Today, they have begun to circulate a series of photographs showing X - ray images of lightning adapter Apple headphone minijack. What is striking about the images, it is that X-rays reveal a sophisticated circuit all located inside the headset adapter,
X - ray revealed adapter integrated circuit quite unique and most likely case of a built- in digital - to - analog (DAC) converter. And not only includes a DAC converter as in X-ray images can be appreciated things like an integrated amplifier and an analog to digital converter (ADC).
It should be noted that previous iPhones handle DAC and ADC functions internally through a custom Apple chip / Cirrus Logic on the logic board. X-ray analysis headphone adapter show that integrated circuits are marked as "338S00140 A0SM1624 TW", which is probably some kind of DAC.