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參數(shù)資料
| 型號： | AK5370 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:6; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:16; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:16-6 RoHS Compliant: No |
| 中文描述： | 我的USB /英格蘭/ D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 8/27頁 |
| 文件大小： | 203K |
| 代理商： | AK5370 |
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ASAHI KASEI
[AK5370]
MS0027-E-00
8
2000/05
n
Overview of AK5370
The AK5370 is the advanced A/D converter, which converts analog signal of condenser microphone into USB audio class formats. This
device is suitable for USB microphone. The AK5370 includes the following blocks:
1.
AD converter
2.
Pre-Amplifier with variable gain/attenuation
3.
Serial Interface Engine
4.
Control block of Audio Device Class
Support Mute, Gain/Attenuation, Sampling Frequency Control, and AGC (only decode the request)
5.
USB transceiver
AK4170 compliant
6.
FIFO memory for bus synchronization
Memory Size (16bit wide x 100 depth)
7.
PLL
Synchronize Audio Stream data with USB bus I/F
The AK5370 supports 5 sampling frequencies (8kHz, 11.025kHz, 22.05kHz, 44.1kHz, 48kHz) mute control, volume control of Feature
Unit in Audio Device Class. In addition to this, as the AK5370 decodes the AGC request, and puts “H” or “L” level to the external pin,
AGC pin, it is easy to implement AGC with external circuit.
In order to support these frequencies, the AK5370 incorporates PLL. In addition to this, as the AK5370 consumes low power, it is
possible to operate as bus-powered device.
n
Class & Descriptor Overview
USB peripheral usually belongs to a group, “Class”. The AK5370 belongs to Audio Device Class. The Class consists of four
Descriptors, Device Descriptor, Configuration Descriptor, Interface Descriptor, and Endpoint Descriptor. The AK5370 has Audio
Specific Interface Descriptor and Endpoint Descriptor.
(1) Device Descriptor
Device Descriptor describes the product information; product name, manufacturer, etc. In addition to this, Device Descriptor has
Endpoint0 fifo-buffer size. At enumeration phase, host reads 8 bytes from the top of Device Descriptor at first. The host knows by
reading
bMaxPacketSize0
in the Device Descriptor, and uses this value for the following transactions, and does not send the bigger data
at once.
(2) Configuration Descriptor
Configuration Descriptor informs the host of the number of Interface, Bus-powered/Self-Powered device, etc.
This descriptor is the same as Standard Interface Descriptor.
(3) Interface Descriptor
There are two Interfaces in Audio Class; Audio Control (AC) Interface, and Audio Streaming (AS) Interface.
Each Audio Interface includes Standard Interface Descriptor and Class-Specific Interface.
Standard AC Interface Descriptor describes interface’s class.
Class-Specific AC Interface Descriptor is a concatenation of all the descriptors that are used to fully describe the audio function.
As the AK5370 has three logical audio functions; Input Terminal, Output Terminal, and Feature Unit (mute, volume, AGC), each
terminal and unit has their own Descriptor.
Not only each descriptor has their own information, but also has connection information between the blocks.
For example,
bSourceID
field in Output Terminal Descriptor is 0x03, which is ID of Feature Unit. This means that Feature Unit is
connected to Output Terminal.
Standard AS Interface has the interface class name (AUDIO) and sub-class name (AUDIO_STREAMING), the related Endpoint number,
etc.
Class-Specific AS Interface Descriptor mainly shows Audio Data Format information that follows as Descriptor.
There is a note for Alternate Setting:
Alternate setting 0 is a zero-bandwidth setting, used to relinquish the claimed bandwidth on the bus when the microphone is not in use. It
is the default setting after power-up. The zero bandwidth is implemented by specifying that this alternate setting of the interface has no
endpoints associated with it (bNumEndpoints=0).
(4) Endpoint Descriptor
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK5370VF | JT 6C 6#12 SKT GRND PLUG |
| AK5371A | 2ch A/D Converter with USB I/F |
| AK5371AVQ | 2ch A/D Converter with USB I/F |
| AK5371 | 2CH A/D CONVERTER WITH USB I/F |
| AK5371VQ | AB 5C 2#8 3#12 SKT WALL MT REC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK5370VF | 制造商:AKM 制造商全稱:AKM 功能描述:USB I/F A/D CONVERTER |
| AK5371 | 制造商:AKM 制造商全稱:AKM 功能描述:2CH A/D CONVERTER WITH USB I/F |
| AK5371A | 制造商:AKM 制造商全稱:AKM 功能描述:2ch A/D Converter with USB I/F |
| AK5371AVQ | 制造商:AKM 制造商全稱:AKM 功能描述:2ch A/D Converter with USB I/F |
| AK5371AVQP | 功能描述:IC ADC STER W/USB 16BIT 48LQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
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