INA226AQDGSRQ1 Detailed explanation of pin function specifications and circuit principle instructions
The INA226AQDGSRQ1 is a product from Texas Instruments. It is a high-side current sense amplifier with an I2C-compatible interface designed to measure voltage and current in various applications.
Let me first provide a detailed breakdown of the pin functions and specifications as well as the pinout description and then move on to the FAQs.
1. Pinout of INA226AQDGSRQ1
The INA226AQDGSRQ1 comes in a 14-pin TSSOP (Thin Shrink Small Outline Package). Below is the detailed list of the pin functions:
Pin Pin Name Description 1 V+ Power supply input (2.7V to 5.5V). Provides the voltage needed to power the device. 2 SDA I2C Serial Data Input. Used to send and receive data to/from the device through the I2C interface. 3 SCL I2C Serial Clock Input. Provides the clock signal for I2C communication. 4 ALERT Alert output. This pin signals a fault or warning condition, typically configured for overcurrent. 5 GND Ground. Reference ground for the device. 6 V- Negative voltage input, connected to the load. 7 Vin+ Positive voltage input, connected to the power source. 8 A0 Address input. This pin sets the least significant bit (LSB) of the I2C address (used for I2C communication). 9 A1 Address input. This pin sets the next bit of the I2C address. 10 SDA (again) I2C Serial Data Input (redundant for the 2-pin I2C interface). 11 SCL (again) I2C Serial Clock Input (redundant for the 2-pin I2C interface). 12 Vref+ Positive reference voltage input for the differential voltage measurement. 13 Vref- Negative reference voltage input for differential voltage measurement. 14 V- (again) Negative voltage input (redundant for the differential voltage input).2. Function Description of Each Pin
Pin 1 (V+): Provides the positive voltage input to power the device. Pin 2 (SDA): Serial Data (I2C Interface). Used to communicate with other devices and transfer data. Pin 3 (SCL): Serial Clock (I2C Interface). Clock signal used to synchronize data transfer. Pin 4 (ALERT): Output that signals alerts based on pre-set conditions such as overcurrent. Pin 5 (GND): Ground reference pin. Pin 6 (V-): Negative voltage input for the load connection. Pin 7 (Vin+): Positive voltage input from the power source. Pin 8 (A0): I2C address pin (A0) used for setting I2C address for device communication. Pin 9 (A1): Another address pin used to extend the I2C address bits. Pin 10-11 (SDA, SCL): Data and clock input for I2C communication (redundant). Pin 12-13 (Vref+, Vref-): Reference voltage inputs for the differential measurement of voltages across the load. Pin 14 (V- again): Negative voltage input used for the differential voltage measurement.3. Package Type
Package Type: TSSOP (Thin Shrink Small Outline Package) Pin Count: 14 pins in total.4. 20 Common FAQ for INA226AQDGSRQ1
1. What is the power supply voltage for INA226AQDGSRQ1? The INA226AQDGSRQ1 operates with a power supply voltage between 2.7V to 5.5V. 2. What is the current measurement range for INA226AQDGSRQ1? It can measure currents with a range from ±320mA. 3. What is the communication interface used by INA226AQDGSRQ1? It uses an I2C interface for communication. 4. How is the ALERT pin used? The ALERT pin is used to signal when a fault or warning condition, such as overcurrent, occurs. 5. What is the function of the V+ pin? The V+ pin provides the positive power supply voltage to the device. 6. What are the recommended I2C address pins (A0 and A1)? The A0 and A1 pins are used to set the I2C address. These pins should be configured for your required address. 7. What type of package does INA226AQDGSRQ1 come in? It comes in a 14-pin TSSOP package. 8. What is the maximum voltage rating for the Vin+ pin? The maximum voltage rating for the Vin+ pin is 6V. 9. Can INA226AQDGSRQ1 be used to measure negative current? Yes, INA226AQDGSRQ1 is capable of measuring negative current (i.e., reverse current). 10. What is the purpose of the Vref+ and Vref- pins? These pins provide a reference voltage for differential voltage measurement. 11. What is the output format for current measurements? Current measurements are output via the I2C interface as digital values. 12. Can I connect the ALERT pin to a microcontroller? Yes, the ALERT pin can be connected to an interrupt pin on a microcontroller for handling faults. 13. What is the default I2C address for INA226AQDGSRQ1? The default address is set based on the configuration of the A0 and A1 pins, with the most common being 0x40. 14. How can I configure the ALERT pin threshold? The ALERT pin threshold can be configured through the I2C interface by writing to the corresponding register. 15. Can INA226AQDGSRQ1 measure voltage drop across a load? Yes, INA226AQDGSRQ1 can measure voltage drop and current across a load with its differential voltage input. 16. Is it possible to configure the sampling rate of INA226AQDGSRQ1? Yes, the I2C interface allows you to configure the sampling rate for measurements. 17. What is the typical operating temperature range of INA226AQDGSRQ1? The operating temperature range is -40°C to +125°C. 18. Does INA226AQDGSRQ1 have a built-in temperature sensor? No, the INA226AQDGSRQ1 does not have an internal temperature sensor. External temperature measurement would be required. 19. Can I use INA226AQDGSRQ1 for high voltage applications? No, INA226AQDGSRQ1 is typically used for low voltage applications, with the maximum voltage rating of 6V. 20. What is the significance of the ground (GND) pin? The GND pin serves as the reference ground for the entire circuit and is essential for proper functioning.This detailed information covers both the pinout and key specifications of the INA226AQDGSRQ1 as well as answers to common questions about the device. Let me know if you need further details!
