Overview
The INA3221AIRGVR, produced by Texas Instruments, is a triple-channel, high-side current and bus voltage monitor. It features an I2C- and SMBUS-compatible interface, making it versatile for various monitoring applications. This device is designed to monitor both shunt voltage drops and bus supply voltages, with high accuracy and programmable conversion times and averaging modes. The INA3221AIRGVR is powered by a single 2.7-V to 5.5-V supply and operates over a temperature range of –40°C to +125°C, drawing a typical supply current of 350 µA.
Key Specifications
| Parameter | Specification |
|---|---|
| Number of Channels | 3 |
| Measurement Range | 0 V to 26 V |
| Resolution | 13-bit |
| Offset Voltage | ±80 µV (max) |
| Gain Error | 0.25% (max) |
| Power-Supply Voltage | 2.7 V to 5.5 V |
| Supply Current | 350 µA (typ) |
| Operating Temperature Range | –40°C to +125°C |
| Interface | I2C- and SMBUS-compatible |
| Programmable Addresses | 4 |
| Package Type | VQFN (RGV) with 16 pins |
Key Features
- Senses bus voltages from 0 V to 26 V and reports shunt and bus voltage.
- High accuracy with offset voltage of ±80 µV (max) and gain error of 0.25% (max).
- Configurable averaging options and programmable conversion times.
- Four programmable addresses for I2C and SMBUS interfaces.
- Programmable alert and warning outputs for detecting out-of-range conditions.
- Supports critical and warning alerts for multiple programmable thresholds.
Applications
- Computers and computer peripherals.
- Power management systems.
- Telecom equipment.
- Battery chargers and power supplies.
- Test and measurement equipment.
Q & A
- What is the measurement range of the INA3221AIRGVR?
The INA3221AIRGVR can sense bus voltages from 0 V to 26 V.
- What is the resolution of the INA3221AIRGVR?
The device has a 13-bit resolution.
- What is the power-supply voltage range for the INA3221AIRGVR?
The device operates with a power-supply voltage of 2.7 V to 5.5 V.
- What is the typical supply current of the INA3221AIRGVR?
The typical supply current is 350 µA.
- What interfaces does the INA3221AIRGVR support?
The device supports I2C and SMBUS interfaces.
- How many programmable addresses does the INA3221AIRGVR have?
The device has four programmable addresses.
- What types of alerts can the INA3221AIRGVR generate?
The device can generate critical and warning alerts for detecting out-of-range conditions.
- What is the operating temperature range of the INA3221AIRGVR?
The operating temperature range is –40°C to +125°C.
- What package type is the INA3221AIRGVR available in?
The device is available in a VQFN (RGV) package with 16 pins.
- What are some common applications of the INA3221AIRGVR?
Common applications include computers, power management systems, telecom equipment, battery chargers, and test equipment.
