This board carries the Allegro's ACS714ELCTR-05B-T hall effect-based linear current sensor, which offers a low-resistance (~1.2mΩ) current path and electrical isolation up to 2.1kV RMS.
The sensor operates at 5V and its analog voltage output has a sensitivity of 185mV/A centered at 2.5V with a typical error of ±1.5% and a 80kHz bandwidth.
Optimized bidirectional current range is from -5A to +5A, but its robustness allows survival of the device at up to 5× overcurrent conditions. Top silkscreen shows the direction that is interpreted as positive current flow.
The IC has an internal filter resistance of 1.7kΩ, and the carrier board includes a 1nF filter capacitor, which produces a low-pass RC filter with a 93,6kHz cutoff frequency.
You can improve sensing system accuracy for low-frequency sensing applictations by adding a capacitor in parallel with the integrated 1nF capacitor across the component pads labeled as CF (see notes on datasheet).
|Supply current||10mA typ. (13mA max.)|
|Current range||from -5A to +5A|
|Typical output error||±1.5%|
|Operating temperature||-40°C / +85°C|
|Dimensions||1.1” x 0.8”(27.9 x 20.3 mm)|
|Weight||0.12 oz (3.5 g)|
Code: MR008-002.1This 12" (300mm) long 3-pin JST cable is composed of 3 conductors with a 0.1" (2,54mm) spacing female socket on one end and a 3-pin JST connector on the other end; is suitable to interface many devices that have interconnections via JST header.
Code: MR003-009.2This board carries the Allegro's ACS711ELCTR-12B-T hall effect-based ±12.5A linear current sensor, which offers a low-resistance (~1.2mΩ).