DAC7553: differences between DAC7553 and DAC7552

Anna

Part Number: DAC7553
Other Parts Discussed in Thread: DAC7552,

Hi Dear

I have read the datasheet for DAC7553 and DAC7552, and the basic parameters are consistent. May I know the difference between these two models?

over 1 year ago

0 Katlynne Jones over 1 year ago

TI__Mastermind 30208 points

Hi Anna,

Thanks for your question. The difference is how the devices interpret the DAC code. On powerup, the DAC codes for both devices are cleared to zero. The data for the DAC7553 is in 2's complement, so code zero outputs VREF/2 (or mid-scale). The DAC7552 outputs 0V (zero-scale) at code zero.

I discussed the equations for both devices in this thread: https://e2e.ti.com/support/data-converters-group/data-converters---internal/f/data-converters---internal-forum/1028926/dac7552-dac7552-instead-of-by-dac7553?tisearch=e2e-sitesearch&keymatch=dac7553#

Please review and let me know if you have nay other questions.

Best,

Katlynne Jones

Data converters

Data converters forum

DAC7553: differences between DAC7553 and DAC7552