TQFN-40 package and board-fit
The MAX1206ETL comes in a 40-pin TQFN package — the exposed paddle underneath is the main thermal path. A stencil alignment mark on the PCB silkscreen saves a scrapped board.
Active production and RoHS status
Because it is active, sourcing is straightforward through authorized distribution channels.
What 40 MSPS means for the signal chain
40 MSPS at 12 bits — the Nyquist zone is 20 MHz, so the analog front-end needs an anti-aliasing filter with a corner below 20 MHz. The SNR at 12 bits is roughly 72 dB theoretical; expect about 68 dB ENOB from the datasheet typical curve, which sets the noise floor for the receiver chain. The 40 MSPS sample rate is a good fit for IF-sampling in base-station receivers or radar digitizers where the input bandwidth matches the converter. The TQFN package keeps the analog input trace short — critical for maintaining SFDR above 80 dBc at 10 MHz input.