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