INA220-Q1 Datasheet, PDF (1/38 Pages) Texas Instruments – Automotive Grade, 26-V, Bi-Directional, Zero-Drift, Low- or High-Side, I2C-Compatible Current/Power Monitor

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INA220-Q1
SLOS785B – JUNE 2012 – REVISED MARCH 2016
INA220-Q1 Automotive Grade, 26-V, Bi-Directional, Zero-Drift,
Low- or High-Side, I²C-Compatible Current/Power Monitor
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified with the following results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• High- or Low-Side Sensing
• Senses Bus Voltages from 0 V to 26 V
• Reports Current, Voltage, and Power
• 16 Programmable Addresses
• High Accuracy: 0.5% (Maximum) Over
Temperature
• User-Programmable Calibration
• Fast (2.56-MHz) I²C- or SMBUS-Compatible
Interface
• VSSOP-10 Package
2 Applications
• Electric Power Steering (EPS) Systems
• Body Control Modules
• Brake Systems
• Electronic Stability Control (ESC) Systems
3 Description
The INA220-Q1 device is a current shunt and power
monitor with an I²C- or SMBUS-compatible interface.
The INA220-Q1 device monitors both shunt drop and
supply voltage. A programmable calibration value,
combined with an internal multiplier, enables direct
readouts in amperes. An additional multiplying
register calculates power in watts. The I²C- or
SMBUS-compatible interface features 16
programmable addresses. The separate shunt input
on the INA220-Q1 device allows it to be used in
systems with low-side sensing.
The INA220-Q1 device senses across shunts on
buses that can vary from 0 to 26 V, useful for low-
side sensing or CPU power supplies. The device
uses a single 3- to 5.5-V supply, drawing a maximum
of 1 mA of supply current. The INA220-Q1 device
operates from –40°C to +125°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA220-Q1
VSSOP (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Supply (0 to 26 V)
General Load, Low- or High-Side Sensing
C_BYPASS
0.1 µF
3.3 V to
5V
High-
Side
Shunt
Bus Voltage Input
V_S (Supply Voltage)
INA220-Q1
Load
Low-
Side
Shunt
R2_F
R1_F C_F
V_IN+
V
I
V_IN-
GND
ADC
x
Power Register
Current Register
Voltage Register
I²C-/SMBUS-
Compatible
Interface
SDA
SCL
A0
A1
DATA
CLK
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.