Overview
The INA219AIDCNT, produced by Texas Instruments, is a highly versatile and accurate current shunt and power monitor. This device is designed to provide digital current, voltage, and power readings, making it essential for precise control and monitoring in various electronic systems. The INA219 operates with an I2C- or SMBus-compatible interface, allowing for easy integration into a wide range of applications. It is powered by a single supply voltage ranging from 3 to 5.5 V and can sense bus voltages from 0 to 26 V.
Key Specifications
| Parameter | Min | |||
|---|---|---|---|---|
| Supply Voltage (VS) | 3 | - | 5.5 | V |
| Bus Voltage Range | 0 | - | 26 | V |
| Full-scale Current Sense Voltage (VSHUNT) | - | - | ±320 | mV (PGA = /8) |
| Accuracy (INA219B) | - | - | 0.5% | % |
| Operating Temperature | -40 | - | 125 | °C |
| Supply Current | - | - | 1 | mA |
| Resolution | - | - | 12-bit | - |
| Programmable Addresses | - | - | 16 | - |
Key Features
- I2C- and SMBus-compatible Interface: Allows for easy communication and integration into various systems.
- High Accuracy: The INA219B version offers high accuracy with a maximum error of 0.5% over temperature.
- Programmable Conversion Times and Filtering: Enables flexible configuration for measurement resolution and continuous or triggered operation.
- Programmable Calibration Value: Combined with an internal multiplier, it enables direct readouts of current in amperes and power in watts.
- PGA Function: Increases the full-scale range of shunt voltage up to 2, 4, or 8 times (up to 320 mV).
- Compatibility with Hot Swap Controllers: Designed to work with controllers like the TI TPS2490.
- Power Measurement: Calculates power in the background without adding to the overall conversion time.
- Power-Down and ADC Off Modes: Reduces quiescent current and stops all conversions to conserve power.
- Input Overstress Protection: Includes protection against excessive dV/dt and inductive kickbacks.
Applications
- Power Supply Monitoring: Ideal for monitoring current, voltage, and power in power supply units.
- Hot Swap Applications: Compatible with hot swap controllers, making it suitable for systems that require hot-swappable components.
- Automotive Systems: Can be used in automotive systems to monitor battery and system health.
- Industrial Automation: Useful in industrial automation for monitoring and controlling power in various industrial equipment.
- Consumer Electronics: Suitable for use in consumer electronics to monitor and manage power consumption.
Q & A
- What is the INA219AIDCNT used for?
The INA219AIDCNT is a current shunt and power monitor used to measure current, voltage, and power in electronic systems.
- What is the operating voltage range of the INA219AIDCNT?
The INA219AIDCNT operates with a supply voltage ranging from 3 to 5.5 V.
- What is the maximum bus voltage the INA219AIDCNT can sense?
The INA219AIDCNT can sense bus voltages from 0 to 26 V.
- What is the resolution of the INA219AIDCNT?
The INA219AIDCNT has a 12-bit resolution.
- Does the INA219AIDCNT support programmable addresses?
Yes, the INA219AIDCNT supports 16 programmable addresses.
- How accurate is the INA219B version of the INA219?
The INA219B version has a maximum accuracy error of 0.5% over temperature.
- What is the PGA function in the INA219AIDCNT?
The PGA (Programmable Gain Amplifier) function increases the full-scale range of shunt voltage up to 2, 4, or 8 times (up to 320 mV).
- Is the INA219AIDCNT compatible with hot swap controllers?
Yes, the INA219AIDCNT is designed to be compatible with hot swap controllers like the TI TPS2490.
- How does the INA219AIDCNT protect against input overstress?
The INA219AIDCNT includes protection against excessive dV/dt and inductive kickbacks, and it can be further protected with series resistors and zener-type transient-absorbing devices.
- What are some common applications of the INA219AIDCNT?
The INA219AIDCNT is commonly used in power supply monitoring, hot swap applications, automotive systems, industrial automation, and consumer electronics.
