INA260

Part: INA260AIPWR — Texas Instruments

Type: Digital Current/Power Monitor with Integrated Precision Shunt (I²C/SMBus)

Description: 0–36 V common-mode, 2.7–5.5 V supply digital current, voltage and power monitor with an integrated 2 mΩ precision shunt (15 A continuous to 85 °C), 0.15% maximum system gain error, and 16-bit ADC.

Operating Conditions:

• Supply voltage (VS): 2.7–5.5 V
• Operating temperature: -40 to 125 °C
• Common-mode input voltage: 0–36 V

Absolute Maximum Ratings:

• Max supply voltage (VS): 6 V
• Analog input current (continuous conduction): ±15 A
• Common-mode (IN+, IN-): -0.3 to 40 V
• VBUS pin: -0.3 to 40 V
• SDA, SCL, ALERT: -0.3 to 6 V
• Open-drain digital output current: 10 mA
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Current sense offset (RTI): ±1.25 mA typ, ±5 mA max
• System current sense gain error: 0.02% typ, 0.15% max (ISENSE = ±15 A, TA = 25 °C); 0.2% typ, 0.5% max (±10 A, -40 to 125 °C)
• Bus voltage gain error: 0.02% typ, 0.1% max (TA = 25 °C)
• Bus offset voltage (RTI): ±1.25 mV typ, ±7.5 mV max
• LSB step size: 1.25 mA (current), 1.25 mV (bus voltage), 10 mW (power)
• ADC conversion time: 140 μs to 8.244 ms typ (selectable via CT bits)
• Shunt: 2 mΩ sensing resistance, about 4.5 mΩ total package resistance IN+ to IN-; ±15 A continuous at -40 to 85 °C
• Quiescent current: 310 μA typ, 420 μA max; 0.5 μA typ, 2 μA max in shutdown
• Thermal resistance RθJA: 115.6 °C/W (TSSOP-16)

Features:

• Precision integrated shunt resistor with tolerance equivalent to 0.1% and 10 ppm/°C temperature coefficient
• High-side or low-side sensing
• Reports current, bus voltage and power
• Configurable averaging and ADC conversion times
• Programmable alert thresholds with open-drain ALERT output
• 16 programmable I²C addresses via A0/A1 pins
• I²C and SMBus-compatible interface

Applications:

• Test equipment
• Servers
• Telecom equipment
• Computing
• Power management
• Battery chargers
• Power supplies

Package:

• TSSOP-16 (PW), 5.00 mm × 4.40 mm nominal body

• 1 · Precision Integrated Shunt Resistor:
• -Current Sense Resistance: 2 m Ω
• -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

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

1

Not to scale

at TA = 25°C, VS = 3.3 V, VIN+ = 12 V, VSENSE = (VIN+ - VIN-) = 0 mV and VVBUS = 12 V (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted) (1)

over operating free-air temperature range (unless otherwise noted)

The INA260 is a current shunt and power monitor with an I 2 C-compatible interface. The device monitors both a shunt current and bus supply voltage. The internally calibrated integrated current sense resistor combined with an internal multiplier, enable direct readouts of current in amperes and power in watts.