LT1129-5 vs ADP7102 for providing power to the AD7928?

Hi Fausto,

Although LT1129 has lower quiescent current (at no load), it has comparable ground current specifications at >1mA load vs ADP7102. 

ADP7102 is more catered for lower noise applications, and has additional features like Power-Good monitor, and programmable enable. It also has a smaller package of 3x3mm LFCSP.

If you don't require PGOOD, you can also consider ADP7118 (2x2mm LFCSP) or an even smaller ADP7112 (1x1.2mm WLCSP) which both offers both smaller package and lower noise.

Regards,

Bryan

Hi Fausto,

Although LT1129 has lower quiescent current (at no load), it has comparable ground current specifications at >1mA load vs ADP7102. 

ADP7102 is more catered for lower noise applications, and has additional features like Power-Good monitor, and programmable enable. It also has a smaller package of 3x3mm LFCSP.

If you don't require PGOOD, you can also consider ADP7118 (2x2mm LFCSP) or an even smaller ADP7112 (1x1.2mm WLCSP) which both offers both smaller package and lower noise.

Regards,

Bryan

Hello, thanks for your reply. When you talk about quiescent current, you mean current consumption?  (sorry for my ignorance in the subject)

So if I understand well, if the size of the chip and the low noise capabilities are not of great concern for my application I can use the LT1129, right?

best regards,

Fausto

Hi Fausto,

Yes, quiescent current is the device's current consumption at no-load. 

LT1129 can provide the power needed by the ADC. I'd just like to mentioned again from Jellenie, lower noise supplies are preferred for powering ADC to have good performance.

Regards,

Bryan