INA219BIDR - 26V 12-Bit I2C Power Monitor | Texas Instruments
MPN: INA219BIDR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for INA219BIDR — 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:
INA219BID
✅ Drop-In📋 Reference alternative (not in catalog)
INA219AIDR
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →INA219AIDCNR
✅ Drop-In✓ In Stock
$0.61 / Unit
View Datasheet →INA219BIDR Maximum Ratings & Electrical Characteristics
| Common-Mode Voltage Range | 0 V to 26 V |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Interface | I2C / SMBUS |
| ADC Resolution | 12-bit |
| Accuracy (INA219B) | 0.5% max over temperature |
| Input Offset Voltage | 50 µV (max) |
| Input Offset Drift | 0.5 µV/°C (max) |
| Shunt Voltage Input Range | ±320 mV |
| Bus Voltage Input Range | 0 V to 26 V |
| Number of Addresses | 16 |
| Operating Temperature Range | -40°C to +125°C |
| Package | 8-SOIC (0.154, 3.90mm Width) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| RoHS Status | RoHS Compliant |
| Lead Free Status | Lead Free |
INA219BIDR Pin Configuration
| Pin 1 | A0 — Address input 0 |
| Pin 2 | A1 — Address input 1 |
| Pin 3 | ALERT — Alert output (open-drain) |
| Pin 4 | GND — Ground |
| Pin 5 | SCL — I2C clock |
| Pin 6 | SDA — I2C data |
| Pin 7 | VS — Power supply (3.0-5.5V) |
| Pin 8 | IN- — Negative shunt input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
INA219BIDR is suitable for 6 applications: Server Power Management, Battery Charger Monitoring, Telecom Power Supplies, Industrial Automation, Consumer Electronics Power Monitoring, Test and Measurement Equipment.
Server Power Management
The INA219BIDR monitors current, voltage, and power on server power rails, enabling real-time power consumption tracking and thermal management. Its 12-bit ADC and 0.5% accuracy provide precise data for optimizing energy efficiency. The I2C interface allows easy integration with baseboard management controllers (BMCs) for telemetry and alerting. With a common-mode range of 0-26 V, it can monitor 12 V and 5 V rails directly. The 16 programmable addresses enable monitoring multiple rails on the same bus, reducing component count and PCB area.
Recommended
Battery Charger Monitoring
In battery charging applications, the INA219BIDR measures charge and discharge currents with high accuracy, enabling state-of-charge estimation and protection. Its high-side sensing capability allows it to monitor current without disturbing the ground path, which is critical for battery systems. The 12-bit ADC provides fine resolution for low-current sensing, while the 0.5% accuracy ensures reliable fuel gauging. The I2C interface simplifies communication with the host microcontroller. The device's wide common-mode range supports battery voltages up to 26 V, making it suitable for multi-cell Li-ion packs.
Recommended
Telecom Power Supplies
The INA219BIDR is used in telecom power supplies to monitor input and output currents, ensuring efficient operation and protection against overcurrent conditions. Its high accuracy and wide common-mode range (0-26 V) make it suitable for monitoring 48 V bus voltages when used with appropriate scaling. The device's programmable alert pin can trigger interrupts on overcurrent or undervoltage events, enabling fast system response. The I2C interface allows remote monitoring and control, which is essential for telecom infrastructure. The 16 programmable addresses enable monitoring multiple power rails in a single system.
Recommended
Industrial Automation
In industrial automation, the INA219BIDR monitors power consumption of motors, actuators, and controllers, enabling predictive maintenance and energy optimization. Its -40°C to +125°C operating range ensures reliable performance in harsh environments. The 12-bit ADC and 0.5% accuracy provide precise current and power data for condition monitoring. The I2C interface allows easy integration with PLCs and industrial controllers. The device's high-side sensing capability is ideal for monitoring 24 V industrial supplies. The programmable alert pin can be used to detect abnormal current draw, triggering maintenance alerts.
Recommended
Consumer Electronics Power Monitoring
The INA219BIDR is used in consumer electronics such as laptops, TVs, and gaming consoles to monitor power consumption and enable energy-efficient operation. Its small 8-SOIC package and low component count make it ideal for space-constrained designs. The I2C interface allows the host processor to read power data for dynamic voltage and frequency scaling (DVFS). The 0.5% accuracy ensures reliable power reporting for energy certification compliance. The device's wide common-mode range supports various supply voltages used in consumer devices. The 16 programmable addresses enable monitoring multiple rails in a single device.
Recommended
Test and Measurement Equipment
The INA219BIDR is used in test and measurement equipment to monitor power consumption of devices under test, providing accurate current and power readings for validation and characterization. Its high accuracy (0.5%) and 12-bit resolution enable precise measurements. The I2C interface allows easy integration with data acquisition systems. The device's programmable conversion times and filtering options allow trade-offs between speed and noise. The wide common-mode range (0-26 V) supports a variety of test voltages. The 16 programmable addresses enable monitoring multiple channels in a single test setup.
Recommended
Recommended Products Summary
Engineering reference data for INA219BIDR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | INA219BID | INA219AIDR | INA219AID | INA219BIDCNR | INA226AIDGSR |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | SOT-23-8 | VSSOP-10 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Accuracy | 0.5% max | 0.5% max | 1% max | 1% max | 0.5% max | 0.1% max |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 16-bit |
| Common-Mode Voltage Range | 0-26 V | 0-26 V | 0-26 V | 0-26 V | 0-26 V | 0-36 V |
| Supply Voltage Range | 3.0-5.5 V | 3.0-5.5 V | 3.0-5.5 V | 3.0-5.5 V | 3.0-5.5 V | 2.7-5.5 V |
| Number of Addresses | 16 | 16 | 16 | 16 | 16 | 16 |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Key Differentiators
- Higher accuracy than INA219AIDR (vs INA219AIDR)
- Tape and reel packaging for automated assembly (vs INA219BID)
- Wide common-mode range and 12-bit resolution (vs INA226AIDGSR)
Design Notes
Place the shunt resistor close to the INA219BIDR to minimize parasitic inductance and resistance in the sense path. Use Kelvin connections to the shunt to ensure accurate voltage sensing. Keep the trace lengths from the shunt to the IN+ and IN- pins short and equal. A 0.1 µF bypass capacitor should be placed as close as possible to the VS pin, and a 1 µF capacitor is recommended for noisy environments.
Route the I2C lines (SDA, SCL) away from high-current traces to avoid noise coupling. Add series resistors (e.g., 2.2 kΩ) on SDA and SCL if the bus is long or has multiple devices. The ALERT pin is open-drain and requires a pull-up resistor (typically 10 kΩ) to VS. Ensure the pull-up voltage does not exceed the device's maximum rating.
Do not exceed the common-mode voltage range of 26 V on the IN+ pin. The shunt resistor must be sized to keep the shunt voltage within ±320 mV to avoid saturation. The I2C address pins (A0, A1) must be tied to GND or VS to select a valid address; floating pins can cause address conflicts. Calibration registers must be programmed correctly to obtain accurate current and power readings.
Compliance Information
RoHS compliant and lead-free per DigiKey and DigChip data. AEC-Q100 qualification not specified for this part.
