INA219AIDR - 26V 12-Bit I2C Power Monitor | Texas Instruments
MPN: INA219AIDR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.52 | $1.52 |
| 10 | $1.35 | $13.50 |
| 100 | $1.08 | $108.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.78 | $780.00 |
Drop-in alternatives for INA219AIDR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
INA219BIDR
✅ Drop-In📋 Reference alternative (not in catalog)
INA219AIDCNR
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →INA219AIDR Maximum Ratings & Electrical Characteristics
| Supply Voltage | 3 V to 5.5 V |
| Supply Current (max) | 1 mA |
| Common-Mode Voltage Range | 0 V to 26 V |
| Bus Voltage Range | 0 V to 26 V |
| Shunt Voltage Range | ±320 mV (PGA=1) |
| ADC Resolution | 12-bit |
| Interface | I2C/SMBUS |
| I2C Addresses | 16 programmable |
| Accuracy | ±1% |
| Input Offset Voltage (max) | ±50 µV |
| Input Offset Drift (max) | ±0.5 µV/°C |
| Operating Temperature Range | -40°C to 125°C |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
INA219AIDR Pin Configuration
| Pin 1 | IN+ — Positive shunt voltage input |
| Pin 2 | IN- — Negative shunt voltage input |
| Pin 3 | GND — Ground |
| Pin 4 | VS — Power supply (3V to 5.5V) |
| Pin 5 | SDA — I2C data line |
| Pin 6 | SCL — I2C clock line |
| Pin 7 | A0 — Address pin 0 |
| Pin 8 | A1 — Address pin 1 |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
INA219AIDR is suitable for 6 applications: Battery Monitoring, Power Supply Monitoring, Solar Panel Current Sensing, Motor Current Monitoring, IoT Energy Monitoring, Test and Measurement.
Battery Monitoring
The INA219AIDR is ideal for battery monitoring in portable devices, electric vehicles, and energy storage systems. Its bidirectional current sensing capability allows accurate charge and discharge current measurement. With a 12-bit ADC and ±1% accuracy, it provides reliable state-of-charge estimation. The I2C interface enables easy integration with microcontrollers for real-time battery telemetry. The wide common-mode range of 0-26V supports various battery stack voltages. Its low 1mA supply current minimizes impact on battery life.
Recommended
Power Supply Monitoring
In server, telecom, and industrial power supplies, the INA219AIDR monitors output current and voltage to ensure proper operation and efficiency. Its high-side sensing capability allows it to measure current without disrupting the ground path. The programmable alert pin can trigger an interrupt on overcurrent or undervoltage conditions, enabling fast fault response. The I2C interface allows multiple monitors to be connected to a single bus for comprehensive power rail monitoring. The 12-bit resolution provides sufficient granularity for most power supply applications.
Recommended
Solar Panel Current Sensing
The INA219AIDR is used in solar charge controllers to measure the current flowing from solar panels to batteries. Its bidirectional capability allows it to detect both charging and discharging currents. The wide common-mode voltage range accommodates varying panel voltages. The I2C interface enables the controller to log energy production and consumption data. The ±1% accuracy ensures precise energy yield calculations. The device's low power consumption is beneficial for off-grid systems.
Recommended
Motor Current Monitoring
In industrial automation and robotics, the INA219AIDR monitors motor current to detect overloads, stalls, and efficiency. Its high-side sensing allows it to measure current in the motor supply line. The bidirectional capability is useful for regenerative braking systems. The alert pin can be used to shut down the motor driver in case of overcurrent. The I2C interface allows integration with PLCs or microcontrollers for condition monitoring. The wide temperature range of -40°C to 125°C suits harsh industrial environments.
Recommended
IoT Energy Monitoring
The INA219AIDR is popular in IoT devices for energy monitoring, such as smart plugs and energy meters. Its small 8-SOIC package and I2C interface make it easy to integrate into space-constrained designs. The low supply current is ideal for battery-powered IoT nodes. The 12-bit resolution provides adequate accuracy for energy billing and monitoring. The device can measure both AC and DC power with appropriate shunt resistors. The alert pin can be used to wake the system on power events.
Recommended
Test and Measurement
In bench instruments and data acquisition systems, the INA219AIDR provides precise current and power measurements. Its high accuracy and low offset make it suitable for calibration and verification. The programmable conversion times allow trade-offs between speed and resolution. The I2C interface enables easy integration with embedded systems. The device can be used in multimeters, power analyzers, and electronic loads. Its wide temperature range ensures stable performance in lab environments.
Recommended
Recommended Products Summary
Engineering reference data for INA219AIDR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | INA219BIDR | INA219AID | INA219AIDCNR |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOT-23 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit |
| Accuracy | ±1% | ±0.5% | ±1% | ±1% |
| Supply Voltage | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V |
| Common-Mode Voltage | 0V to 26V | 0V to 26V | 0V to 26V | 0V to 26V |
| I2C Addresses | 16 | 16 | 16 | 16 |
| Alert Pin | Yes | Yes | Yes | Yes |
Key Differentiators
- Higher accuracy than A-grade (vs INA219AIDR)
- Smaller package option (vs INA219AIDR)
- Higher resolution ADC (vs INA219AIDR)
Design Notes
Place the shunt resistor close to the INA219AIDR to minimize parasitic inductance and resistance. Use Kelvin connections to the shunt to ensure accurate voltage sensing. Keep the input traces short and wide to reduce noise pickup. A 0.1µF bypass capacitor should be placed as close as possible to the VS pin.
For high-side sensing, connect the IN+ pin to the bus voltage side of the shunt and IN- to the load side. Ensure the common-mode voltage does not exceed 26V. For I2C communication, use pull-up resistors (typically 4.7kΩ) on SDA and SCL lines. Keep I2C traces short and avoid routing near high-noise sources.
Do not exceed the absolute maximum ratings: supply voltage 6V, shunt input voltage -0.3V to 26V. Ensure the shunt resistor value is chosen so that the shunt voltage stays within the ±320mV range. Incorrect calibration values can lead to inaccurate current readings. Always initialize the configuration register after power-up.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified.
