EVM Software Overview
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SBAU248 – November 2016
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DAC8775EVM User’s Guide
4.5
DAC Calibration Controls
Each DAC may use digital calibration to reduce offset and gain errors at each channel’s output. By default
the calibration features are disabled. To enable the calibration features, the Calibration Enable Boolean
control must be checked. When the control is checked, offset and gain calibration may be controlled by
the values written to each channels Offset Calibration and Gain Calibration controls, respectively, on the
EVM GUI. For more information concerning the calibration features, please refer to the DAC8775
datasheet.
4.6
Slew-Rate Controls
The slew-rate of each channel may be controlled by the slew control registers for each channel. By default
the slew-rate control features are disabled. To enable the slew-rate control features the Slew-Rate Ctl
Enable Boolean control must be checked. When the control is checked, slew-rate step size and clock
registers may be used to control the output’s slew-rate through the Slew-Rate Ctl Step Size and Slew-
Rate Ctl Clock respectively.
4.7
Buck-Boost Converter Controls
Each buck-boost converter can be configured through the EVM GUI. The Buck-Boost Mode control is
used to select the operating mode of the buck-boost converter and the Buck-Boost Enable control is used
to enable the positive, negative, or both arms of the buck-boost converter. When Buck-Boost Mode is set
to Clamp Mode, the positive clamp and negative clamp controls are used to set each arm’s output clamp.