selectable using the two
gain-select terminals (GS0 and GS1) to program
gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The
low-offset, zero-drift architecture and precision gain
values enable current-sensing with maximum drops
across the shunt as low as 10 mV of full-scale while
maintaining very high accuracy measurements over
the entire operating temperature range.
The device operates from a single +2.7-V to +36-V
power supply, drawing a maximum of 350 μA of
supply current. The device is specified over the
extended operating temperature range (–40°C to
+125°C), and is offered in an MSOP-8 package.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
INA225AIDGK
MSOP (8)
3,0 mm x 3,0 mm
RSHUNT
Load
5-V Supply
INA225
IN-
-
+
IN+
VS
OUT
GAIN SELECT
GS0 GS1
GND
GND
VS
VS
GND
VS
GND
VS
GAIN
25
50
100
200
GS0
GS1
REF
GND
CBYPASS
0.1µ F
ADC
Microcontroller
GPIO
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.