SYSREF signal in ADRV9009

haim_l

on Aug 1, 2023

Category: Hardware

Product Number: ADRV9009

Hi,

in my application I use 4 chips ADRV9009 that works undependably- not synchronized.

My question is about the signal SYSREF.

According with data sheet this signal used for multi chip synchronization.

I transmit and receive the I and Q in each chip independently. Can I leave this signal disconnected? Or connected to GND?

According with EVB ADRV9009 you connected this signal to PLL AD9528 why?

Thanks

Haim

Clock Generation Devices Clock Generation and Distribution hardware ad9528 rf & microwave adrv9009 Clocks & Timers Wideband Transceiver IC RF Integrated Transceivers Show More

srimoyi

on Aug 1, 2023 10:38 AM
0
Yes SYSREF and DEV_CLK should go from the AD9528 clock chip to the ADRV9009 device as well as the FPGA. This helps in achieving baseband synchronization of all the clocks w.r.t to a common REF_CLK that goes as input of the AD9528. So, this step is needed.
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SYSREF signal in ADRV9009