DSD1792A: Difference between DSD1792A and PCM1792A

Alex Lee

Prodigy 190 points

Part Number: DSD1792A
Other Parts Discussed in Thread: PCM1792A, , DSD1792

Hello

We'd like to start a DAC project with 1792, just want to know the difference between DSD1792A and PCM1792A.

Thank you very much!

over 4 years ago

0 Paul_Frost over 4 years ago

TI__Guru 53773 points

Hi,

The DSD1792 supports the DSD input format, while the PCM1792A does not. The PCM1792A also features an SPI/I2C interface to configure the device. Really if you are not using DSD specifically, you should use the PCM1792A.

Thanks,

Paul

0 Alex Lee over 4 years ago in reply to Paul_Frost

Prodigy 190 points

Hi Paul

Thanks for reply. One more question... is it okay to use 0402(1/16W) or even 0201(1/20W) resistors in I/V and LPF network in order to make the device as small as possible?

0 Paul_Frost over 4 years ago in reply to Alex Lee

TI__Guru 53773 points

Yes, that is okay, though I recommend thin-film type resistors to minimize distortion.

0 Alex Lee over 4 years ago in reply to Paul_Frost

Prodigy 190 points

o... What about the output 100R? is it for short circuit protection? if so, should it be 1206(1/4W)? thank you!

0 Paul_Frost over 4 years ago in reply to Alex Lee

TI__Guru 53773 points

The 100Ω is mostly for protection and for cap load isolation. As it's resistance is not as critical for audio performance, it could be any type. I do not think it needs to be 1/4W unless you think your amplifier can source the current.

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DSD1792A: Difference between DSD1792A and PCM1792A