SLVSE39B November 2017 – July 2018 DRV8304
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
Refer to the PDF data sheet for device specific package drawings
The SOx pin on the DRV8304 outputs an analog voltage equal to the voltage across the SPx and SNx pins multiplied by the gain setting (GCSA) as shown in Figure 30. The gain setting is adjustable between four different levels (5 V/V, 10 V/V, 20 V/V, and 40 V/V). Use Equation 3 to calculate the current through the shunt resistor.
Figure 31 and Figure 32 show the detail of the amplifier operational range. In bi-directional operation, the amplifier output for 0-V input is set at VREF / 2. Any change in the differential input results in a corresponding change in the output times the CSA_GAIN factor. The amplifier has a defined linear region in which it can maintain operation.