AD62551A is a USB controller with external amplifier and recording function. It is compliant with USB Specification v1.1 and USB 2.0 full speed. It supports I2S input and I2S output interface of master mode with a sampling frequency of 48kHz. It supports recording function and is compatible with Win Me/2000/XP and MacOS. It is a true plug-and-play application and does not require a driver for basic USB speaker application. It supports volume/mute control with an external button and has a built-in 5V to 3.3V regulator for internal device operation. It has a 12 MHz crystal input and comes in a 32-pin LQFP package.
The AD62551A is a USB audio controller that supports both USB 1.1 and USB 2.0 full‑speed operation, includes I²S input and output ports, and offers recording functionality with external amplifier control.
The document lists the device features, functional block diagram, pin assignment table, absolute maximum ratings, and recommended operating conditions, helping designers integrate the chip into USB speaker or audio recording applications.
| USB Specification | USB 1.1 and USB 2.0 full speed |
|---|---|
| Crystal Input Frequency | 12 MHz |
| Package | 32‑pin LQFP (Pb free) |
| Input Voltage Range | -0.3 V to 3.6 V |
| Storage Temperature Range | -65 °C to 150 °C |
| Recommended VDD | 4.5 V – 5.5 V |
It complies with USB Specification v1.1 and USB 2.0 full‑speed operation.
Pin 25 (USBDM) provides the USB data D‑ line.