The INA219AIDCNR is a zero-drift, bidirectional current-shunt and power monitor from Texas Instruments, housed in an eight-pin SOT-23 package. It senses bus voltages from 0 V to 26 V and reports current, voltage and power through an I2C/SMBus interface with 12-bit resolution and 16 programmable addresses. Powered from a 3.0 V to 5.5 V rail, the device achieves 1% accuracy and draws around 1 mA, making it well suited to compact power-monitoring and battery-gauge tasks.
Key Specifications
| Manufacturer | Texas Instruments |
| Exact Manufacturer Part Number | INA219AIDCNR |
| Product Category | Data Acquisition – Analog Front End |
| Series / Family | INA219 |
| Package / Case | SOT-23-8 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +125°C |
| Power Supply | 3.0 V to 5.5 V (0 V to 26 V bus) |
| Measured Quantity | Bus voltage 0-26 V, current, power |
| Resolution | 12-bit |
| Interface | I2C/SMBus |
| Accuracy | 1% (max) |
| Lifecycle Status | Active |
| Official Documentation | View official documentation |
Key Features
- Measures bus voltage 0 V to 26 V plus shunt current and power
- 12-bit I2C/SMBus digital output with 16 addresses
- Bidirectional current sensing for charge/discharge
- 1% accuracy (A grade) across temperature
- On-chip programmable calibration register
- 3.0 V to 5.5 V single supply, ~1 mA draw
- Compact 8-pin SOT-23 footprint
Applications
- Battery charge and discharge monitoring
- Server and telecom power supervision
- USB and portable device power gauging
- Solar and energy-harvesting measurement
- Overcurrent protection in industrial rails
Sourcing
Availability, lead time, date code and commercial terms are subject to confirmation at the time of quotation.
Quality
CHIPER sources brand-new, unused components and provides quality inspection, shortage and long lead-time sourcing, and one-stop BOM procurement. Every part is verified before shipment.
FAQ
What quantities can the INA219 report?
It measures shunt voltage, bus voltage, current and computed power, returning all three through the I2C/SMBus interface with 12-bit resolution.
How does the INA219A differ from the INA219B?
The A grade offers 1% maximum accuracy, while the B grade improves to 0.5% over temperature for tighter measurement budgets.