UDA1331H 데이터 시트보기 (PDF) - Philips Electronics

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UDA1331H

Universal Serial Bus (USB) Audio Playback Peripheral (APP)

Philips Electronics 

Philips Semiconductors

Universal Serial Bus (USB) Audio

Playback Peripheral (APP)

Preliminary specification

UDA1331H

FEATURES

General

• 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 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 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 (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).

1998 Oct 06

2

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