Overview
The INA219BIDR, produced by Texas Instruments, is a high-accuracy, bidirectional current shunt and power monitor. This device is designed to monitor both shunt voltage drop and bus supply voltage, providing precise measurements of current, voltage, and power. It features an I2C- or SMBus-compatible interface, making it versatile for various applications. The INA219BIDR is part of the INA219 family, which includes two grades: A and B, with the B grade offering higher accuracy and precision specifications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bus Voltage Range | 0 to 26 | V |
| Supply Voltage | 3 to 5.5 | V |
| Supply Current | Maximum 1 | mA |
| Operating Temperature | -40 to 125 | °C |
| Resolution | 12 bits | |
| Power Measurement Accuracy | 0.5% (Maximum) over Temperature (INA219B) | |
| Programmable Addresses | 16 | |
| Package Types | SOT23-8, SOIC-8 | |
| PGA (Programmable Gain Amplifier) | /1, /2, /4, /8 | |
| ADC Conversion Time | 532 μs (12-bit), 276 μs (11-bit), 148 μs (10-bit), 84 μs (9-bit) | μs |
Key Features
- Bidirectional Current Measurement: Monitors current in both directions.
- High Accuracy: Up to 0.5% maximum accuracy over temperature for the INA219B grade.
- Programmable Gain Amplifier (PGA): Allows for adjustable full-scale shunt voltage ranges (/1, /2, /4, /8).
- Filtering Options: Various filtering and averaging settings for noise reduction.
- Calibration Registers: Enables direct readouts of current in amperes and power in watts.
- I2C- or SMBus-Compatible Interface: Features 16 programmable addresses.
- Compact Packages: Available in SOT23-8 and SOIC-8 packages.
Applications
- Servers and Telecom Equipment: For precise power monitoring and management.
- Notebook Computers and Mobile Devices: To optimize battery life and system efficiency.
- Power Management and Battery Chargers: For accurate current and power monitoring.
- Welding Equipment and Test Equipment: Where precise current measurement is critical.
- Hot Swap Controllers and Power Supplies: Compatible with devices like the TI TPS2490.
Q & A
- What is the bus voltage range of the INA219BIDR?
The INA219BIDR can sense bus voltages from 0 to 26 V. - What is the supply voltage range for the INA219BIDR?
The device operates with a supply voltage from 3 to 5.5 V. - How accurate is the power measurement of the INA219BIDR?
The INA219BIDR has a maximum power measurement accuracy of 0.5% over temperature. - What types of packages are available for the INA219BIDR?
The INA219BIDR is available in SOT23-8 and SOIC-8 packages. - Does the INA219BIDR support programmable addresses?
Yes, it supports 16 programmable addresses via its I2C- or SMBus-compatible interface. - What is the resolution of the ADC in the INA219BIDR?
The ADC resolution is 12 bits, with options for 11, 10, and 9 bits as well. - How does the PGA function in the INA219BIDR work?
The PGA allows for adjustable full-scale shunt voltage ranges of /1, /2, /4, and /8. - What are the typical applications of the INA219BIDR?
It is used in servers, telecom equipment, notebook computers, power management systems, and more. - How does the filtering work in the INA219BIDR?
The device offers various filtering and averaging settings to reduce noise in current and voltage measurements. - Is the INA219BIDR compatible with hot swap controllers?
Yes, it is designed to be compatible with hot swap controllers like the TI TPS2490.
