Current Shunt Monitor is optimized for accuracy.August 30, 2011 -
Supplied in 10-pin MSOP, INA226 provides fully programmable measurements for current, voltage, and power across digital I²C interface. Complete 16-bit, single-chip solution has max offset voltage of 10 µV, max gain error of 0.1%, as well as independently programmable conversion times and sample averaging. Other figures include max quiescent current of 420 µA, 140 dB CMRR and 36 V CMV. Product simplifies board design and layout constraints by not requiring any external mux or ADC.
Original Press release
Texas Instruments, Inc. (TI)
12500 TI Blvd.
Dallas, TX, 75243-4136
USA
TI Introduces Industry's Most Accurate Current Shunt Monitor
Complete single-chip solution provides 10 times greater accuracy than competitors
DALLAS -- Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced the industry's most accurate current shunt monitor. With a maximum offset voltage of 10-microvolts (uV) and a maximum gain error of 0.1%, the INA226 is 10 times more accurate than leading competitors. The device is a complete 16-bit, single-chip solution, and provides fully programmable measurements for current, voltage and power across a digital I2C interface. The INA226 benefits designers working with servers, telecom equipment, computers, power management devices and testing equipment, where accurate power measurements are crucial. To order samples and learn more, visit: http://www.ti.com/ina226-pr.
Key features and benefits
-- Single-chip digital solution with I2C interface provides current, voltage and power measurements, simplifying board design and layout constraints with no external mux or ADC required.
-- Industry leading accuracy with a maximum offset voltage of 10-uV and maximum gain error of 0.1 percent results in greater precision at low currents and allows for using smaller shunt resistors, reducing I*R loss.
-- Independently programmable conversion times and sample averaging make it easy to customize to the speed requirements of each system, and reduce software and memory requirements.
-- Maximum quiescent current of 420-uA and maximum shutdown current of 2-uA result in efficient operation that consumes 3.5 percent less power than competitors' discrete solutions, even with the INA226's integrated ADC and power mux.
-- 140-dB common mode rejection ratio (CMRR) and 36-V common mode voltage (CMV) ensure there is little to no change in offset voltage throughout the entire range of operation, simplifying error analysis.
Availability and pricing
The INA226 is available now in a 10-pin MSOP package, priced at $1.30 in quantities of 1,000.
Tools and support
An evaluation model is available for the INA226, priced at $75, featuring a USB interface and software for configuring and monitoring the performance of the device. An IBIS model is also available for designers to evaluate the INA226.
TI's current sensing portfolio
The INA226 is a powerful addition to TI's current shunt technology portfolio. TI pioneered Zero-Drift architecture and offers high-accuracy and low-drift current shunt monitors that are small, low-power and highly integrated.
For more information and technical support questions, visit the links below:
-- Order INA226 samples and evaluation modules: www.ti.com/ina226-pr.
-- Get technical support and connect with fellow engineers on the TI E2E(TM) Community: www.ti.com/ina226e2e-pr.
About Texas Instruments
Texas Instruments semiconductor innovations help 80,000 customers unlock the possibilities of the world as it could be - smarter, safer, greener, healthier and more fun. Our commitment to building a better future is ingrained in everything we do - from the responsible manufacturing of our semiconductors, to caring for our employees, to giving back inside our communities. This is just the beginning of our story. Learn more at www.ti.com.
Trademarks
TI E2E is a trademark of Texas Instruments. All registered trademarks and other trademarks belong to their respective owners.
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