Trace length matching on clock and JESD lines

Hi OHBsystemag 

Kindly give time for the product owner (s.ilke ) to look into this and provide their response.

Although, I'm not an expert in JESD, this is what I think:

1. DEVICE CLOCK and SYSREF CLOCK Lines:
   • The DEVICE CLOCK lines should indeed be the same length as each other, and the SYSREF CLOCK lines should also be the same length as each other. The DEVICE CLOCK lines should be shorter than the SYSREF CLOCK lines, with the recommended length difference being less than 1 inch.
2. DEVICE CLOCK, CORE CLOCK, and REFERENCE CLOCK Lines:
   • These lines should be the same length as each other to ensure proper timing and synchronization.
3. JESD Lines in ADC1:
   • The JESD lines can have a slight deviation in length from each other, typically within a few millimeters. The accordion method is generally discouraged for JESD204B lines to maintain signal integrity.
4. JESD Lines in ADC2:
   • Similar to ADC1, the JESD lines in ADC2 can have a slight deviation in length from each other, within a few millimeters. The accordion method should be avoided. Verify differential impedance of the traces is 100 Ω.
5. JESD Lines Between ADCs:
   • The JESD lines of each ADC do not need to be the same length as the other ADC. Each ADC's JESD lines should be consistent within the ADC itself.
6. SYNC Lines:
   • The SYNC lines of both ADCs must be the same length to ensure proper synchronization across the devices

Also note that the minimum sample rate of AD9208 is 2.5 GSPS.

You can also want to check out other ADC below:

• AD9680 Datasheet and Product Info | Analog Devices - 14-Bit, 1.25 GSPS/1 GSPS/820 MSPS/500 MSPS JESD204B, Dual Analog-to-Digital Converter
• AD9695 Datasheet and Product Info | Analog Devices - 14-Bit, 1300 MSPS/625 MSPS, JESD204B, Dual Analog-to-Digital Converter
• AD9691 Datasheet and Product Info | Analog Devices - 14-Bit, 1.25 GSPS JESD204B, Dual Analog-to-Digital Converter

Hi OHBsystemag 

Kindly give time for the product owner (s.ilke ) to look into this and provide their response.

Although, I'm not an expert in JESD, this is what I think:

1. DEVICE CLOCK and SYSREF CLOCK Lines:
   • The DEVICE CLOCK lines should indeed be the same length as each other, and the SYSREF CLOCK lines should also be the same length as each other. The DEVICE CLOCK lines should be shorter than the SYSREF CLOCK lines, with the recommended length difference being less than 1 inch.
2. DEVICE CLOCK, CORE CLOCK, and REFERENCE CLOCK Lines:
   • These lines should be the same length as each other to ensure proper timing and synchronization.
3. JESD Lines in ADC1:
   • The JESD lines can have a slight deviation in length from each other, typically within a few millimeters. The accordion method is generally discouraged for JESD204B lines to maintain signal integrity.
4. JESD Lines in ADC2:
   • Similar to ADC1, the JESD lines in ADC2 can have a slight deviation in length from each other, within a few millimeters. The accordion method should be avoided. Verify differential impedance of the traces is 100 Ω.
5. JESD Lines Between ADCs:
   • The JESD lines of each ADC do not need to be the same length as the other ADC. Each ADC's JESD lines should be consistent within the ADC itself.
6. SYNC Lines:
   • The SYNC lines of both ADCs must be the same length to ensure proper synchronization across the devices

Also note that the minimum sample rate of AD9208 is 2.5 GSPS.

You can also want to check out other ADC below:

• AD9680 Datasheet and Product Info | Analog Devices - 14-Bit, 1.25 GSPS/1 GSPS/820 MSPS/500 MSPS JESD204B, Dual Analog-to-Digital Converter
• AD9695 Datasheet and Product Info | Analog Devices - 14-Bit, 1300 MSPS/625 MSPS, JESD204B, Dual Analog-to-Digital Converter
• AD9691 Datasheet and Product Info | Analog Devices - 14-Bit, 1.25 GSPS JESD204B, Dual Analog-to-Digital Converter

Thank you