Figure 8-1 shows a typical application block diagram. The split analog and digital supply pins are both powered in this example by the Texas Instruments' LP2950-N low-dropout voltage regulator. The analog supply is bypassed with a capacitor network located close to the ADC128S102-SEP. The digital supply is separated from the analog supply by an isolation resistor and bypassed with additional capacitors. The ADC128S102-SEP uses the analog supply (V_A) as its reference voltage; thus, V_A must be kept as clean as possible. Because of the low power requirements of the ADC128S102-SEP, a precision reference can also be used as a power supply.

Figure 8-1 Typical Application Circuit