SLOS751D March 2013 – November 2018 DRV2667
V(BST) must be programmed to a value of 5.0 V greater than the largest peak voltage expected in the system to allow adequate amplifier headroom. Because the programming range for the boost voltage extends to 105 V, the leakage current through the resistor divider can become significant. It is recommended that the sum of the resistances R1 + R2 be greater than 400 kΩ. When resistor values greater than 1 MΩ are used, PCB contamination may cause boost voltage inaccuracy. Exercise caution when soldering large resistances, and clean the area when finished for best results. Table 2 shows examples on how to configure the device for different output voltages.
|R1||R2||GAIN[1:0]||V(BST)||FULL SCALE PEAK VOLTAGE (V)|
|402 kΩ||18.2 kΩ||00||30||25|
|392 kΩ||9.76 kΩ||01||55||50|
|768 kΩ||13 kΩ||10||80||75|
|768 kΩ||9.76 kΩ||11||105||100|