INA260 Precision Digital Current and Power Monitor With Low-Drift, Precision Integrated Shunt

1 Features

• Precision Integrated Shunt Resistor:
  • Current Sense Resistance: 2 mΩ
  • Tolerance Equivalent to 0.1%
  • 15-A Continuous From –40°C to +85°C
  • 10 ppm/°C Temperature Coefficient
    (0°C to +125°C )
• Senses Bus Voltages From 0 V to 36 V
• High-Side or Low-Side Sensing
• Reports Current, Voltage, and Power
• High Accuracy:
  • 0.15% System Gain Error (Maximum)
  • 5-mA Offset (Maximum)
• Configurable Averaging Options
• 16 Programmable Addresses
• Operates From a 2.7-V to 5.5-V Power Supply
• 16-Pin, TSSOP Package

2 Applications

• Test Equipment
• Servers
• Telecom Equipment
• Computing
• Power Management
• Battery Chargers
• Power Supplies

3 Description

The INA260 is a digital-output, current, power, and voltage monitor with an I²C and SMBus™-compatible interface with an integrated precision shunt resistor. It enables high-accuracy current and power measurements and over-current detection at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side, current-shunt monitor that measures current flowing through the internal current-sensing resistor. The integration of the precision current-sensing resistor provides calibration-equivalent measurement accuracy with ultra-low temperature drift performance and ensures that an optimized Kelvin layout for the sensing resistor is always obtained.

The INA260 features up to 16 programmable addresses on the I²C-compatible interface. The digital interface allows programmable alert thresholds, analog-to-digital converter (ADC) conversion times, and averaging. To facilitate ease of use, an internal multiplier enables direct readouts of current in amperes and power in watts.

The device operates from a single 2.7-V to 5.5-V supply, drawing 310 μA (typical) of supply current. The INA260 is specified over the operating temperature range between –40°C and +125°C and is available in the 16-pin TSSOP package.

1. For all available packages, see the orderable addendum at the end of the datasheet.

High-Side Sensing Application