Поставщика припугнули вот этим письмецом от Аnaloga:
Dear customer,

As you can see in the datasheet and in the Package column of the table at the bottom of the product page: http://www.analog.com/en/digital-to-analog-converters/da-converters/ad7533/products/product.html , this part exists only in "16 ld SOIC - Wide".

The link was changed to: http://www.analog.com/en/quality-and-reliability/quality-systems-faqs/content/index.html#3

"3. Does ADI provide support on ADI products purchased through non-authorized distributors or brokers?..............................