DAC53204: SPI clock speed in readback mode slower than that in write mode.

THOMAS WALTER

Part Number: DAC53204

Tool/software:

Hi,

I am getting the DAC53204 to work, and I am questionning the sense of the phrase "The SPI clock speed in readback mode is slower than that in write mode.", which is repeated several times in the DS.

For me, a readback is made (when SDO is enabled) when any ohter 24bit command is sent, but the SPI frequency is fixed, so I don't understand how this "The SPI clock speed in readback mode is slower than that in write mode." can work ?

8 months ago

0 Lucas Burnette 8 months ago

TI__Expert 4610 points

Hi,

The wording in the datasheet for the SPI clock speed is a bit confusing, but looking at the timing parameters on Page 11, the maximum supported clock frequency for SPI Write mode is much greater than for SPI Read mode:

If you need faster writing, you could write to the device with a SCLK frequency of 50 MHz, but if you were reading, you would need to slow down the clock for the read operations.

Thanks,
Lucas