FAQ
Hello everyone,
I'm working on a project containing the AD9951 as frequency generator for 145 MHz. Previously to that, the AD9859 was used, but was swapped for the pin-compatible AD9951 because of availability reasons. The issue described in the following…
Hello,
I need help selecting an low temperature drift oscillator for the AD9859. Could someone point me to tips or a reference design? The eval board uses a connector for external clock.
The datasheet says REFCLK input power -15 dBm to 3 dBm, with input…
Hello, I'm designed a dds generator on AD9859. I use a 24,576MHz clock with internal multiplier by 16x. On output I have a lot of -20dB spurs of 24.576MHz and it harmonics. Playing with level, charge pump current,pcp design has no result. What am I do…
Hi
I have a 20MHz OCXO already on the board and want to use the CMOS output as an input for the AD9859 but i'm not quite sure if i calculated the levels correctly:
The clock is a 0V - 3.3V square wave so i divide the clock voltage by 2 (resistors)…