ZHCSIP5 August 2018 PGA305
PRODUCTION DATA.
The DAC gain buffer is a configurable buffer stage for the DAC output. The DAC gain amplifier can be configured to operate in voltage amplification mode for voltage output or current amplification mode for 4-mA to 20-mA applications. In voltage output mode, set the DAC_GAIN bits in the DAC_CONFIG register to a specific value to configure the DAC gain as shown in Figure 20. Use the 2-bit DAC_GAIN field to configure the DAC gain to one of four possible gain configurations.
The final step of DAC gain is connected to PWR and ground, which gives the user the ability to drive the VOUT voltage close to the VPWR voltage.
The DAC gain buffer also implements a COMP pin to allow the user to implement compensation when driving large capacitive loads.