INA225-Q1 Datasheet, PDF (1/33 Pages) Texas Instruments – High-Speed Current-Shunt Monitor

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INA225-Q1
SBOS728 – FEBRUARY 2015
INA225-Q1 Automotive-Grade, 36-V Programmable-Gain, Voltage-Output, Bidirectional,
Zero-Drift, High-Speed Current-Shunt Monitor
1 Features
•1 AEC-Q100 Qualified:
– Temperature Grade 1: –40°C to +125°C
– HBM ESD Classification 2
– CDM ESD Classification C4B
• 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
• Bandwidth: 250 kHz (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: VSSOP-8
2 Applications
• Automotive Lighting
• Body Control Module
• Motor Control
• Valve Control
• Cluster
• Central Control Module
3 Description
The INA225-Q1 is a voltage-output, current-sense
amplifier that senses drops across current-sensing
resistors at common-mode voltages that 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 of –40°C to
+125°C, and is offered in a VSSOP-8 package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA225-Q1
VSSOP (8)
3.00 mm x 3.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
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.