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DRV5032: DRV5032

Part Number: DRV5032

Hi Sir,

Pls kindly advise 2 questions for DRV5032, thanks.

1. R22 use 560K ,is good?

2. What max. value for R22?

Thanks, Ian.

  • Ian,

    According to the schematic, the part the customer is using is DRV5032FA, which is a push-pull version of the device, not open drain. These devices do not require a pull-up resistor, and can directly drive the GPIO pin. I've attached the image from the datasheet for setup. :

  • Hi Sir,

    Customer suing DRV5032"AJ", it should need pull hi resistors, is it?

    Thanks, Ian. 

  • Ian,

    If the customer is using the AJ version, yes, it will need a pull up resistor. Check out this app note for a detailed look into this subject, but here are answers to your two above questions:

    1. The answer is maybe. This is not a question with an objective answer. When the FET internal to the DRV5032 is turned on, the OUT node will be pulled low; the speed with which this node will be pulled down is an RC response, where the time constant is this chosen resistance value multiplied with the capacitance on the node (parasitic capacitance, load capacitance, as well as the bypass capacitance will come into play here). The process of actually calculating this value is pretty involved, so I would advise your customer to determine this value empirically. The main takeaway here is that the larger the value that they select, the lower power the solution will be, but this will come at the tradeoff of the speed in which this line transcends from high to low.

    2. As I said in part 1, this resistor is mainly to dictate the current flow to pull the node low, so technically this value can be whatever you wish. Just be aware that the larger the resistor value you choose, the more delay will occur between a magnetic read and the actual output of the device registering it to the OUT node.