The DRV8889-Q1 is a fully integrated stepper motor driver, supporting
up to 1.5 A full scale current with an internal microstepping indexer, smart tune decay technology,
advanced stall detection algorithm, and integrated current sensing.
With a simple step/dir interface to manage the direction and step rate,
DRV8889-Q1 supports up to 1/256 levels of microstepping to enable a smooth motion profile.
Integrated current sensing eliminates the need for two external resistors, saving board space and
cost. With advanced stall detection algorithm, designers can detect if the motor stopped and take
action as needed which can improve efficiency and reduce noise. DRV8889-Q1 provides 8 decay mode
options including: smart tune, slow, and mixed decay options. Smart tune automatically adjusts for
optimal current regulation performance and compensates for any motor variation and aging effects.
The device also includes an integrated torque DAC which allows for the controller to scale the
output current through SPI without needing to scale the VREF voltage reference. A low-power sleep
mode is provided for very low standby current using an nSLEEP pin. The device features full duplex,
4-wire synchronous SPI communication, with daisy chain support for up to 63 devices connected in
series, for configurability and detailed fault reporting.
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