We are currently evaluating the hardware.
We are having trouble with ANALOGDEVICES AD9246(DPLL) not outputting.
We are using the ACE tool to set the register settings, but it does not output.
Could you please tell me how to check the cause of the no output.
Circuit configuration
Hi,
I suppose you have an AD9545 eval board and you use ACE with the cso file you attached. If this is the case, the reason why you do not obtain outputs is that you need to execute Sync All command. Just press the button in the GUI shown below.
Then, AD9545 outputs are set as HCSL, 7.5mA by default. You need to configure the AD9545 board to accept them by doing this:
- set jumpers P300, P301, P302 between pins 2 and 3
- use a cable to connect TP307(VOUT_Common) to TP308 (GND). This because the board has the VOUT_COMMON left floating and for HCSL drivers, it needs to be connected to GND.
As an alternative, set the outputs in the GUI as CML for all OUT0A, OUT0B, OUT0C outputs, click then Apply changes and make sure that on the board, jumpers P300, P301, P302 are set between pins 1 and 2.
This is only to get clock outputs on DPLL0+APLL0 path. But the DPLL0 was not configured yet. It is in freerun.
If you tell me what you want to accomplish in relation to the 1PPS reference clock and the 32MHz oscillator (I suppose it is a OCXO), I can create a configuration for you.
Other things to consider:
- 1PPS clock should be DC coupled, possibly 1.2V CMOS or 1.8V CMOS because it is single ended. REFA path is AC coupled. My recommendation is to apply it to REFB or REFBB which are already DC coupled and take out the 50ohm R318 or R319 load on that particular path because a CMOS clock cannot drive 50ohm.
- see what the 32 MHz (OCXO?) output looks like. Most likely you'll be able to plug it in AC coupled way along REFA or REFAA. See it if requires or not 50 ohm loads. The board comes equipped with R306 and R307
The schematic of the board may be found here: https://www.analog.com/en/resources/evaluation-hardware-and-software/evaluation-boards-kits/eval-ad9545.html#eb-documentation
Petre
Hi,
I suppose you have an AD9545 eval board and you use ACE with the cso file you attached. If this is the case, the reason why you do not obtain outputs is that you need to execute Sync All command. Just press the button in the GUI shown below.
Then, AD9545 outputs are set as HCSL, 7.5mA by default. You need to configure the AD9545 board to accept them by doing this:
- set jumpers P300, P301, P302 between pins 2 and 3
- use a cable to connect TP307(VOUT_Common) to TP308 (GND). This because the board has the VOUT_COMMON left floating and for HCSL drivers, it needs to be connected to GND.
As an alternative, set the outputs in the GUI as CML for all OUT0A, OUT0B, OUT0C outputs, click then Apply changes and make sure that on the board, jumpers P300, P301, P302 are set between pins 1 and 2.
This is only to get clock outputs on DPLL0+APLL0 path. But the DPLL0 was not configured yet. It is in freerun.
If you tell me what you want to accomplish in relation to the 1PPS reference clock and the 32MHz oscillator (I suppose it is a OCXO), I can create a configuration for you.
Other things to consider:
- 1PPS clock should be DC coupled, possibly 1.2V CMOS or 1.8V CMOS because it is single ended. REFA path is AC coupled. My recommendation is to apply it to REFB or REFBB which are already DC coupled and take out the 50ohm R318 or R319 load on that particular path because a CMOS clock cannot drive 50ohm.
- see what the 32 MHz (OCXO?) output looks like. Most likely you'll be able to plug it in AC coupled way along REFA or REFAA. See it if requires or not 50 ohm loads. The board comes equipped with R306 and R307
The schematic of the board may be found here: https://www.analog.com/en/resources/evaluation-hardware-and-software/evaluation-boards-kits/eval-ad9545.html#eb-documentation
Petre
