TEXAS Instruments has introduced the industry’s first current-sense amplifier to integrate a high-precision, low-drift shunt resistor.
The INA250 integrates the shunt resistor with a bi-directional, zero-drift current-sense amplifier to support both low-side and high-side implementations, delivering highly accurate measurements over a wide temperature range.
This integration also enables lower system cost and a smaller board footprint compared to competitive solutions, providing applications like test and measurement, communications load monitoring and power supplies with higher performance.
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 maximise system efficiency and enhance system management.
Key features and benefits of theINA250 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 pmm/°C from -40oC to 125oC, enabling higher performance of the end equipment.
- The amplifier offers offset current of 12.5mA with temperature drift of 250µA/oC 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 300 µA minimizes the load that the measurement methodology adds to the system.