Repair wizards over at iFixit along with their pals at Creative Electron gave Apple’s new $9 iPhone 7 Lightning headphone adapter a thorough X-ray treatment. The analysis has revealed a surprising amount of circuitry inside of the dongle.
Most notably, it packs in a pretty unique integrated circuit that's most likely a built-in digital-to-analog (DAC) converter. There’s actually a lot going on in the diminutive adapter aside from the DAC, writes iFixit, including things like an integrated amplifier and an analog-to-digital-converter (ADC).
“We’re surprised how much electronics Apple was able to include inside this little cable,” said Creative Electron, which builds X-ray inspection systems for electronics.