Are ADN4696E compatible with ADN4662?

mauri1106 on Feb 2, 2012

Hello,

are the ADN4696E/ADN4697E logic level compatibles with ADN4661/ADN4662?

Can I directly connect these 2 devices?

Thanks in advance

Maurizio.

Parents

0 ConalW

on Feb 3, 2012 9:28 PM

Hello Maurizio,

Thank you for the explanation. If I understand correctly, the board in design may be SPI master or slave (Potentially ADN4696E for the interface) that will connect to one other board (either a master or a slave, with ADN4661/ADN4662).

Going by the datasheets for these devices, this should work, but contention should be avoided where there is an ADN4661 at the other end of a channel. For example when the new board is connected, have all the ADN4696E devices in receive only mode (DE and /RE low) to begin with.

If I understand correctly, there would be the following two cases for the new board once it is connected:

New board is Master:

SPI signal (as LVDS)	New Board (as master) Devices	Direction	Old Slave Board Devices
/CS	ADN4696E (DE high, /RE high)	--->	ADN4662
CLK	ADN4696E (DE high, /RE high)	--->	ADN4662
MOSI	ADN4696E (DE high, /RE high)	--->	ADN4662
MISO	ADN4696E (DE low, /RE low)	<---	ADN4661

New board is Slave:

SPI signal (as LVDS)	New Board (as slave) Devices	Direction	Old Master Board Devices
/CS	ADN4696E (DE low, /RE low)	<---	ADN4661
CLK	ADN4696E (DE low, /RE low)	<---	ADN4661
MOSI	ADN4696E (DE low, /RE low)	<---	ADN4661
MISO	ADN4696E (DE high, /RE high)	--->	ADN4662

Regards,

Conal

Reply