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參數(shù)資料
| 型號： | AK5371VQ |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | AB 5C 2#8 3#12 SKT WALL MT REC |
| 中文描述： | 2聲道的A / D轉換器的USB我/女 |
| 文件頁數(shù)： | 10/32頁 |
| 文件大小： | 256K |
| 代理商： | AK5371VQ |
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10
MS0103-E-00
MS0103-E-00
ASAHI KASEI
[AK 5371]
2001/06
Overview of AK5371
The AK5371 is the advanced stereo A/D converter, which converts analog signal into USB audio class formats. As the AK5371
incorporates all functions to build USB Audio Input Device, the AK5371 doesn’t require additional micro-controller, memory, and a
transceiver. Moreover, as the AK5371 also has 20dB fixed gain pre-amplifier in addition to programmable gain amplifier (IPGA)
whose range is from +24dB to –31dB, this device is suitable for USB microphone, especially microphone array. USB microphone
can be manufactured easily by only four main components; the AK5371, one crystal, one regulator, and microphone unit(s). As the
AK5371 also has EEPROM interface, descriptors can be customized easily. The AK5371 includes the following blocks:
1.
2 channel 16bit A/D converter
a)
84dBA@fs=44.1kHz
2.
Programmable Gain Amplifier (IPGA)
a)
Gain Range: from +24dB to -31dB,
b)
Gain Step: 1dB/step
3.
Fixed Gain Preamplifier
a)
20dB
4.
FIFO
Synchronization between A/D converter and USB bus
a)
Memory Size 400 bytes (16bit wide x 100 depth x 2 channel)
5.
PLL
a)
b)
11.2896MHz crystal
Two PLLs
-
A/D_PLL: generate clock for fs=8kHz, 48kHz
-
System_PLL : generate USB system clock
6.
Audio Format
a)
b)
supports 5 frequencies : 8kHz, 11.025kHz, 22.05kHz, 44.1kHz, 48kHz
2 audio formats
-
mono 16bit LSB first
-
stereo 16bit LSB first
7.
USB Serial Interface Engine
a)
Process USB Standard Requests
8.
Control block of Audio Device Class
a)
Translate internal A/D format to USB audio class format
b)
Process USB Audio Class Request
-
Mute
-
Gain/Attenuation
-
Sampling Frequency Control
9.
USB transceiver
10.
EEPROM I/F
Microwire
(4-wire) type EEPROM can be used to customize Device/String Descriptor.
-
1K bit (AK93C45A)
-
2K bit (AK93C55A)
-
4Kbit (AK93C65A)
11.
USB Suspend/Resume Support
The AK5371 supports 5 sampling frequencies (8kHz, 11.025kHz, 22.05kHz, 44.1kHz, 48kHz). In order to support these
frequencies, the AK5371 incorporates PLL, which generates system clock and master clock for fs=8kHz, and 48kHz
Mute, volume and audio format including sampling frequency are controlled by USB audio class request.
The AK5371 goes to suspend mode when the device doesn’t receive SOF for the period more than 3ms. All blocks including
master clock stop the function to observe USB specification, 500
μ
A , until receiving the resume signal. The AK5371 notifies the
current state (normal state or suspend state) by SUS_N pin.
As the AK5371 has Microwire
EEPROM I/F, the vendors can customize iManifacterer, iProduct, and the related strings to their
own ID, and string.
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| AK5383 | Circular Connector; No. of Contacts:8; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:16; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:16-8 RoHS Compliant: No |
相關代理商/技術參數(shù) |
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| AK5374ENP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
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