INA219AIDR - 26V 12-Bit I2C Power Monitor | Texas Instruments
MPN: INA219AIDR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.7091 | $0.71 |
| 10 | $0.5121 | $5.12 |
| 100 | $0.453 | $45.30 |
| 500 | $0.4333 | $216.65 |
| 1,000 | $0.4136 | $413.60 |
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
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View Datasheet →INA219AIDCNR
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$1.12 / Unit
View Datasheet →INA219AIDCNR
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$1.12 / Unit
View Datasheet →INA226AIDGSR
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$1.21 / Unit
View Datasheet →INA223AIDGSR
📋 Reference alternative (not in catalog)
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 |
| Shunt Voltage Input Range | ±320 mV (PGA gain = 1) |
| ADC Resolution | 12-bit |
| Accuracy | ±1% (A-grade) |
| Input Offset Voltage (max) | ±50 µV |
| Input Offset Drift (max) | ±0.5 µV/°C |
| I2C Interface Speed | 100 kHz / 400 kHz / 3.4 MHz |
| Number of I2C Addresses | 16 |
| Operating Temperature Range | -40°C to +125°C |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Output Type | I2C / SMBUS |
| Alert Pin | Yes (programmable) |
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 select bit 0 |
| Pin 8 | A1 — Address select bit 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, providing accurate current and voltage measurements to track charge and discharge. Its bidirectional sensing and low supply current make it perfect for smartphones, laptops, and power banks. The I2C interface allows easy integration with microcontrollers for state-of-charge estimation.
Recommended
Power Supply Monitoring
In servers and telecom equipment, the INA219AIDR monitors power supply rails to ensure efficiency and detect faults. Its 26V common-mode range allows direct connection to 12V or 24V rails. The programmable alert pin can trigger an interrupt on overcurrent, enabling rapid system shutdown to protect loads.
Recommended
Solar Panel Current Sensing
The INA219AIDR measures current from solar panels to optimize energy harvesting. Its high-side sensing capability and wide common-mode range accommodate varying panel voltages. The 12-bit ADC provides sufficient resolution for tracking maximum power point, and the I2C interface simplifies data logging in solar charge controllers.
Recommended
Motor Current Monitoring
In industrial automation, the INA219AIDR monitors motor current to detect overloads and ensure safe operation. Its bidirectional sensing allows detection of regenerative braking currents. The programmable conversion time and averaging filter help reject noise from PWM-driven motors, providing stable current readings.
Recommended
IoT Energy Monitoring
The INA219AIDR is widely used in IoT devices for energy monitoring, enabling smart meters and energy management systems. Its low power consumption and small SOIC package make it suitable for space-constrained designs. The I2C interface allows multiple sensors to be connected to a single gateway, enabling comprehensive energy monitoring.
Recommended
Test and Measurement
The INA219AIDR is used in test equipment to measure current consumption of devices under test. Its high accuracy and programmable gain allow precise measurements across a wide range of currents. The I2C interface enables automated data collection in production test systems, improving throughput and reliability.
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 | SOT-23-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit |
| Accuracy | ±1% | ±0.5% (typical) | ±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
- Bidirectional current sensing (vs INA223AIDGSR)
- I2C interface with 16 addresses (vs INA223AIDGSR)
- Wide common-mode range (vs INA169NA/3K)
Design Notes
Place the shunt resistor close to the INA219AIDR to minimize parasitic inductance and resistance in the sense path. Use Kelvin connections to the shunt to ensure accurate voltage measurement. Keep the I2C traces short and add pull-up resistors (typically 4.7kΩ) to SDA and SCL lines.
Decouple the VS pin with a 0.1µF ceramic capacitor placed as close as possible to the pin. For noisy environments, add a 10µF bulk capacitor. The INA219AIDR draws a maximum of 1mA, so power supply noise can affect measurement accuracy; a clean supply is recommended.
Ensure the shunt resistor value is chosen to keep the shunt voltage within the ±320mV range. For high currents, use a lower value shunt to avoid exceeding this limit. Also, verify that the bus voltage does not exceed 26V, as this can damage the device. The alert pin can be used to detect overcurrent conditions.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified.
