Allegro recommends a 4-layer PCB with a solid ground plane, and to keep the sensitive analog traces away from the digital traces. A good layout practice is to use a star-ground configuration and to minimize the loop area of the current sense lines.
Calibration involves adjusting the zero-current output voltage (VZERO) to match the device's offset voltage. This can be done by applying a known zero current condition and adjusting the VZERO trim pin to achieve a zero output voltage. Refer to the application note AN296068 for detailed calibration procedures.
Although the datasheet specifies a maximum VCC of 5.5V, it's recommended to operate the device within the 4.5V to 5.5V range to ensure reliable operation and to prevent damage from voltage spikes or transients.
The device is rated for operation up to 150°C, but it's essential to consider the package thermal resistance, PCB thermal design, and airflow to ensure the device junction temperature remains within the specified range. Consult the thermal management application note AN215146 for guidance.
To minimize EMI effects, use a shielded cable for the current sense lines, keep the device away from high-frequency sources, and use a common-mode choke or ferrite bead on the power supply lines. Additionally, ensure the PCB layout follows good EMI design practices.
Trust Checks
This model has been built in collaboration with the manufacturer.
Manufacturer Collaborated
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
A1339LLETR-5-T Overview
Use the download button to access the A1339LLETR-5-T schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like A1339,
or try a keyword search, such as Rotary Position Sensors
