Overview
The INA220-Q1, produced by Texas Instruments, is a highly versatile and accurate current shunt and power monitor designed for automotive and other demanding applications. This device is AEC-Q100 qualified, ensuring it meets stringent automotive standards. It features an I2C- or SMBUS-compatible interface, allowing for easy integration into various systems. The INA220-Q1 can monitor both shunt drop and supply voltage, providing critical data on current, voltage, and power consumption. It operates over a wide temperature range from –40°C to +125°C, making it suitable for harsh environments.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Operating Temperature Range | –40°C to +125°C | Ambient Operating Temperature |
| Supply Voltage | 3 V to 5.5 V | |
| Bus Voltage Range | 0 V to 26 V | |
| Current Measurement Accuracy | ±0.5% (Maximum) Over Temperature | |
| Bus Voltage Measurement Accuracy | ±0.5% (Maximum) Over Temperature | |
| ADC Resolution | Up to 12 bits | |
| I2C/SMBUS Interface | Fast (2.56-MHz) compatible interface | 16 programmable addresses |
| Package | VSSOP-10 | 3.00 mm × 3.00 mm |
| ESD Classification | HBM ESD Classification Level H2, CDM ESD Classification Level C3B |
Key Features
- High- or low-side sensing capability
- Senses bus voltages from 0 V to 26 V
- Reports current, voltage, and power
- 16 programmable addresses for I2C/SMBUS interface
- High accuracy: 0.5% (maximum) over temperature
- User-programmable calibration
- Fast (2.56-MHz) I2C- or SMBUS-compatible interface
- Programmable PGA function to increase full-scale shunt voltage range
- Low power consumption: maximum of 1 mA supply current
- Power-down mode and ADC off mode for reduced quiescent current
Applications
- Electric Power Steering (EPS) Systems
- Body Control Modules
- Brake Systems
- Electronic Stability Control (ESC) Systems
- CPU power supplies and other low-side sensing applications
Q & A
- What is the operating temperature range of the INA220-Q1?
The INA220-Q1 operates over a temperature range from –40°C to +125°C.
- What is the supply voltage range for the INA220-Q1?
The INA220-Q1 can be powered by a supply voltage ranging from 3 V to 5.5 V.
- What is the maximum bus voltage that the INA220-Q1 can sense?
The INA220-Q1 can sense bus voltages up to 26 V.
- What is the accuracy of current measurement for the INA220-Q1?
The INA220-Q1 has a current measurement accuracy of ±0.5% (maximum) over temperature.
- Does the INA220-Q1 support both high-side and low-side sensing?
Yes, the INA220-Q1 supports both high-side and low-side sensing.
- How many programmable addresses does the INA220-Q1 have for its I2C/SMBUS interface?
The INA220-Q1 has 16 programmable addresses for its I2C/SMBUS interface.
- What is the maximum supply current drawn by the INA220-Q1?
The INA220-Q1 draws a maximum of 1 mA of supply current.
- Does the INA220-Q1 have power-down and ADC off modes?
Yes, the INA220-Q1 has power-down and ADC off modes to reduce quiescent current.
- What types of applications is the INA220-Q1 typically used in?
The INA220-Q1 is typically used in applications such as Electric Power Steering (EPS) Systems, Body Control Modules, Brake Systems, and Electronic Stability Control (ESC) Systems.
- How does the INA220-Q1 handle input overstress conditions?
The INA220-Q1 can handle input overstress conditions with the addition of series resistors and Zener-type transient-absorbing devices to protect against excessive dV/dt and inductive kickbacks.
