ASAHI KASEI
[AK5371A]
AK5371A
Features:
USB-IF Certified
Incorporates USB Audio Controller
USB Serial Interface Engine
Audio Class Encoder/Decoder
2 Endpoints (FIFO)
USB transceiver
16 bit A/D Converter
2 channels
Mute/Volume Control
A/D S/N: 84dBA (44.1kHz, Gain = 0dB)
Low Power Dissipation
Normal Operation: 26mA
Suspend Mode: < 1uA
Programmable Gain Amplifier (IPGA)
+24dB to –31dB @1dB Step
20dB Pre-amplifier
On-chip PLL
5 Sampling Frequencies support
8kHz, 11.025kHz
22.05kHz, 44.1kHz, 48kHz
EEPROM I/F
can customize Device Descriptor,
and String Descriptor
Single Power Supply, Low Power
+3.3±0.3 Volts
Package
48pin LQFP
2ch A/D Converter with USB I/F
General Description
The AK5371A is stereo A/D converter with USB I/F. The
AK5371A integrates USB serial interface engine, USB
transceiver, audio class processing unit, endpoints, and high
quality 2 channel AD converter into the chip.
As the AK5371A incorporates PLL, it can support several
sampling frequencies, 8kHz, 11.025kHz, 22.05kHz, 44.1kHz,
and 48kHz with only one crystal. Moreover, the AKAK5371A
integrates volume control, and mute function.
Not only power consumption at normal operation is very low,
but also the current at suspend mode is less than 1μA.
The AK5371A includes 20dB fixed gain pre-amplifier. In
addition to this, as the AK5371A also incorporates IPGA
which can amplify the microphone signal up to +24dB, total
gain is 44dB maximum.
The AK5371A has EEPROM I/F for customizing Device
Descriptor and String Descriptor. By connecting 1K bit, 2K
bit, or 4Kbit Microwire
TM
type EEPROM, the AK5371A can
customize Vendor ID, Product ID in Device Descriptor, and
String Descriptor.
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
MS0546-E-00
MS0103-E-00
2007/02
1
AKM [ ASAHI KASEI MICROSYSTEMS ]
