Data sheet
INA209
- 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.
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.
Technical documentation
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View all 10 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | High-Side Measurement, Bi-Directional Current/Power Monitor with I2C Interface datasheet (Rev. B) | 27 Mar 2009 | |
| Application note | Using a PCB Copper Trace as a Current-Sense Shunt Resistor | PDF | HTML | 25 Jan 2022 | |
| Application note | Measuring Current for Handle Multiple Out-of-Range Conditions (Rev. C) | PDF | HTML | 04 Oct 2021 | |
| Application note | Digital Interfaces for Current Sensing Devices (Rev. A) | PDF | HTML | 30 Sep 2021 | |
| Application note | Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) | PDF | HTML | 28 Sep 2021 | |
| Application note | Getting Started with Digital Power Monitors (Rev. A) | PDF | HTML | 02 Sep 2021 | |
| EVM User's guide | INA209EVM User's Guide (Rev. B) | 18 May 2016 | ||
| Application note | Understanding the I2C Bus | PDF | HTML | 30 Jun 2015 | |
| User guide | USB DIG Platform User's Guide (Rev. A) | 14 Feb 2010 | ||
| More literature | INA209EVM Quick-Start Guide (Video) (Rev. A) | 17 Apr 2008 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Driver or library
INA209SW-LINUX — Linux Driver for INA209
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
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
- ina209
Calculation tool
CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool
This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
Supported products & hardware
Products
Analog current-sense amplifiers
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors
Calculation tool
SBOR021 — Power Monitor Tool
Supported products & hardware
Products
Digital power monitors
Digital power monitors with integrated shunt resistor
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool
TINA-TI — SPICE-based analog simulation program
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 (...)
User guide: PDF
| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 16 | View options |
Ordering & quality
Information included:
- RoHS
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- MTBF/FIT estimates
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Support & training
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