AD8556 split power supply

Question

Hi everyone, 
 I am using AD8556 ( LFCSP_WQ) in a AFE with a split power supply of +/-2.5V. 
 The datasheet does not refer to the pins DVSS (13) & DVDD (15) when using a split power supply. 
 The digital stages of the AD8556 are supposed to interact with a micro-controller that works with a single supply of +3.3V. 
 How should i connect the pins of the digital stages so that the IC can be programmed by the uC? 
 Also the EPAD connection is supposed to be tied to DVss (pin 13) as per page 8 of the datasheet. Does that hold true when dealing with a split power supply of +/-2.5V? Shouldn't i connect it to system GND? 
 Any help will be highly appreciated. 
 Thanks in advance. 
 Regards 
 Manos

GLADION · Accepted Answer

Hi naftilos76 , 
 
 Good day. AD8556 uses a single-wire serial communication through its DIGIN pin. With these in mind, may we know what microcontroller you'll be using in your design so that we can determine the proper interface to be used? You may want to check this article also to help you out: Reading and Writing 1-Wire&reg; Devices Through Serial Interfaces - Application Note - Maxim (analog.com) . 
 
 Also, AD8556 comes with an evaluation board, EVAL-AD8556 ( https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/EVAL-AD8556.html ), you may want to use this as a reference in your design. Thank you. 
 
 Regards, 
 Gilbeys)

Partner Forums

Partner Libraries

Products Mentioned

AD8556 split power supply