USB Microphone Adapter?

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aw

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uac3556

Hi all,

could somebody give me some info/links about constructing a USB Microphone adapter?

Thx

aw
 

micronas uac 3556

Use the PCM2904 or PCM2902 Burr Brown codec from TI.
This is a USB audio device with stereo mic input and line level stereo audio output. It uses Winows drivers so you dont have to worry about writing WDM.
 

micronas uac3556

H_ttp://www.asahi-kasei.co.jp/akm/en/product/ak5370/ak5370.html

AK5370
1ch ADC with USB Interface

AK5371
2ch ADC with USB Interface

Incorporates USB Audio Controller
• USB Serial Interface Engine
• Audio Class Encoder/Decoder
• 2 Endpoints (FIFO)
• USB transceiver
16 bit A/D Converter
• 1 channel
• Mute/Volume Control
• AGC pin for external control
On-chip PLL
• 5 Sampling Frequencies support 8kHz, 11.025kHz, 22.05kHz, 44.1kHz, 48kHz
Programmable Gain Amplifier: +20dB to ｬ58dB
Single Power Supply, Low Power: +3.3Volts±10%
Package: 24-pin VSOP
 

ak5371 driver

Read the usb-audio class spec.

Each device which is compatible to that spec will be recognized
by Win and Macs as USB micro. The spec contains example descriptors
for a simple usb mic.

usbman
 

akm usb codec

You can use Micronas UAC3556
This Chip is 2CH Audio Codec !
 

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