Catalyzes the hydrolytic deamination of adenosine and 2-deoxyadenosine. adenosine + H(+) + H2O = inosine + NH4(+) 2'-deoxyadenosine + H(+) + H2O = 2'-deoxyinosine + NH4(+) Binds 1 zinc ion per subunit. Belongs to the metallo-dependent hydrolases superfamily. Adenosine and AMP deaminases family. Adenosine deaminase subfamily.