Sample & Support & Product Tools & Technical Community Buy Folder Documents Software INA219 SBOS448GAUGUST 2008REVISED DECEMBER 2015 2 INA219 Zer-Drift, Bidirectional Current/Power Monitor With I C Interface 1 Features 3 Description The INA219 is a current shunt and power monitor 1 Senses Bus Voltages from 0 to 26 V 2 with an I C- or SMBUS-compatible interface. The Reports Current, Voltage, and Power device monitors both shunt voltage drop and bus 16 Programmable Addresses supply voltage, with programmable conversion times and filtering. A programmable calibration value, High Accuracy: 0.5% (Maximum) Over combined with an internal multiplier, enables direct Temperature (INA219B) readouts of current in amperes. An additional Filtering Options multiplying register calculates power in watts. The 2 Calibration Registers I C- or SMBUS-compatible interface features 16 programmable addresses. SOT23-8 and SOIC-8 Packages The INA219 is available in two grades: A and B. The 2 Applications B grade version has higher accuracy and higher precision specifications. Servers Telecom Equipment The INA219 senses across shunts on buses that can vary from 0 to 26 V. The device uses a single 3- to Notebook Computers 5.5-V supply, drawing a maximum of 1 mA of supply Power Management current. The INA219 operates from 40C to 125C. Battery Chargers (1) Device Information Welding Equipment PART NUMBER PACKAGE BODY SIZE (NOM) Power Supplies SOIC (8) 3.91 mm 4.90 mm Test Equipment INA219 SOT-23 (8) 1.63 mm 2.90 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Schematic V S V V (Supply Voltage) IN+ IN- INA219 Power Register Data 2 CLK I C-/SMBUS- Current Register Compatible A0 Interface PGA ADC A1 Voltage Register GND 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.INA219 SBOS448GAUGUST 2008REVISED DECEMBER 2015 www.ti.com Table of Contents 8.3 Feature Description................................................... 9 1 Features.................................................................. 1 8.4 Device Functional Modes........................................ 11 2 Applications........................................................... 1 8.5 Programming........................................................... 12 3 Description............................................................. 1 8.6 Register Maps ........................................................ 18 4 Revision History..................................................... 2 9 Application and Implementation........................ 25 5 Related Products................................................... 3 9.1 Application Information............................................ 25 6 Pin Configuration and Functions......................... 3 9.2 Typical Application ................................................. 25 7 Specifications......................................................... 4 10 Power Supply Recommendations..................... 27 7.1 Absolute Maximum Ratings...................................... 4 11 Layout................................................................... 27 7.2 ESD Ratings.............................................................. 4 11.1 Layout Guidelines................................................. 27 7.3 Recommended Operating Conditions....................... 4 11.2 Layout Example.................................................... 27 7.4 Thermal Information.................................................. 4 12 Device and Documentation Support................. 28 7.5 Electrical Characteristics:.......................................... 5 12.1 Community Resources.......................................... 28 7.6 Bus Timing Diagram Definitions................................ 6 12.2 Trademarks........................................................... 28 7.7 Typical Characteristics.............................................. 7 12.3 Electrostatic Discharge Caution............................ 28 8 Detailed Description.............................................. 9 12.4 Glossary................................................................ 28 8.1 Overview................................................................... 9 13 Mechanical, Packaging, and Orderable 8.2 Functional Block Diagram......................................... 9 Information........................................................... 28 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision F (September 2011) to Revision G Page Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section ................................................................................................. 1 2 Updated Bus Timing Diagram Definitions table. I C timing table values were previously based on simulation and not characterized.......................................................................................................................................................................... 6 Changes from Revision E (September 2010) to Revision F Page Changed step 5 and step 6 values in Table 8...................................................................................................................... 26 Changes from Revision D (September 2010) to Revision E Page Updated Packaging Information table.................................................................................................................................... 3 2 Submit Documentation Feedback Copyright 20082015, Texas Instruments Incorporated Product Folder Links: INA219