ACS712 Hall current sensor (ACS712ELC, ACS712ELC-5A)
ACS712ELC-5A breakout · Hall-effect, isolated from the load path (1.2 mΩ) · OUT = V_CC/2 + 185 mV per amp · ±5 A · 5 V supply · reads AC and DC
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: Allegro ACS712ELC (5, 20 or 30 A)
Pins
- IP+
- IP−
- VCC
- GND
- OUT
Ratings and limits
| Sensitivity | 185 mV/A |
|---|---|
| Range | ±5 A |
| Zero | V_CC/2 = 2.5 V |
| Isolation | 2.1 kV |
How to use it
The current passes through a copper path on the chip and a Hall sensor reads its field: no electrical connection to the load. Read OUT on an ADC; with a 3.3 V ADC divide it down. Measures AC mains current too.