Adafruit I2S Stereo Decoder - UDA1334A Breakout
UDA1334A I2S stereo DAC breakout accepting 3.3 V or 5 V logic and multiple I2S data formats; outputs stereo analog line-level audio. Works without an MCLK signal (e.g., Raspberry Pi) via a built-in PLL that derives the clock from the bit clock.
Pinout
- VIN
Power input for the breakout regulator; Adafruit states 3-5V power can be provided on VIN.
Type · PowerVoltage · 3-5V input - GND
Ground reference for power and logic.
Type · GroundVoltage · 0V - 3VO
Regulated 3.3V output generated by the onboard regulator.
Type · PowerVoltage · 3.3V output - WSEL
I2S word select / left-right clock input; selects whether DIN carries left or right channel data.
Type · SignalVoltage · 3.3-5V logic - DIN
I2S serial data input carrying left and right audio data.
Type · SignalVoltage · 3.3-5V logic - BCLK
I2S bit clock input; tells the DAC when to read the data pin.
Type · SignalVoltage · 3.3-5V logic - AGND
Clean analogue ground reference for the line-level audio outputs.
Type · GroundVoltage · 0V analogue reference - Lout
Left line-level analogue audio output through onboard blocking capacitor.
Type · SignalVoltage · Line-level audio output - Rout
Right line-level analogue audio output through onboard blocking capacitor.
Type · SignalVoltage · Line-level audio output - SCLK
Optional 27 MHz system clock input for video mode; not required for normal audio-mode use.
Type · SPIVoltage · 3.3-5V safe per Adafruit optional-control note except PLL/SF0 - Mute
Optional mute control; setting this pin high mutes the output.
Type · SignalVoltage · 3.3-5V safe per Adafruit optional-control note except PLL/SF0 - De-Em
Optional de-emphasis control in audio mode.
Type · SignalVoltage · 3.3-5V safe per Adafruit optional-control note except PLL/SF0 - PLL
Optional PLL control pin; Adafruit states PLL is 3.3V logic only.
Type · SignalVoltage · 3.3V logic only - SF0
Optional format/control pin; Adafruit states SF0 is 3.3V logic only.
Type · SignalVoltage · 3.3V logic only
| Pin | Type | Function | Voltage |
|---|---|---|---|
| VIN | Power | Power input for the breakout regulator; Adafruit states 3-5V power can be provided on VIN. | 3-5V input |
| GND | Ground | Ground reference for power and logic. | 0V |
| 3VO | Power | Regulated 3.3V output generated by the onboard regulator. | 3.3V output |
| WSEL | Signal | I2S word select / left-right clock input; selects whether DIN carries left or right channel data. | 3.3-5V logic |
| DIN | Signal | I2S serial data input carrying left and right audio data. | 3.3-5V logic |
| BCLK | Signal | I2S bit clock input; tells the DAC when to read the data pin. | 3.3-5V logic |
| AGND | Ground | Clean analogue ground reference for the line-level audio outputs. | 0V analogue reference |
| Lout | Signal | Left line-level analogue audio output through onboard blocking capacitor. | Line-level audio output |
| Rout | Signal | Right line-level analogue audio output through onboard blocking capacitor. | Line-level audio output |
| SCLK | SPI | Optional 27 MHz system clock input for video mode; not required for normal audio-mode use. | 3.3-5V safe per Adafruit optional-control note except PLL/SF0 |
| Mute | Signal | Optional mute control; setting this pin high mutes the output. | 3.3-5V safe per Adafruit optional-control note except PLL/SF0 |
| De-Em | Signal | Optional de-emphasis control in audio mode. | 3.3-5V safe per Adafruit optional-control note except PLL/SF0 |
| PLL | Signal | Optional PLL control pin; Adafruit states PLL is 3.3V logic only. | 3.3V logic only |
| SF0 | Signal | Optional format/control pin; Adafruit states SF0 is 3.3V logic only. | 3.3V logic only |
Pin details
14 connections- VIN
Power input for the breakout regulator; Adafruit states 3-5V power can be provided on VIN.
PowerVoltage · 3-5V input - GND
Ground reference for power and logic.
GroundVoltage · 0V - 3VO
Regulated 3.3V output generated by the onboard regulator.
PowerVoltage · 3.3V output - WSEL
I2S word select / left-right clock input; selects whether DIN carries left or right channel data.
SignalVoltage · 3.3-5V logic - DIN
I2S serial data input carrying left and right audio data.
SignalVoltage · 3.3-5V logic - BCLK
I2S bit clock input; tells the DAC when to read the data pin.
SignalVoltage · 3.3-5V logic - AGND
Clean analogue ground reference for the line-level audio outputs.
GroundVoltage · 0V analogue reference - Lout
Left line-level analogue audio output through onboard blocking capacitor.
SignalVoltage · Line-level audio output - Rout
Right line-level analogue audio output through onboard blocking capacitor.
SignalVoltage · Line-level audio output - SCLK
Optional 27 MHz system clock input for video mode; not required for normal audio-mode use.
SPIVoltage · 3.3-5V safe per Adafruit optional-control note except PLL/SF0 - Mute
Optional mute control; setting this pin high mutes the output.
SignalVoltage · 3.3-5V safe per Adafruit optional-control note except PLL/SF0 - De-Em
Optional de-emphasis control in audio mode.
SignalVoltage · 3.3-5V safe per Adafruit optional-control note except PLL/SF0 - PLL
Optional PLL control pin; Adafruit states PLL is 3.3V logic only.
SignalVoltage · 3.3V logic only - SF0
Optional format/control pin; Adafruit states SF0 is 3.3V logic only.
SignalVoltage · 3.3V logic only
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