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PDF AK5371A Data sheet ( Hoja de datos )
| Número de pieza | AK5371A | |
| Descripción | 2ch A/D Converter | |
| Fabricantes | Asahi Kasei Microsystems | |
| Logotipo |  |
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[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
AK5371A
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 MicrowireTM 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-01
-1-
2008/11
1 page  
[AK5371A]
Absolute Maximum Rating
VSS1=VSS2=VSS3=0V
Parameter
Symbol
Min
Max
Power Supplies
Analog VSS3
-0.3
4.5
Digital VSS1
-0.3
4.5
Input Current (any pins except for supplies)
IIN
-
±10
Analog Input Voltage
VINA
-0.3
VA+0.3
Digital Input Voltage
VIND
-0.3
VD+0.3
Ambient Temperature
Ta 0
70
Storage Temperature
Tstg
-40
125
Note 1. All voltages with respect to ground. VSS1, VSS2 and VSS3 pin should be connected.
Units
V
V
mA
V
V
°C
°C
Warning: Operation at or beyond these limits may results in permanent damage to the device. Normal operation is
not guaranteed at these extremes.
Recommended Operating Condition
VSS1=VSS2=VSS3=0V
Parameter
Symbol
Min
Power Supplies
Analog
VA
3.0
Digital
VD
3.0
All voltages with respect to ground.
typ
3.3
3.3
Max
3.6
3.6
Units
V
V
* AKEMD assumes no responsibility for the usage beyond the condition in this datasheet.
MS0546-E-01
-5-
2008/11
5 Page 
[AK5371A]
■ Descriptor Overview
When the device is connected to USB bus, the host assigns specific address to the device. Then the host reads the device information,
which is called as descriptor, through default pipe (Endpoint 0). The AK5371A consists of one Device Descriptor, one Configuration
Descriptor, two Interface Descriptors, and two Endpoint Descriptors.
Figure 6 shows Descriptor’s hierarchy.
Device
Device
Descriptor
Configuration
Configuration
Descriptor
Standard Audio Control
Interface Descriptor
Class-Specific Audio Control
Interface Descriptor
Interface 0
Class-Specific Descriptor
StandardInterface Descriptor
Standard AS Interface
Descriptor Alt. Setting 0
Interface 1
Standard AS Interface
Descriptor Alt. Setting 1
Class-Specific Audio Streaming
Interface Descriptor
Class-Specific AS Format Type
Descriptor
Standard AS Interface
Descriptor Alt. Setting 2
Class-Specific Audio Streaming
Interface Descriptor
Class-Specific AS Format Type
Descriptor
Standard AS Isochronous
Endpoint Descriptor
Class-Specific AS Isochronous
Endpoint Descriptor
Figure 6. Descriptor Hierarchy
Standard AS Isochronous
Endpoint Descriptor
Class-Specific AS Isochronous
Endpoint Descriptor
Endpoint
(IN)
MS0546-E-01
- 11 -
2008/11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK5371A.PDF ] | |
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