The DRV8329 integrates a high-performance low-side current sense amplifier for current measurements using a low-side shunt resistor. Low-side current measurements are commonly used to implement overcurrent protection, external torque control, or brushless DC commutation with the external controller. The current sense amplifier can be used to sense the sum of the half-bridge currents. The current sense amplifiers includes features such as configurable gain (CSAGAIN), and a voltage reference pin (CSAREF). The DRV8329 generates internally a common voltage of V_CSAREF/8.

The gain setting is adjustable between four different levels (5 V/V, 10 V/V, 20 V/V, and 40 V/V). Gain settings can be configured through CSAGAIN pin.