Overview
The INA3221AIRGVT, produced by Texas Instruments, is a three-channel, high-side current and bus voltage monitor. It features an I2C- and SMBUS-compatible interface, allowing for precise monitoring of both shunt voltage drops and bus supply voltages. This device is designed to provide high accuracy measurements, with configurable conversion times and averaging modes, making it suitable for a variety of applications requiring precise voltage and current monitoring.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 3 |
| Bus Voltage Range | 0 V to 26 V |
| 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 (16 pins) |
| Package Size | 4.00 mm x 4.00 mm |
Key Features
- Senses bus voltages from 0 V to 26 V and reports both shunt and bus voltage.
- High accuracy with offset voltage of ±80 µV (max) and gain error of 0.25% (max).
- Configurable averaging options for measurement precision.
- Four programmable addresses for I2C- and SMBUS-compatible interface.
- Programmable alert and warning outputs for detecting out-of-range conditions.
- Supports continuous and single-shot measurement modes.
- Power-down mode to reduce quiescent current.
Applications
- Computers
- Power Management
- Telecom Equipment
- Battery Chargers
- Power Supplies
- Test Equipment
Q & A
- What is the primary function of the INA3221AIRGVT?
The INA3221AIRGVT is a three-channel, high-side current and bus voltage monitor that senses both shunt voltage drops and bus supply voltages. - What is the voltage range that the INA3221AIRGVT can monitor?
The device can monitor bus voltages from 0 V to 26 V. - What is the accuracy of the INA3221AIRGVT in terms of offset voltage and gain error?
The offset voltage is ±80 µV (max), and the gain error is 0.25% (max). - What types of interfaces does the INA3221AIRGVT support?
The device supports I2C- and SMBUS-compatible interfaces. - How many programmable addresses does the INA3221AIRGVT have?
The device has four programmable addresses. - What are the power supply requirements for the INA3221AIRGVT?
The device operates from a single 2.7-V to 5.5-V supply and draws 350 µA (typ) of supply current. - What is the operating temperature range of the INA3221AIRGVT?
The operating temperature range is –40°C to +125°C. - Does the INA3221AIRGVT support different measurement modes?
Yes, it supports both continuous and single-shot measurement modes. - How does the power-down mode function in the INA3221AIRGVT?
The power-down mode reduces the quiescent current and turns off current into the INA3221 inputs, with full recovery requiring 40 µs. - What types of alerts does the INA3221AIRGVT support?
The device supports programmable critical and warning alerts, as well as power-valid alerts.
