AK5370 Datasheet, PDF (1/27 Pages) Asahi Kasei Microsystems – USB I/F A/D CONVERTER

ASAHI KASEI
[AK5370]
AK5370
USB I/F A/D Converter
Features:
n Incorporates USB Audio Controller
USB Serial Interface Engine
Audio Class Encoder/Decoder
2 Endpoints (FIFO)
USB transceiver
n 16 bit A/D Converter
1 channel
Mute/Volume Control
AGC pin for external control
A/D S/N: 84dBA (44.1kHz, Gain = 0dB)
n On-chip PLL
5 Sampling Frequencies support
8kHz, 11.025kHz
22.05kHz, 44.1kHz, 48kHz
n Programmable Gain Amplifier
+20dB to –58dB
n Single Power Supply, Low Power
+3.3Volts±10%
n Package
24pin VSOP
General Description
The AK5370 is AD converter for USB audio, especially
USB microphone . The AK5370 integrates USB serial
interface engine, USB transceiver, audio class decoder,
endpoints, and high quality AD converter into t he chip.
As the AK5370 incorporates PLL, it can support several
sampling frequencies, 8kHz, 11.025kHz, 22.05kHz, 44.1kHz,
and 48kHz with only one crystal. Moreover, the AK5370
integrates volume control, and mute function.
It is possible to make USB microphone with a few external
components
This device is good for not only business application such
as conferencing but also games , voice recognition, and
Karaoke.
Related Documents
For the detail of USB specification, and Audio Class, please
refer to the following documents.
Universal Serial Bus Specification Revision 1.1
Universal Serial Bus Device Class Definition for Audio
Devices, Revision 1.0
VA
VCOM ^{AGND AGC AGCEN VD}
DGND
MIC_BIAS
Common Voltage
Power
Management
MIC_IN
-
-
+
+
String ROM Config ROM
Mute
&
Volume
control
Audio Class
Decoder
Audio Class
Encoder
16bit
ADC
EndPoint1
IN_FIFO
adCLK
PLL
EndPoint0
OUT_FIFO
EndPoint0
IN_FIFO
Serial
Interface
Engine
System
CLK
Testmode1,2
TEST1,2,3
USB
DP
Transceiver
DN
AMP1O AMP2I
AMP2O
VREF
LFLT1
XTLIN
XTLOUT RST
LFLT2
CRYSTAL
MS0027-E-00
1
2000/05