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參數(shù)資料
| 型號： | 935261615118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| 封裝： | 7.50 MM, PLASTIC, SO-28 |
| 文件頁數(shù)： | 12/48頁 |
| 文件大?。?/td> | 356K |
| 代理商： | 935261615118 |
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1998 Oct 06
2
Philips Semiconductors
Preliminary specication
Universal Serial Bus (USB)
Digital-to-Analog Converter (DAC)
UDA1321
FEATURES
General
Universal Serial Bus (USB) stereo Digital-to-Analog
Converter (DAC) system with adaptive (5 to 55 kHz)
20-bits digital-to-analog conversion and filtering
USB-compliant audio and Human Interface Device
(HID)
Supports 12 Mbits/s full-speed serial data transmission
Supports multiple audio data formats (8, 16 and 24 bits)
Supports headphone and line output
Fully automatic ‘Plug-and-Play’ operation
High linearity
Wide dynamic range
Superior signal-to-noise ratio (typical 95 dB)
Low total harmonic distortion (typical 90 dB)
3.3 V power supply
Efficient power management
Low power consumption
On-chip master clock oscillator, only an external crystal
is required
Partly programmable USB descriptors and configuration
via I2C-bus.
Sound processing
Separate digital volume control for left and right channel
Soft mute
Digital bass and treble tone control
External Digital Sound Processor (DSP) option possible
via standard I2S-bus or Japanese digital I/O format
Selectable clipping prevention
Selectable Dynamic Bass Boost (DBB)
On-chip digital de-emphasis.
Document references
“USB Specification”
“USB Common Class Specification”
“USB Device Class Definition for Audio Devices”
“Device Class Definition for Human Interface Devices
(HID)”
“USB HID Usage Table”.
APPLICATIONS
USB monitors
USB speakers
USB headsets
USB telephone/answering machines
USB links in consumer audio devices.
GENERAL DESCRIPTION
The UDA1321 is a stereo CMOS digital-to-analog
bitstream converter designed for USB-compliant audio
playback devices and multimedia audio
applications.The UDA1321 is an adaptive asynchronous
sink USB audio device with a continuous sampling
frequency (fs) range from 5 to 55 kHz. It contains a USB
interface, an embedded microcontroller and an
Asynchronous Digital-to-Analog Converter (ADAC).
The USB interface is the interface between the USB, the
ADAC and the microcontroller. The USB interface consists
of an analog front-end and a USB processor. The analog
front-end transforms the differential USB data to a digital
data stream. The USB processor buffers the input and
output 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 (input and output) and audio information (input
only).
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