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TI Releases New Current Sense Amplifier with Integrated Low-Drift Shunt Resistor


New Design Offers Higher Accuracy and Reduced Board Footprint


Texas Instruments have introduced the industry's first fully integrated first current-sense amplifier to integrate a high-precision, low-drift shunt resistor, which can deliver highly accurate measurements over a wide temperature range. TI's INA250 integrates the shunt resistor with a bi-directional, zero-drift current-sense amplifier to support both low-side and high-side implementations. Its accuracy and low drift reduce or may eliminate designers' calibration effort for many systems. This integration also enables lower system cost and a smaller board footprint compared to competitive solutions. For more information about the INA250 current-sense amplifier, see www.ti.com/INA250-pr

TI Releases New Current Sense Amplifier with Integrated Low-Drift Shunt Resistor By enabling high-accuracy measurement along with low system cost and a small board footprint, the INA250 current-sense amplifier delivers higher performance to applications such as test and measurement, communications load monitoring, and power supplies. Test and measurement designers can achieve required performance levels and potentially eliminate calibration while reducing cost up to 76 percent. High-performance enterprise and telecom equipment designers can achieve distributed measurement to maximize system efficiency and enhance system management.


Key Features and Benefits of the INA250 Current Sense Amplifier

  • Industry's most accurate integrated solution: The integrated 2-milliohm shunt resistor offers 0.1 percent tolerance as well as low drift of 15 ppm/°C from -40°C to 125°C, enabling higher performance of the end equipment.
    • The amplifier offers offset current of 12.5 mA with temperature drift of 250µA/°C and gain drift of 30 ppm/°C.
    • The integrated packaging technology ensures an optimized Kelvin connection between the IC and the resistor.
    • The amplifier enables a maximum error of 0.75 percent over the temperature range of -40°C to +125°C.
  • Reduces system cost up to 76 percent and the board footprint up to 66 percent compared to competitive solutions by integrating the shunt resistor.
  • Low power consumption: Maximum power consumption of 300µA minimizes the load that the measurement methodology adds to the system.


The company's Web site address is TI.com
[Reprinted with kind permission from Texas Instruments]


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