WT2605 has ADC and DAC peripherals with high signal-to-noise ratio, and the resolution is as high as 16bit. At the same time, it has standard UART, key control and other functions, and can store audio files by external USB flash, TF card, SPI Flash, etc. SPI Flash supports file management, and can realize file index playback, file name playback and other functions. Support standard MP3, WAV audio file playback and Bluetooth playback, and also decode and play audio files such as APE and FLAC (to be customized). Please refer to the scheme specification and schematic diagram for details.
External power supply current, without load
Application Circuit (Schematic)
Relevant requirements/specifications of Bluetooth circuit (including antenna):
It is recommended to adopt the standard package provided by Weichuang Zhiyin;
It is not allowed to walk at right angles with the antenna. If there is an inflection point in the design, please use circular arc connection.
The wiring and safety distance of the circuits around the Bluetooth chip should be more than 2mm as far as possible.
The distance from the Bluetooth chip to the antenna cannot exceed 1CM.
The Bluetooth chip should be isolated from the antenna by copper plating, and more than 1 row of vias should be added.
It is recommended to isolate the digital ground from the analog ground; Capacitors are required to be close to the periphery of several power supply pins.
When DACR and DACL are docked with the audio input port of power amplifier, analog ground should be used in parallel around the line to remove interference.
DACR and DACL should stay away from RF and heavy current power supply when wiring.