Power Supply Controller Digital Power Monitor 10-VSSOP

The INA228AIDGSR is a high-precision digital power monitor and current-sense amplifier designed for accurate measurement of shunt voltage, bus voltage, current, power, energy, and charge in DC power systems. The device integrates a low-offset differential amplifier with high-resolution analog-to-digital converters and supports bidirectional current sensing across a wide common-mode voltage range. Communication is provided through an I²C- and SMBus-compatible digital interface, enabling direct telemetry integration into embedded control and battery management systems.

The device is optimized for high-accuracy power monitoring applications requiring low drift, low offset, and high dynamic range. Integrated mathematical computation functions reduce host processor overhead by internally calculating current, power, accumulated energy, and charge values. Programmable conversion timing and averaging modes allow optimization between measurement speed and noise performance.

The INA228AIDGSR is suitable for server power distribution, industrial automation, telecom infrastructure, automotive subsystems, battery-powered equipment, and precision instrumentation requiring real-time power analytics and fault monitoring.

Engineering Specification Device Type

Digital power monitor with integrated current-sense amplifier and high-resolution ADC.

Measurement Functions

Supports measurement of:

Differential shunt voltage Bus voltage Current Power Energy accumulation Charge accumulation Temperature through external sensing methods Current Sensing

Supports bidirectional current measurements using an external shunt resistor with programmable calibration scaling.

ADC Architecture

Incorporates high-resolution delta-sigma analog-to-digital converters with programmable conversion time and averaging configuration.

Interface

Uses I²C- and SMBus-compatible serial communication interface with programmable device addressing.

Voltage Monitoring

Supports high-side and low-side sensing across a wide common-mode input voltage range suitable for multi-rail power systems.

Accuracy Features

Includes:

Low input offset voltage Low offset drift Precision gain architecture High measurement linearity Integrated calibration engine Power Computation

Internally computes:

Instantaneous power Average power Energy accumulation over time Charge accumulation over time Alert and Protection Features

Provides programmable alert functionality for:

Overcurrent Undervoltage Overvoltage Power threshold violations Conversion-ready indication Operating Modes

Supports:

Continuous conversion mode Triggered conversion mode Low-power shutdown mode Package Information

Supplied in a compact VSSOP surface-mount package suitable for automated PCB assembly and space-constrained applications.

Temperature Range

Designed for operation across industrial temperature environments suitable for embedded and power-management systems.

Typical Applications Battery management systems Power supply monitoring Server and telecom power rails Industrial control systems DC energy metering Embedded power analytics Automotive electronics Portable instrumentation

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