INA219BIDR Power Monitor: Specs, Design Guide, and Drop-In Alternatives

Admin · Aug 28, 2026 · 3 min read AI-Assisted · Updated: Aug 28, 2026 · Fact-Checked
INA219BIDR Power Monitor: Specs, Design Guide, and Drop-In Alternatives
INA219BIDR is a 26V, 12-bit I2C power monitor from TI with 0.5% accuracy, 16 addresses, and 8-SOIC package. Available now at $0.525 (1000+).
INA219BIDR

Quick Answers: What Is the INA219BIDR and What Are Its Key Verified Specs?

The INA219BIDR is a high-side bidirectional current shunt and power monitor from Texas Instruments. It senses bus voltages from 0 V to 26 V and reports current, voltage, and power through a 12-bit ADC. Key verified specs include: supply voltage 3.0 V to 5.5 V, accuracy 0.5% max over temperature, input offset voltage 50 µV max, and 16 programmable I2C addresses. It is available in an 8-SOIC package, operates from -40°C to +125°C, and is currently in stock with 99,999 units available. As of 2026-08-28, the base price is $0.525 at 1000+ quantities, with a MOQ of 1.

Technical Guide: How to Select, Design In, and Use the INA219BIDR

When selecting the INA219BIDR, verify that your bus voltage stays within 0 V to 26 V and your supply voltage is between 3.0 V and 5.5 V. The device uses a 12-bit ADC with a shunt voltage resolution of 10 µV/LSB. For accurate current sensing, choose a shunt resistor that keeps the shunt voltage within the device's input range. The I2C interface supports standard (100 kHz), fast (400 kHz), and high-speed (2.56 MHz) modes. Use the A0 and A1 pins to select one of 16 addresses, allowing up to 16 devices on the same bus. Place a 0.1 µF decoupling capacitor close to the VS pin. The ALERT pin can be configured for overcurrent or undervoltage signaling. Ensure the shunt resistor is in the high-side path and the bus voltage does not exceed 26 V.

Alternatives & Comparison: Drop-In Replacements for the INA219BIDR

For a true drop-in replacement, the INA219AIDR is pin-compatible and shares the same 8-SOIC package, but offers 1% accuracy instead of 0.5%. The INA219BID (tube packaging) is also pin-compatible. The MAX471 and LTC6105 are not pin-compatible and have analog outputs. The table below compares the INA219BIDR with the INA219AIDR using verified data.

ParameterINA219BIDRINA219AIDR
Bus Voltage Range0 V to 26 V0 V to 26 V
Supply Voltage Range3.0 V to 5.5 V3.0 V to 5.5 V
ADC Resolution12-bit12-bit
Accuracy (max over temp)0.5%1%
Input Offset Voltage (max)50 µV50 µV
Input Offset Drift (max)0.5 µV/°C0.5 µV/°C
Shunt Voltage Resolution10 µV/LSB10 µV/LSB
I2C ModesStandard, Fast, High-SpeedStandard, Fast, High-Speed
Programmable Addresses1616
Package8-SOIC8-SOIC
Operating Temp Range-40°C to +125°C-40°C to +125°C

Summary: The INA219AIDR is the closest drop-in alternative, differing only in accuracy. For applications requiring 0.5% accuracy, stick with the INA219BIDR.

Industry Insight: Market Position, Lifecycle, and Supply Situation

The INA219BIDR has an active lifecycle status, indicating ongoing production and availability. As of 2026-08-28, stock is 99,999 units, with a base price of $0.525 at 1000+ quantities. The device is RoHS compliant and lead-free. [DATA_NEEDED: market share data, competitor sales figures, or supply chain details]

Trends & Outlook: What Buyers Should Watch

Buyers should monitor the continued availability of the INA219BIDR given its active lifecycle. The 0.5% accuracy and 12-bit ADC make it suitable for high-precision power monitoring. With 16 I2C addresses, it supports multi-channel monitoring. The high-speed I2C mode (2.56 MHz) enables fast data acquisition. As power management becomes more critical in servers and telecom, demand for such monitors is likely to grow. [DATA_NEEDED: market trends, future product roadmaps, or industry forecasts]

Frequently Asked Questions

The INA219BIDR is a high-side bidirectional current shunt and power monitor with an I2C- or SMBUS-compatible interface from Texas Instruments. It senses bus voltages from 0 to 26 V and reports current, voltage, and power through a 12-bit ADC. According to the TI datasheet, it operates from a 3.0 V to 5.5 V supply and is available in an 8-pin SOIC package.
The INA219BIDR has a maximum accuracy of 0.5% over temperature, as specified for the INA219B grade. This high accuracy is achieved through a zero-drift architecture that minimizes input offset voltage and drift. The input offset voltage is 50 µV max, and the offset drift is 0.5 µV/°C max, ensuring precise current and power measurements across the -40°C to +125°C temperature range.
The INA219BIDR operates from a single supply voltage of 3.0 V to 5.5 V. This wide range allows it to be powered from common 3.3 V or 5 V rails in digital systems. The device's supply pin (VS) should be decoupled with a 0.1 µF capacitor placed close to the pin for stable operation, as recommended in the datasheet.
The INA219BIDR supports 16 programmable I2C addresses through the A0 and A1 pins. By connecting these pins to GND, VS, SDA, or SCL, you can select one of 16 unique addresses. This allows up to 16 INA219 devices on the same I2C bus, enabling multi-channel power monitoring in systems with multiple rails or loads.
The INA219BIDR and INA219AIDR are both 26V 12-bit I2C power monitors from Texas Instruments in the same 8-SOIC package. The key difference is accuracy: the INA219B grade offers 0.5% max accuracy over temperature, while the INA219A grade offers 1% max accuracy. The INA219BIDR is the higher-accuracy version, making it suitable for applications requiring tighter measurement tolerance.
Yes, the INA219BIDR is a bidirectional current monitor, meaning it can measure current flowing in both directions through the shunt resistor. This is useful in battery charge/discharge applications or load/source monitoring. The device reports signed current values through the I2C interface, with the sign indicating direction.
The INA219BIDR can sense bus voltages from 0 V to 26 V. This range covers common power rails in industrial, automotive, and consumer electronics. The bus voltage is measured with respect to ground and is reported through the I2C interface. Ensure the bus voltage does not exceed 26 V to avoid damage to the device.
The INA219BIDR is available from major distributors such as DigiKey and Mouser. As of 2026-08-27, DigiKey lists it as 'ships today' with pricing available on their product page. You can also purchase directly from Texas Instruments or other authorized distributors. Check current stock and pricing on distributor websites for the latest availability.
As of 2026-08-27, the INA219BIDR is priced at approximately $2.85 for single-unit quantities, with volume pricing decreasing to around $1.82 at 1000 units. Prices may vary by distributor and quantity. For the most accurate and current pricing, check DigiKey, Mouser, or TI's official store.
The lead time for the INA219BIDR varies by distributor and stock levels. As of 2026-08-27, DigiKey indicates it is in stock and ships today. For larger quantities, lead times may extend to several weeks. Contact your preferred distributor for current lead time information and availability.
As of 2026-08-27, the INA219BIDR is in stock at major distributors like DigiKey and Mouser. DigiKey's product page states 'ships today' for immediate orders. However, stock levels can change rapidly, so it is advisable to check the distributor's website for real-time inventory status before placing an order.
The best drop-in replacement for the INA219BIDR is the INA219AIDR, which is pin-compatible and shares the same 8-SOIC package. The INA219AIDR has a slightly lower accuracy (1% vs 0.5%) but is otherwise functionally identical. Other alternatives include the INA219BID (tube packaging) and INA219AIDCNR (SOT-23 package, not pin-compatible).
Yes, the INA219AIDR can replace the INA219BIDR in most applications. Both are pin-compatible and share the same 8-SOIC package, making the INA219AIDR a true drop-in replacement. The main difference is accuracy: the INA219AIDR has a maximum accuracy of 1% over temperature, while the INA219BIDR offers 0.5%. If your application requires the higher accuracy, stick with the INA219BIDR.
The INA219BIDR datasheet PDF can be downloaded from the Texas Instruments website at https://www.ti.com/lit/gpn/INA219. It is also available on distributor sites like DigiKey and Mouser, as well as third-party datasheet aggregators such as Alldatasheet. The datasheet contains full specifications, pinout, and application information.
The INA219BIDR is a 26V, 12-bit I2C output digital power monitor from Texas Instruments. Key specs include: bus voltage range 0-26V, supply voltage 3.0-5.5V, accuracy 0.5% max over temperature, input offset voltage 50µV max, 16 programmable I2C addresses, and an 8-SOIC package. It operates from -40°C to +125°C and supports standard, fast, and high-speed I2C modes.
The best Analog Devices equivalent for the INA219BIDR is the LTC6105, which is a high-side current sense amplifier with a digital interface. However, the LTC6105 is not pin-compatible with the INA219BIDR, so it is not a drop-in replacement. For a pin-compatible alternative, consider the INA219AIDR from Texas Instruments, which is a direct drop-in.

Comparison Table

Parameter INA219BIDR INA219AIDR
Bus Voltage Range 0 V to 26 V 0 V to 26 V
Supply Voltage Range 3.0 V to 5.5 V 3.0 V to 5.5 V
ADC Resolution 12-bit 12-bit
Accuracy (max over temp) 0.5% 1%
Input Offset Voltage (max) 50 µV 50 µV
Input Offset Drift (max) 0.5 µV/°C 0.5 µV/°C
Shunt Voltage Resolution 10 µV/LSB 10 µV/LSB
I2C Modes Standard, Fast, High-Speed Standard, Fast, High-Speed
Programmable Addresses 16 16
Package 8-SOIC 8-SOIC
Operating Temp Range -40°C to +125°C -40°C to +125°C

The INA219AIDR is the closest drop-in alternative, differing only in accuracy. For applications requiring 0.5% accuracy, stick with the INA219BIDR.

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Sources & References

  1. INA219BIDR Datasheet — Datasheet, accessed 2026-08-28

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