Datasheet DAC+ Pro
Datasheet DAC+ Pro
This is an archived documentation. It won't be updated anymore and it might not be accurate anymore.
The DAC+ Pro is not available anymore and has been superseded by the newer DAC2 Pro.
Overview
The HiFiBerry DAC+ Pro is a high-resolution digital-to-analog for the Raspberry Pi (newer models with 40 pin GPIO connector). This is a special sound card for the Raspberry Pi, optimised for one specific use case: the best audio playback
Facts
- Stereo output
- Dedicated 192kHz/24bit high-quality Burr-Brown DAC (5)
- Hardware volume control. You can control the output volume using “alsamixer” or any application that supports ALSA mixer controls.
- Connects directly to the Raspberry Pi, no additional cables needed
- No soldering, comes as a pre-fabricated kit. You just plug it onto the Raspberry Pi, it is conform to the Raspberry Pi hardware-attached-on-top (HAT) specification.
- Compatible with all Raspberry Pi models with a 40-pin GPIO connector
- Directly powered from the Raspberry Pi, no additional power supply
- Ultra-low-noise linear voltage regulator for optimal audio performance
- Low-jitter dual-domain clock for optimised clock decoupling from the Raspberry Pi (6)
- HAT compliant, EEPROM for automatic configuration
- Gold plated RCA output connectors
- Comes with all components required to mount it. We include 4 M2.5x12mm spacers to fix the board onto the Raspberry Pi
Hardware
Note that the actual board might look a bit different. Layout and components might change without further notice. We do not guarantee a specific PCB layout or specific components.
Connectors
| 1 | 5V (connected in parallel to Raspberry Pi 5V) |
| 2 | Analoge output |
| 3 | Analog output (in parallel to RCA jacks) |
| 4 | I2S data |
I2S connector
(pin 1 is the bottom pin on the picture above)
| 1 | GND |
| 2 | MCLK |
| 3 | BCLK |
| 4 | LRCLK |
| 5 | DATA |
Specifications
| Maximum output voltage | 2.1Vrms | |
| DAC signal-to-noise ratio | 112db | typical |
| DAC THD+N | -93db | typical |
| Frequency response | 10Hz-90kHz | (-3dB) |
| Input gain | -12db to 32dB | |
| Power consumption | <0.3W | |
| Sample rates | 44.1-192kHz |
Configuration
Overlay for config.txt:dtoverlay=hifiberry-dacplus
ALSA Mixer controls
Analog output gain (0dB/-6dB)Analogue
| Function | Control name |
|---|---|
| Volume control | Digital |
Media
