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AD9957's  power supply

Question asked by xubing on Feb 28, 2014
Latest reply on Mar 10, 2014 by xubing

Hi, everyone


I'm confused with the power supply of AD9957 evaluation board. The following picture is the Power Connection part of the board.

图像 1.jpg

As the UG-208 says, TB1 and TB2. TB1 powers the USB interface circuitry, the digital I/O interface, and the digital core. TB2 powers the DAC and the clock input circuitry.

  • What if powering TB2 with analog voltage and analog GND?
  • How much of the courrent?


Thanks very much!