Hello everyone~
I have an ADXL354 and I am designing a low noise circuit. May I ask if I should use 3.3VLDO to supply VCC of ADXL354 or 1.8VLDO to supply V1P8ANA of ADXL354?
Last question, can you recommend a low noise external LDO for ADXL354?
my power supply is 5V I am using ADR4550 as reference voltage.
Thanks for your replies.
ADR4550 is fine. any LDO or reference with low-noise is fine.
For the best performance, you can use LTC6655
use a 1.8V voltage reference to power the V1P8ANA is better, but I don't think the difference is big.
More importantly, I think choosing an ADC with the same reference as V1P8ANA is better.
I checked with our design team. Here is their answer:
“… the sensor and front-end amplifier are the dominant noise sources. The signal path is fully differential, and the ADC and signal path are all ratiometric…
Thank you for your answer
So if I use a 1.8V voltage reference to power the V1P8ANA or use a 3.3V voltage reference to power the ADXL354's VDD which is better?
Or both methods are similar in terms of noise reduction.
use a 1.8V voltage reference to power the V1P8ANA is better, but I don't think the difference is big.
More importantly, I think choosing an ADC with the same reference as V1P8ANA is better.
