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High Speed ADC - problem with minimum input voltage

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sleeper1987

New Member
Hi!
I need a high speed ADC to sample pixel data from a CMOS sensor, which produces values between 0 and 3.3V. The sampling speed I need is >= 3MSPS, with a resolution of at least 10 bits.

Problem is; all the ADCs I'm looking at seem to only accept inputs between 1 and 2/3 volts. Am I reading the data sheets wrong, or can anyone suggest a good way to bias the input voltages at such high speeds?


Example datasheets:
https://www.national.com/ds/DC/ADC12010.pdf
https://www.ti.com/lit/gpn/ads900

Thanks for any help.
 

Boncuk

New Member
I just took a glance at the ADC12010.

There is no miminum voltage stated in the data sheet.
 

sleeper1987

New Member
Ah, looks like you're right.
I think I was confused by the wording. It says, "Analog input voltage in single ended operation", which I took to mean the measured voltage, rather than the reference.

Thanks for your reply!
 
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