參數(shù)資料
型號(hào)： AK5371
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： 2CH A/D CONVERTER WITH USB I/F
中文描述： 2聲道的A / D轉(zhuǎn)換器的USB我/女
文件頁(yè)數(shù)： 10/32頁(yè)
文件大小： 256K
代理商： AK5371
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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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
AK5371VQ 制造商:AKM 制造商全稱:AKM 功能描述:2CH A/D CONVERTER WITH USB I/F
AK5373 制造商:AKM 制造商全稱:AKM 功能描述:24-bit Stereo ADC with USB Interface
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