uda1331h NXP Semiconductors, uda1331h Datasheet - Page 2

• Manufacturer Part Number: uda1331h
• Description: Universal Serial Bus Usb Audio Playback Peripheral App
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
General
Sound processing
1998 Oct 06
Universal Serial Bus (USB) stereo Audio Playback
Peripheral (APP) 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 I
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 I
Selectable clipping prevention
Selectable Dynamic Bass Boost (DBB)
On-chip digital de-emphasis.
Universal Serial Bus (USB) Audio
Playback Peripheral (APP)
2
C-bus.
2
S-bus or Japanese digital I/O format
2
Document references
APPLICATIONS
GENERAL DESCRIPTION
The UDA1331H is a stereo CMOS digital-to-analog
bitstream converter designed for USB-compliant audio
playback devices and multimedia audio applications.
The UDA1331H is an adaptive asynchronous sink USB
audio device with a continuous sampling frequency (f
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).
“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” .
USB monitors
USB speakers
USB headsets
USB telephone/answering machines
USB links in consumer audio devices.
Preliminary specification
UDA1331H
s
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