ADE7763 Interrupts ZXTO and SAG - different behavior between two devices

Analog Devices had quality and fast technical support. This forum is just a bad substitute.

Analog Devices had quality and fast technical support. This forum is just a bad substitute.

Can you capture with a scope  the signal at the clkin pin of the second part? 

It is possible the crystal is loaded to heavily  27pf + crystal in pin capacitance + parasitic. 

With the power off measure capacitance from clkin on second part to gnd. You may need to resize the load cap on the clkout pin on part 1. 

As a test try a smaller cap like 20pf does it work then? you need to have the load capacitance correct or the part may not start up. make sure the reset pin is tied high with a resistor.

If you use a buffer at the clockin output you will have no issues as the clock out pin is designed to drive 1 cmos input.

I am not sure what the IRQ pin is in reset this is an older part. I do suggest you tie reset to 5v with a 10k resister 

What micro are you using with this part? This is a 5v part and a 3v3 micro may have issues this part without some kind of level shifting.

Dave

1. MCU have VDD = 5V. ADE7763 is wired to MCU ports directly.
2. IRQ have pullup 3k3
3. RESET is drived from MCU push pull output
4.Node CLKOUT first device, CLKIN, second device have signal 3,579545MHz, CMOS levels
5.External CLK generator is a better solution.