iSuppli has published its latest tear-down analysis of Apple's latest iPod nanos, and the research once again proves the company is enjoying good profit margins on sales of its diminutive music player.

iSuppli analysts ripped a 4GB nano to pieces to uncover what makes it tick. They estimate the materials inside the device cost $72.24 to procure, noting that this is $17 cheaper than what it cost to gather the components for the 2GB first-generation iPod nano.

The report also confirms that Samsung now provides the main microprocessor, supplanting previous supplier, PortalPlayer. This chip handles file management and the user interface, according to Business Week.

Otherwise, chips used in the iPod nano include: an audio chip from Scotland's Wolfson Microelectronics; a power-management chip from Philips; and control chips for the click wheel from Cypress Semi.

The report notes that Apple doesn't let its chip suppliers brag about the part they play in producing the components that together comprise the iPod.