UDA1325 Universal Serial Bus (USB) CODEC

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 IS 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 IS input of the IS-bus Interface All IS inputs and IS outputs support standard IS-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 IS 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 IC-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 IS 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.
By NXP Semiconductors
UDA1325 's PackagesUDA1325 's pdf datasheet



UDA1325 Pinout, Pinouts
UDA1325 pinout,Pin out
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