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ADS5294EVM 2-wire lvds.

Prodigy 90 points

Replies: 2

Views: 623

Hey guys,


I was looking at the ADS5294EVM and wanted to use it in 12-bit 2-wire LVDS format. is this possible?, because the datasheet suggests 2-wire LVDS is supported only when the ADC is set for 14-bit resolution.

Also the ADS5294EVM schematic shows only 8 SMA connectors for 8 channels, surely for 2wire-LVDS there should be 2 SMA's per channel hence 16 SMA connectors. Could you please shed some light on this? any help would be much appreciated. Thanks very much.

Best wishes

Joel

2 Replies

  • Joel,

    We have received your post and hope to have a response back to you soon.

    Amy Schnoor

    HealthTech

    Mixed Signal Applications

    Our TI Medical E2E Forum is a large and dynamic support community!

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  • In reply to Amy Schnoor:

    Hi Joel,

    Yes, 12-bit 2-wire mode is possible. The datasheet does not mention it because the max sampling speed of 80MSPS can be met using 1-wire mode since the interface speed remains below the 1Gbps max limit. 

    The ADS5294 is an 8 analog channel device therefore, there are only 8 sma's for the analog inputs.  It is the digital output that can be used in 1-wire or 2-wire mode.  In 1-wire mode there are 8 LVDS differential pairs corresponding to the 8 analog inputs.  In 2-wire mode, there are 16 LVDS differential pairs with each analog input getting 2 outputs.  

    Regards,

    Christian 

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