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Product details

Parameters

Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 100 Input offset drift (+/-) (Typ) (uV/C) 0.1 Gain (V/V) 1, 0.5, 0.25, 0.125 Gain error (%) 0.5 Gain error drift (+/-) (Max) (ppm/°C) 83 CMRR (Min) (dB) 120 Bandwidth (kHz) 5.5 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 3 Iq (Max) (mA) 1.5 Digital interface I2C, SMBus Features Alert Function, Bi-directional, Low-side Capable, Programmable Gain Resolution (Bits) 12 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Current/voltage/power monitors

Package | Pins | Size

TSSOP (PW) 16 22 mm² 4.4 x 5 open-in-new Find other Current/voltage/power monitors

Features

  • SENSES BUS VOLTAGES FROM 0V TO +26V
  • REPORTS CURRENT, VOLTAGE, AND POWER; STORES PEAKS
  • TRIPLE WATCHDOG LIMITS:
    • Lower Warning with Delay
    • Upper Over-limit, No Delay
    • Fast Analog Critical
  • HIGH ACCURACY: 1% MAX OVER TEMP
  • APPLICATIONS
    • SERVERS
    • TELECOM EQUIPMENT
    • AUTOMOTIVE
    • POWER MANAGEMENT
    • BATTERY CHARGERS
    • WELDING EQUIPMENT
    • POWER SUPPLIES
    • TEST EQUIPMENT

I2C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.

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Description

The INA209 is a high-side current shunt and power monitor with an I2C interface. The INA209 monitors both shunt drop and shunt bus voltage. A programmable calibration value, combined with an internal multiplier, enables direct readouts in amperes. An additional multiplying register calculates power in watts. The INA209 features two separate, onboard watchdog capabilities: a warning comparator and an over-limit comparator. The warning comparator is useful for monitoring lower warning limits and incorporates a user-defined delay. The over-limit comparator assists with monitoring upper limits that could require immediate system shutdown.

The INA209 also includes an analog comparator and a programmable digital-to-analog converter (DAC) that combine to provide the fastest possible responses to current overload conditions.

The INA209 can be used together with hot swap controllers that already use a current sense resistor. The INA209 full-scale range can be selected to be either within the hot-swap controller sense limits, or wide enough to include them.

The INA209 senses across shunts on buses that can vary from 0V to 26V. The device uses a single +3V to +5.5V supply, drawing a maximum of 1.5mA of supply current. It is specified for operation from -25°C to +85°C.

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Technical documentation

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No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet High-Side Measurement, Bi-Directional Current/Power Monitor with I2C Interface datasheet (Rev. B) Mar. 27, 2009
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application notes Measuring Current to Handle Multiple Out-of-Range Conditions (Rev. B) May 18, 2018
Application notes Digital Interfaces for Current Sensing Devices Jun. 30, 2017
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Application notes Integrated, Current Sensing Analog-to-Digital Converter Dec. 21, 2016
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
User guides INA209EVM User's Guide (Rev. B) May 18, 2016
Application notes Understanding the I2C Bus Jun. 30, 2015
Technical articles How to get started with current sense amplifiers – part 2 May 26, 2015
User guides USB DIG Platform User's Guide (Rev. A) Feb. 14, 2010
More literature INA209EVM Quick-Start Guide (Video) (Rev. A) Apr. 17, 2008

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$199.00
Description

The INA209EVM key hardware consists of two boards, INA209 Test Board and USB DIG Platform. The INA209 Test Board contains the INA209, terminal strips for external connections, and several jumpers for device configuration. The USB DIG Platform contains an 8052 microcontroller with a built in USB (...)

Features
  • INA209 Hardware Designer‘s Kit
  • Evaluate INA209 + User‘s Current Shunt Design
  • Full Temperature Evaluation
  • Sft Cntr for the Desingers Kit to comumincate with the INA209
  • Ability to Calibrate the INA209
GUIS FOR EVALUATION MODULES (EVM) Download
SBOC248F.ZIP (3672 KB)

Software development

CODE EXAMPLES & DEMOS Download
SBOC251F.ZIP (8385 KB)
DRIVERS & LIBRARIES Download
Linux Driver for INA209
INA209SW-LINUX The Linux driver supports the INA209 Current/Power Monitor. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • ina209
Linux Source (...)

Design tools & simulation

SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
SCHEMATICS Download
SBOR001.PDF (110 KB)
SCHEMATICS Download
SBOR002.PDF (73 KB)
SCHEMATICS Download
SBOR005.PDF (37 KB)

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 16 View options

Ordering & quality

Support & training

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