AnsweredAssumed Answered

AD8253 PGIA nose issue

Question asked by Ray.W on Dec 9, 2015
Latest reply on Jan 25, 2016 by DavidH

Dear Sir,

The PGIA AD8253 datasheet showed noise performance:

Voltage offset RTI Vos +-150+900/G uV.

Voltage nose 0.1~10Hz,RTI,G=1, 2.5uVp-p.

 

Then I tested AC performance by 6.5 Digital MultiMeter(HP-3304A), which noise performance showed 4.03mV DC offset and 2.6mV AC ripple. The real noise seems huge than specification.

Refer to my testing schematic as blow. Any comments for this issue?

AD8253.png

Outcomes