Datasheet DAC+ ADC Stage
Datasheet DAC+ ADC Stage
Overview
The HiFiBerry DAC+ ADC Stage is a high-resolution digital-to-analog and analog-to-digital converter 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 and recording quality. It is specifically designed for OEM applications that require flexible configuration options.
The board can be customise for your specific needs using additional I/O boards
Please note that this board isn’t available to end users. If you’re a business customer, please contact us to discuss your specific needs.
Facts
- Stereo input and output
- Fully balanced inputs and outputs via extension header
- Dedicated 192kHz/24bit high-quality Burr-Brown DAC
- Dedicated 192kHz/24bit high-quality Burr-Brown ADC
- Hardware volume control for DAC and ADC. You can control the input and output parameters 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.
- Compatible with all Raspberry Pi models with a 40-pin GPIO connector
- Directly powered from the Raspberry Pi, no additional power supply. Power supply via I/O board possible if Pi’s power jack isn’t expose to the outside of your enclosure
- Three ultra-low-noise linear voltage regulators for optimal audio performance
- Low-jitter dual-domain clock for optimised clock decoupling from the Raspberry Pi
- Mic bias voltage for the use with electret microphones, 48V microphone power supply available via I/O board
- No anti-aliasing filter in the input path for best recording bandwidth
- Gold plated RCA output connectors (onboard-connectors can be removed on your request)
Hardware
Specifications
| Maximum input voltage | 2.1Vrms | 4.2Vrms for balanced input |
| Maximum output voltage | 2.1Vrms | 4.2Vrms for balanced output |
| ADC signal-to-noise ratio | 110db | typical |
| DAC signal-to-noise ratio | 112db | typical |
| ADC THD+N | -90db | typical |
| DAC THD+N | -93db | typical |
| Frequency response | 10Hz-70kHz | (-3dB) |
| Input gain | -12db to 32dB | |
| Power consumption | <0.3W | |
| Sample rates | 44.1-192kHz |
Configuration
To support the DAC+ ADC Stage, a Raspberry Pi Linux kernel of at least version 4.19.60 is required. Have a look at the documentation how to update the Linux kernel.
Overlay for config.txt:dtoverlay=hifiberry-dacplusadcpro
Media
Additional documentation
Note that this board is not available to the general public. If you’re an OEM that requires a large number of these boards, please contact us.