The INA226AIDGSR is a product from Texas Instruments (TI). It is a high-precision, programmable Power monitoring device used to measure voltage, current, and power in systems like battery-powered devices and industrial equipment. This device is typically used to monitor power consumption and enable energy-efficient designs.
Packaging Information:
The INA226AIDGSR is in a 14-pin TSSOP (Thin Shrink Small Outline Package) form factor, which has 14 pins in total. This type of package is commonly used for small footprint applications where space is limited.
Pinout and Pin Function:
Here is the detailed pin function list for the INA226AIDGSR in the 14-pin TSSOP package:
Pin Number Pin Name Pin Function Description 1 V+ (Supply) Power supply input pin. Connect to a positive voltage supply. 2 GND Ground pin. Connect to the system ground. 3 SDA Serial Data Input pin for I2C Communication . Connect to microcontroller's I2C data line. 4 SCL Serial Clock Input pin for I2C communication. Connect to microcontroller's I2C clock line. 5 ALERT Alert output pin for generating alerts (active-low open-drain output). 6 ADDR0 Address pin 0 for I2C address configuration. Connect to ground or V+ to configure the address. 7 ADDR1 Address pin 1 for I2C address configuration. Connect to ground or V+ to configure the address. 8 V- (Negative Voltage) Input pin for negative voltage. Connect to system's negative voltage rail. 9 VIN+ Positive input for voltage measurement. Connect to the positive side of the load. 10 VIN- Negative input for voltage measurement. Connect to the negative side of the load. 11 VOUT Voltage output for power monitoring system. 12 SHUNT+ Positive side of shunt resistor for current measurement. Connect to the system's load. 13 SHUNT- Negative side of shunt resistor for current measurement. Connect to the system's ground. 14 NC No Connection. Reserved for internal use.Circuit Principle:
The INA226AIDGSR is a power monitor that utilizes a precision analog-to-digital converter (ADC) to measure the voltage across a sense resistor (shunt resistor) placed in series with the load. The device measures the differential voltage across the shunt and uses it to calculate the current flowing through the load. It also measures the bus voltage (V+ to V-) to calculate power consumption. The device communicates with the host system (e.g., microcontroller) over I2C, where data on voltage, current, and power can be read.
The core working principle involves:
Voltage measurement (between VIN+ and VIN-), Current measurement (through SHUNT+ and SHUNT-), Power calculation (using both voltage and current data), Programmable alert functionality (via ALERT pin).FAQ: 20 Common Questions
1. What is the INA226AIDGSR used for? The INA226AIDGSR is used for monitoring power consumption, including measuring voltage, current, and power in systems. 2. How do I communicate with the INA226AIDGSR? Communication with the INA226AIDGSR is done via the I2C protocol using the SDA (data) and SCL (clock) pins. 3. What is the operating voltage range of the INA226AIDGSR? The INA226AIDGSR operates with a supply voltage range from 2.7V to 5.5V. 4. How do I configure the I2C address? The I2C address is set using the ADDR0 and ADDR1 pins, which can be tied to ground or V+ to configure the address. 5. What is the ALERT pin used for? The ALERT pin is used to signal an alert condition (e.g., over-current, under-voltage), and it is an open-drain output, requiring a pull-up resistor. 6. What type of package does the INA226AIDGSR come in? The INA226AIDGSR is packaged in a 14-pin TSSOP package. 7. How do I calculate current with the INA226AIDGSR? Current is calculated based on the voltage across the shunt resistor connected between SHUNT+ and SHUNT- pins. The INA226 uses Ohm's Law to calculate current. 8. Can the INA226AIDGSR measure both voltage and current simultaneously? Yes, the INA226AIDGSR can measure voltage, current, and power at the same time. 9. What is the accuracy of the current measurement? The INA226AIDGSR provides high-precision current measurements with a resolution of up to 16 bits. 10. How can I set the alert thresholds? Alert thresholds can be set through the configuration registers using I2C communication. 11. What are the voltage and current measurement ranges? The INA226AIDGSR supports a wide voltage measurement range from 0V to 36V and a current measurement range depending on the shunt resistor value. 12. Can the INA226AIDGSR measure negative voltages? Yes, the INA226AIDGSR can measure both positive and negative voltages, depending on how the VIN+ and VIN- pins are connected. 13. How do I use the INA226AIDGSR in a battery-powered system? The INA226AIDGSR can be used in battery-powered systems by monitoring the voltage and current to measure battery health and power consumption. 14. What is the power consumption of the INA226AIDGSR? The power consumption of the INA226AIDGSR is typically very low, suitable for battery-operated systems. 15. Can I use the INA226AIDGSR in automotive applications? Yes, the INA226AIDGSR is suitable for automotive power monitoring and other industrial applications. 16. What is the function of the VOUT pin? The VOUT pin provides the measured voltage output, reflecting the monitored voltage rail. 17. How does the INA226AIDGSR handle overcurrent situations? When an overcurrent situation occurs, the ALERT pin can be triggered, notifying the system of the condition. 18. Can the INA226AIDGSR be used in systems with high-speed communication? Yes, the INA226AIDGSR can be used in systems that require real-time monitoring with I2C communication, though the speed of communication is limited by I2C bandwidth. 19. How does the INA226AIDGSR interface with microcontrollers? The INA226AIDGSR interfaces with microcontrollers through the I2C bus, using the SDA and SCL pins for communication. 20. What is the typical application for the INA226AIDGSR? Typical applications include battery management systems, power supplies, energy monitoring systems, and industrial control systems.If you need additional details or have more specific inquiries, feel free to ask!
