Electronics > Metrology

AD4630-24 new SAR ADC from Analog Devices

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KT88:
There is a new SAR ADC in pre-release from Analog Devices:2MSPS, 24bits, +/-0.9ppm max INL...
https://www.analog.com/en/products/ad4630-24.html#product-overview

Cheers

Andreas

antintedo:
What is even more impressive, the typical INL is just 0.1ppm, even for a single ended input.
Noise seems a bit high in comparison to the best SD and SAR ADCs.

KT88:
Noise at full bandwidth can't be compared directly. A comparison at 1Hz (NSD: −166 dBFS/Hz typical) would be a meaningfull comparison / FoM. Combining the two ADCs would score additional 3dB...

Kleinstein:
The higher frequency noise looks good. For the lower frequency one would have to see in real life. There may of may no be sifnificant extra /1f noise at the reference input and maybe correlation.

For the linearity don't forget the input buffer. It is not that easy to find a buffer with so little INL.

Another impressive point is the power it needs. Just from the ADC power it would fit battery operation.

KT88:
No dedicated driver needeed in many cases - it takes only 600nA input bias current at DC.

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