Sample & Support & Product Tools & Technical Community Buy Folder Documents Software INA225 SBOS612AFEBRUARY 2014REVISED MARCH 2014 INA225 36-V, Programmable-Gain, Voltage-Output, Bidirectional, Zero-Drift Series, Current-Shunt Monitor 1 Features 3 Description The INA225 is a voltage-output, current-sense 1 Wide Common-Mode Range: 0 V to 36 V amplifier that senses drops across current-sensing Offset Voltage: 150 V (Max, All Gains) resistors at common-mode voltages that can vary Offset Voltage Drift: 0.5 V/C (Max) from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, current-shunt monitor Gain Accuracy, Over Temperature (Max): that allows an external reference to be used to 25 V/V, 50 V/V: 0.15% measure current flowing in both directions across a 100 V/V: 0.2% current-sensing resistor. 200 V/V: 0.3% Four discrete gain levels are selectable using the two 10-ppm/C Gain Drift gain-select terminals (GS0 and GS1) to program gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The 250-kHz Bandwidth (Gain = 25 V/V) low-offset, zero-drift architecture and precision gain Programmable Gains: values enable current-sensing with maximum drops G1 = 25 V/V across the shunt as low as 10 mV of full-scale while G2 = 50 V/V maintaining very high accuracy measurements over the entire operating temperature range. G3 = 100 V/V The device operates from a single +2.7-V to +36-V G4 = 200 V/V power supply, drawing a maximum of 350 A of Quiescent Current: 350 A (Max) supply current. The device is specified over the Package: MSOP-8 extended operating temperature range (40C to +125C), and is offered in an MSOP-8 package. 2 Applications Device Information Power Supplies ORDER NUMBER PACKAGE BODY SIZE Motor Control INA225AIDGK MSOP (8) 3,0 mm x 3,0 mm Computers Telecom Equipment Power Management Test and Measurement R SHUNT 5-V Supply Load C BYPASS 0.1F VS INA225 IN- - OUT ADC Microcontroller + IN+ GPIO REF GAIN SELECT GS0 GS1 GAIN GND GND 25 GND VS 50 VS GND 100 VS VS 200 GS0 GS1 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.INA225 SBOS612AFEBRUARY 2014REVISED MARCH 2014 www.ti.com Table of Contents 7.3 Feature Description................................................. 13 1 Features.................................................................. 1 7.4 Device Functional Modes........................................ 16 2 Applications........................................................... 1 8 Applications and Implementation...................... 19 3 Description............................................................. 1 8.1 Application Information............................................ 19 4 Revision History..................................................... 2 8.2 Typical Applications................................................ 19 5 Terminal Configuration and Functions................ 3 9 Power Supply Recommendations...................... 25 6 Specifications......................................................... 4 10 Layout................................................................... 25 6.1 Absolute Maximum Ratings ..................................... 4 10.1 Layout Guidelines................................................. 25 6.2 Handling Ratings....................................................... 4 10.2 Layout Example.................................................... 25 6.3 Recommended Operating Conditions....................... 4 11 Device and Documentation Support................. 26 6.4 Thermal Information.................................................. 4 11.1 Related Documentation ....................................... 26 6.5 Electrical Characteristics........................................... 5 11.2 Trademarks........................................................... 26 6.6 Typical Characteristics.............................................. 7 11.3 Electrostatic Discharge Caution............................ 26 7 Detailed Description............................................ 13 11.4 Glossary................................................................ 26 7.1 Overview................................................................. 13 12 Mechanical, Packaging, and Orderable 7.2 Functional Block Diagram....................................... 13 Information........................................................... 26 4 Revision History Changes from Original (February 2014) to Revision A Page Made changes to product preview data sheet........................................................................................................................ 1 2 Submit Documentation Feedback Copyright 2014, Texas Instruments Incorporated Product Folder Links: INA225