INA219 in INA219 / INA226 Current Sensors Family
The INA219 family by Texas Instruments is a series of zero-drift, bidirectional current and power monitors with an I2C-compatible digital interface. Designed for high-side measurement, these ICs monitor both shunt voltage drop and bus supply voltage, calculating power internally. They are widely adopted in power management circuits where high accuracy and small footprints are required, providing a robust digital alternative to discrete analog current-sense amplifier circuits in space-constrained embedded systems.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | Accuracy | Package | Stock |
|---|---|---|---|
| INA219AIDR (Texas Instruments) | +/-1% | SOIC-8 | 31,084 |
| INA219AIDCNR (Texas Instruments) | +/-1% | 8-23 | 21,216 |
| INA219BIDCNR (Texas Instruments) | +/-0.5% | 8-23 | 4,804 |
| INA219BIDR (Texas Instruments) | +/-0.5% | SOIC-8 | 24,044 |
| INA219EVM (Texas Instruments) | — | — | 6 |
Variants within the INA219 family are distinguished primarily by grade and packaging. The 'A' and 'B' designations signify accuracy tiers, with the 'B' version offering higher precision and lower offset voltage. Packaging options include SOIC-8 for standard industrial layouts and the much smaller SOT-23-8 for high-density mobile applications. Evaluation modules like the INA219EVM are also available for bench testing.
