26-V, Bi-Directional, Zero-Drift, Low- or High-Side, I2C Out Current/Power Monitor - INA220

INA220 (ACTIVE)

26-V, Bi-Directional, Zero-Drift, Low- or High-Side, I2C Out Current/Power Monitor

 

Description

The INA220 is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The INA220 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 allows it to be used in systems with low-side sensing.

The INA220 is available in two grades: A and B. The B grade version has higher accuracy and higher precision specifications.

The INA220 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 operates from –40°C to 125°C.

Features

  • 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 (INA220B)
  • User-Programmable Calibration
  • Fast (2.56-MHz) I2C- or SMBUS-Compatible
    Interface
  • VSSOP-10 Package
  • APPLICATIONS
    • Servers
    • Telecom Equipment
    • Notebook Computers
    • Power Management
    • Battery Chargers
    • Automotive
    • Power Supplies
    • Test Equipment

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Parametrics Compare all products in Current Sense Power / Current Monitors

 
Common Mode Voltage (Max) (V)
Input Offset (+/-) (Max) (uV)
Input Offset Drift (+/-) (Typ) (uV/C)
Gain (V/V)
Gain Error (%)
CMRR (Min) (dB)
Bandwidth (kHz)
Supply Voltage (Max) (V)
Supply Voltage (Min) (V)
Iq (Max) (mA)
Special Features
Digital Interface
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Common Mode Voltage (Min) (V)
Gain Error Drift (Max) (ppm/°C)
PSRR (Typ) (uV/V)
Specified Common Mode Voltage (V)
Specified Power Supply Voltage (V)
INA220 INA219 INA220-Q1
26    26    26   
50    50    50   
0.16    0.1    0.16   
1
0.5
0.25
0.125   
1
0.5
0.25
0.125   
1
0.5
0.25
0.125   
0.5    0.5    0.5   
120    120    120   
5.5    5.5    5.5   
5.5    5.5    5.5   
3    3    3   
1    1    1   
Bi-directional
I2C
Low-side Capable
Programmable Gain   
Bi-directional
I2C
Programmable Gain   
Bi-directional
I2C
Low-side Capable
Programmable Gain   
I2C    I2C    I2C   
Catalog    Catalog    Automotive   
-40 to 125    -40 to 125
to   
-40 to 125   
VSSOP    SOIC
SOT-23   
VSSOP   
10VSSOP: 15 mm2: 4.9 x 3(VSSOP)    8SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)
8SOIC: 29 mm2: 6 x 4.9(SOIC)   
10VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
0    0    0   
83    83    33   
10    10    10   
12    12    12   
3.3    3.3    3.3   

Other qualified versions of INA220

Version Part Number Definition
Automotive INA220-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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INA220 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
3 ≤ 
V ≤ 5.5
0 ≤ 
V ≤ 26
-40 ≤ 
C ≤ 125