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**Placement of pull-up and pull-down resistors ,
Atta Rehman , 08-25-2025, 03:44 AM
Where should place PU /PD resistors , either close to source (driver side ) or load (receiver side) pins . e.g. case of ADC interface with controller.
Robert Feranec , 08-25-2025, 10:42 AM
often I place them at the far end from the master/driver so for example the clock signal/track pull up is at the receiver end. But in many case there is no space or the signals may have multiple branches then I just place it where is space. Depends on interface, but you may be talking maybe about I2C
Atta Rehman , 08-26-2025, 02:15 AM
Thanks , Sir . Robert. i am talking about ADC SPI interface with controller at 20MHz.
Robert Feranec , 08-27-2025, 11:57 PM
SPI usually doesn't need pullups. Is datasheet or reference schematic saying something about it? Is the trace long? What kindof pull up value they recommend?
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