ADS125H01: 24-Bit  ΣΔADC With Rail-to-Rail OPAMP

Hi HY,

What is your input measurement range, and what gains are you looking for? Most ADCs with PGAs have some sort of common-mode voltage limitation, just like any other instrumentation amplifier. But if you tell me what you are measuring we can try to find an ADC that works for your application.

-Bryan

It is used on a smart watch to measure the signal amplified by a photodiode.

Hi HY,

Thanks for this information. Do you know the actual voltages that need to be applied to the ADC and the gains that your ADC needs to support? Photodiode output voltage can vary depending on the application, so this is not enough information to provide a recommendation.

Also, do you just need 1x ADC channel? Or do you need multiple channels to read multiple sensor inputs?

-Bryan

The input voltage shall not be greater than 2V.

The maximum magnification of ADC operational amplifier is 16.

need 1 channel ADC .

Thanks HY,

Do you need to measure a differential signal? Or is it single-ended such that one of the photodiode outputs is always grounded?

-Bryan