Overview
The INA226AIDGST is a high-precision current shunt and power monitor produced by Texas Instruments. This device features an I2C- or SMBus-compatible interface and is designed to monitor both shunt voltage drop and bus supply voltage. It operates from a single 2.7V to 5.5V power supply and can sense bus voltages ranging from 0V to 36V, independent of the supply voltage. The INA226AIDGST is housed in a 10-pin VSSOP (DGS) package and is specified over an operating temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VSSOP (DGS) | - |
| Pins | 10 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Power Supply Range | 2.7 to 5.5 | V |
| Bus Voltage Range | 0 to 36 | V |
| Gain Error | 0.1% | - |
| Offset Voltage | ±10µV | - |
| Quiescent Current | 330µA (typical) | - |
| ADC Resolution | 16 bits | - |
| Programmable Addresses | Up to 16 | - |
Key Features
- Senses bus voltages from 0V to 36V with high-side or low-side sensing capability.
- Reports current, voltage, and power with high accuracy: gain error of 0.1% and offset of 10µV (maximum).
- Configurable averaging options and programmable calibration value, conversion times, and averaging.
- Operates from a single 2.7V to 5.5V power supply, drawing a typical of 330µA of supply current.
- Features up to 16 programmable addresses on the I2C-compatible interface.
- Includes a multi-functional alert pin for monitoring various limit conditions (shunt voltage, bus voltage, power).
Applications
- Rack servers
- Wireless infrastructure
- High-performance computing
- Power management
- Battery cell monitors and balancers
- Power supplies
- Test equipment.
Q & A
- What is the operating temperature range of the INA226AIDGST?
The INA226AIDGST operates over a temperature range of –40°C to 125°C.
- What is the power supply range for the INA226AIDGST?
The device operates from a single 2.7V to 5.5V power supply).
- What is the maximum bus voltage the INA226AIDGST can sense?
The INA226AIDGST can sense bus voltages up to 36V).
- What is the gain error and offset voltage of the INA226AIDGST?
The gain error is 0.1% (maximum), and the offset voltage is ±10µV (maximum)).
- Does the INA226AIDGST support multiple addresses on the I2C interface?
Yes, the INA226AIDGST supports up to 16 programmable addresses on the I2C-compatible interface).
- What types of alerts can the INA226AIDGST monitor?
The device can monitor shunt voltage over-limit, shunt voltage under-limit, bus voltage over-limit, bus voltage under-limit, and power over-limit conditions).
- How does the INA226AIDGST calculate current and power?
The device measures the differential shunt voltage and bus voltage, then calculates current and power based on the programmed calibration value and shunt resistor value).
- What is the typical quiescent current of the INA226AIDGST?
The typical quiescent current is 330µA).
- What is the ADC resolution of the INA226AIDGST?
The ADC resolution is 16 bits).
- Can the INA226AIDGST be used in high-performance computing applications?
Yes, the INA226AIDGST is suitable for high-performance computing applications among others).
