- 您現在的位置：買賣IC網 > PDF目錄382720 > UDA1325 (NXP Semiconductors N.V.) Universal Serial Bus USB CODEC PDF資料下載
參數資料
| 型號： | UDA1325 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | Codec |
| 英文描述： | Universal Serial Bus USB CODEC |
| 中文描述： | 通用串行總線解碼器 |
| 文件頁數： | 3/52頁 |
| 文件大小： | 310K |
| 代理商： | UDA1325 |
第1頁第2頁當前第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁
1999 May 10
3
Philips Semiconductors
Preliminary specification
Universal Serial Bus (USB) CODEC
UDA1325
APPLICATIONS
USB monitors
USB speakers
USB microphones
USB headsets
USB telephone/answering machines
USB links in consumer audio devices.
GENERAL DESCRIPTION
The UDA1325 is a single chip stereo USB codec
incorporating bitstream converters designed for
implementation in USB-compliant audio peripherals and
multimedia audio applications. It contains a USB interface,
an embedded microcontroller, an Analog-to-Digital
Interface (ADIF) and an Asynchronous Digital-to-Analog
Converter (ADAC).
The USB interface consists of an analog front-end and a
USB processor. The analog front-end transforms the
differential USB data into a digital data stream. The USB
processor buffers the incoming and outgoing data from the
analog front-end and handles all low-level USB protocols.
The USB processor selects the relevant data from the
universal serial bus, performs an extensive error detection
and separates control information and audio information.
The control information is made accessible to the
microcontroller. At playback, the audio information
becomes available at the digital I
2
S output of the digital I/O
module or is fed directly to the ADAC. At recording, the
audio information is delivered by the ADIF or by the digital
I
2
S input of the I
2
S-bus interface.
All I
2
S inputs and I
2
S outputs support standard I
2
S-bus
format and the LSB justified serial data format with word
lengths of 16, 18 and 20 bits.
Via the digital I/O module with its I
2
S input and output, an
external DSP can be used for adding extra sound
processing features for the audio playback channel.
The microcontroller is responsible for handling the
high-level USB protocols, translating the incoming control
requests and managing the user interface via general
purpose pins and an I
2
C-bus.
The ADAC enables the wide and continuous range of
playback sampling frequencies. By means of a Sample
Frequency Generator (SFG), the ADAC is able to
reconstruct the average sample frequency from the
incoming audio samples. The ADAC also performs the
playback sound processing. The ADAC consists of a
FIFO, an unique audio feature processing DSP, the SFG,
digital filters, a variable hold register, a Noise Shaper (NS)
and a Filter Stream DAC (FSDAC) with line output drivers.
The audio information is applied to the ADAC via the USB
processor or via the digital I
2
S input of the digital I/O
module.
The ADIF consists of an Programmable Gain Amplifier
(PGA), an Analog-to-Digital Converter (ADC) and a
Decimator Filter (DF). An Analog Phase Lock Loop (APLL)
or oscillator is used for creating the clock signal of the
ADIF. The clock frequency for the ADIF can be controlled
via the microcontroller. Several clock frequencies are
possible for sampling the analog input signal at different
sampling rates.
The wide dynamic range of the bitstream conversion
technique used in the UDA1325 for both the playback and
recording channel guarantees a high audio sound quality.
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
UDA1325PS
UDA1325H
SDIP42
QFP64
plastic shrink dual in-line package; 42 leads (600 mil)
plastic quad flat package; 64 leads (lead length 1.95 mm);
body 14
×
20
×
2.8 mm
SOT270-1
SOT319-2
相關PDF資料 |
PDF描述 |
|---|---|
| UDA1325H | Universal Serial Bus USB CODEC |
| UDA1325PS | Universal Serial Bus USB CODEC |
| UDA1326PS | USB AUDIO-CODEC(通用串行總線音頻編解碼器) |
| UDA1331H | Universal Serial Bus USB Audio Playback Peripheral APP |
| UDA1334BT | Low power audio DAC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| UDA1325H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus USB CODEC |
| UDA1325PS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus USB CODEC |
| UDA1328 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multi-channel filter DAC |
| UDA1328T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multi-channel filter DAC |
| UDA1330A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low-cost stereo filter DAC |
發布緊急采購，3分鐘左右您將得到回復。