INA220BIDGSR Texas Instruments 电流和电力监控器、调节器 Bi-Direc Current/ Pwr Monitor

1 Features

1• High- or Low-Side Sensing

• Senses Bus Voltages from 0 V to 26 V

• Reports Current, Voltage, and Power

• 16 Programmable Addresses

• High Accuracy: 0.5% (Maximum) Over

Temperature (INA220B)

• User-Programmable Calibration

• Fast (2.56-MHz) I

2C- or SMBUS-Compatible

Interface

• VSSOP-10 Package

2 Applications

• Servers

• Telecom Equipment

• Notebook Computers

• Power Management

• Battery Chargers

• Automotive

• Power Supplies

• Test Equipment

3 Description

The INA220 is a current shunt and power monitor

with an I

2C- or SMBUS-compatible interface. The

INA220 monitors both shunt drop and supply voltage.

A programmable calibration value, combined with an

internal multiplier, enables direct readouts in

amperes. An additional multiplying register calculates

power in watts. The I

2C- or SMBUS-compatible

interface features 16 programmable addresses. The

separate shunt input on the INA220 allows it to be

used in systems with low-side sensing.

The INA220 is available in two grades: A and B. The

B grade version has higher accuracy and higher

precision specifications.

The INA220 senses across shunts on buses that can

vary from 0 to 26 V, useful for low-side sensing or

CPU power supplies. The device uses a single 3- to

5.5-V supply, drawing a maximum of 1 mA of supply

current. The INA220 operates from –40°C to 125°C.