AD62557-USB Audio Controller with Class-D Power Amplifier & with Microphone/Line-in Interface DataSheet

Description
    AD62557 is a highly integrated USB single chip for Stereo/Mono speaker. Many useful features are programmable with pins or I2C control. When using the power supplied from the USB port (USB 3.0), AD62557 can drive a pair of up to 2.1W into
4ohm speakers due to the built-in, high efficiency and high performance Class-D amplifiers. The device also has an I2S input port and I2S output port. The I2S input port allows other external audio sources to use the Class-D amplifier to share the speakers. The I2S output port allows other high performance audio device (i.e. AD82586/AD82581).

Features
􀁺 Compliant with USB Specification v1.1, and USB 2.0 full speed
􀁺 Compliant with USB 3.0 super speed operation
􀁺 Embedded stereo ADC with Microphone Boost
􀁺 Embedded Power-On-Reset circuit
􀁺 Embedded high efficiency, high performance Class-D stereo amplifier
􀁺 Support I2S input (master and slave mode) and
I2S output interface (master mode)
􀁺 Support sampling frequency 44.1/48KHz for
playback and recording
􀁺 Pin to set recording source from internal ADC or external ADC
􀁺 Pin to set speaker mode or I2S output mode
􀁺 Support Microphone and line-in function switching
􀁺 Support volume/mute control with external button
􀁺 LED indicator function for playback, mute and recording mute
􀁺 Support 3D surround sound
􀁺 Support Microphone bias
􀁺 Support Digital microphone interface for recording
􀁺 Power Clipping function for speaker protection
􀁺 External EEPROM interface for vendor specific
and hardware configuration via I2C
􀁺 I2S input port allows AD62557 to receive ESMT’s
high performance ADC(i.e. AD12250)
􀁺 I2S output port allows AD62557 to control ESMT’s
high performance audio devices (i.e.
AD82586/AD82581)
􀁺 PWM output port to drive PWM Class-D audio
device (i.e. AD9258)
􀁺 Loudspeaker PSNR & DR (A-weighting, I2S input)
86dB (PSNR), 88dB (DR) with bead filter
􀁺 Loudspeaker output power with external power
2.1W x2CH into 4Ω@10% THD+N
1.4W x2CH into 8Ω@10% THD+N
􀁺 Efficiency with bead filter
75% for 8Ω load @ Po = 1.4W x 2CH
70% for 4Ω load @ Po = 2.1W x 2CH

􀁺 Built-in 5V to 3.3V regulator for internal device
operation
􀁺 Anti-pop design
􀁺 Over-temperature protection
􀁺 Under-voltage shutdown
􀁺 Short-circuit detection
􀁺 Single 12 MHz Crystal Input
􀁺 3.3V operation I/O
􀁺 Supports Windows Me/2000/XP/Vista/7/8, Linux
and MacOS
􀁺 Integration circuit quality meet Win7 and Win8
Hardware Logo requirement
􀁺 48-pin E-LQFP Pb-free package