Pololu ACS724 Current Sensor Carrier 0A to 20A

Pololu ACS724 Current Sensor Carrier 0A to 20A

12,95 € (Net 10,88 € )

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SKU: PO4044
GTIN: 4060137086120
Category: Current sensors
Manufacturers: Pololu
MPN: 4044
Storage Tiers: Maintain

This board is a simple carrier of Allegro’s unidirectional 20A ACS724LLCTR-20AU Hall effect-based linear current sensor, which offers a low-resistance (~1.2 m?) current path and electrical isolation up to 2.4 kV RMS. This version accepts a unidirectional current input up to 20 A and outputs a proportional analog voltage (200 mV/A) that measures 500 mV when the input current is zero. The typical output error is ±0.7%. It operates from 4.5 V to 5.5 V and is intended for use in 5 V systems.

This current sensor is a carrier board or breakout board for Allegro’s ACS724LLCTR Hall effect-based linear current sensors; we therefore recommend careful reading of the ACS724 datasheet (2MB pdf) before using this product. The following list details some of the sensor’s key features:

Differential Hall sensing rejects common-mode fields, so the orientation of the sensor relative to uniform external magnetic fields (e.g. the Earth’s magnetic field) does not affect the measurement.
The conductive path internal resistance is typically 1.2 m?, and the PCB is made with 2-oz copper, so very little power is lost in the module.
Use of a Hall effect sensor means the IC is able to electrically isolate the current path from the sensor’s electronics (up to 2.4 kV RMS), which allows the sensor to be inserted anywhere along the current path and to be used in applications that require electrical isolation.
High 120 kHz bandwidth for faster response times in control applications.
Optional FILTER pin simplifies bandwidth limiting for better noise reduction and improved resolution at lower frequencies.
Integrated digital temperature compensation circuitry allows for near closed loop accuracy over temperature in an open loop sensor.
Automotive-grade operating temperature range of -40°C to 150°C.

The pads are labeled on the bottom silkscreen, as shown in the picture to the right. The silkscreen also shows the direction that is interpreted as positive current flow via the +i arrow.

This carrier features the ACS724LLCTR-20AU, which operates at 5 V and is designed for unidirectional input current from 0 A to 20 A. When Vcc is 5 V, the output voltage is offset by 500 mV and increases by 200 mV per amp of input current.

This board ships assembled with all surface mount components, and a 3×1 strip of 0.1? header pins is included but not soldered in.

Dimensions