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Histogram of ADC codes

Category: Datasheet/Specs
Product Number: AD5593R

Hello,

i'm going through the AD5593R datasheet (rev H). On page 9, figures 10,11 there are histograms of ADC codes.

the Vin is 1.5V, and the external reference is 2.5V. The ADC is 12-bit. 

i would expect the code to be 1.5/2.5*4096-1 = 2457 but in the figures, these codes are 2525-2530 which is significantly off.

Is there an error in the datasheet or did I misunderstand something?

Edit Notes

fixed typo in the conversion formula
[edited by: Mihael at 10:02 AM (GMT -4) on 2 Apr 2025]