DEM-PCM2906BEVM

Evaluation and Demonstration Boards and Kits are ideal for speeding up the evaluation of a product, or for validating a design. DEM-PCM2906BEVM from Texas Instruments is one of those boards that can be used for such purposes. This EVM (Evaluation Module) serves as a reference design for PCM2906B, a fully integrated mono Bridge-Tied Load (BTL) or single-ended (SE) Class-D audio amplifier with a USB digital audio interface. The device combines a Class D audio amplifier, a USB digital audio controller, and an integrated RC oscillator that together minimizes the number of external components required.

The DEM-PCM2906BEVM is capable of producing outputs from 2 W into 4 W at a 10% THD+N into a 4Ω speaker with a 5V supply. The USB is capable of 16-bit/32 kHz or 24-bit/48kHz resolutions.

The functionality of the board includes a switch-selectable Gain And Shutdown. This feature enables the user to configure the Class-D speaker amplifier to delivery either 4W into a 4Ohm speaker (Gain = 24 dB) or 2W (Gain = 18 dB). The board is shipped in the Gain = 24 dB mode. Also, the board configurations can be changed through several switches on the board for device testing and feature evaluation.

At the heart of the DEM-PCM2906BEVM is the PCM2906B Audio Codec. This device incorporates and SPDIF transmitter and a Class D speaker amplifier. The SPDIF transmitter component provides a PCM audio interface with one differential and two single-ended outputs. It has a USB audio controller, which provides power management, USB endpoint management, and audio sensing for flash-memory systems.

The operation of the DEM-PCM2906BEVM is based on the PCM2906B Audio Codec. The USB audio protocol layer supports 16-bit/32 kHz or 24-bit/48 kHz audio data, while the low-level audio protocol layer supports both I2S and DSP formats. The integrated USB digital audio controller provides PC compatibility through the Windows operating system. The device has a digital volume control that supports stereo, dual-mono, independent, and single-attenuation modes.

The PCM2906B Audio Codec processes incoming analog audio signals that are used to generate stereo outputs to drive an external stereo speaker. The integrated amplifier is capable of driving 2 W into 4 W into a 4Ohm load. The USB digital audio interface of the device enables the device to be connected directly to the USB port of a PC, making it highly portable and providing the flexibility to support different host platforms.

Overall, the Texas Instruments DEM-PCM2906BEVM is an ideal device for customers looking to quickly evaluate the PCM2906B Audio Codec. It is suitable for various audio applications such as notebook computers, PA systems, portable audio devices, and automotive audio systems. The device also reduces the cost and time associated with the evaluation and implementation process due to its low component count and simple design.