An internally generated 4.6-V supply capable of driving up to 10 mA can be output on DVDD by leaving the DVD-EN pin unconnected. This configuration simplifies the system power-supply design especially when an isolation barrier is required to cross and generate the digital supply. The internally generated supply can be used to drive isolation components used for the digital data lines and other miscellaneous components like references and temp sensors. See Figure 9-6 for an example application. If an external supply is preferred, the DVDD pin (which can be driven up to 5.5 V in this case) can be made into an input by tying DVDD-EN to GND (see Section 7.5 for detailed specifications).