INA219 current sensor
INA219 breakout · 0.1 Ω shunt between VIN+ and VIN− in the high side · measures shunt voltage (±320 mV → ±3.2 A, 0.1 mA steps) and bus voltage (0–26 V) · I²C at 0x40 · 3–5.5 V
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: TI INA219 (Adafruit-style breakout)
Pins
- VIN+
- VIN−
- VCC
- GND
- SCL
- SDA
Ratings and limits
| Bus | 0–26 V |
|---|---|
| Shunt | 0.1 Ω, ±320 mV → ±3.2 A |
| Resolution | 0.1 mA, 4 mV |
| Address | 0x40–0x4F |
How to use it
Put it in the high side between supply and load: it reports current, bus voltage and power over I²C. Battery monitors, chargers, solar loggers.