HiFiBerry DAC+ ADC Pro

The HiFiBerry DAC+ ADC Pro combines the well-known DAC+ Pro with an analogue input. Both input and output support sample rates up to 192kHz. It's is a high-resolution digital-to-analogue and analogue-to-digital converter for the Raspberry Pi (newer models with 40 pin GPIO connector). Note: This board will not fit inside the HighPi case range due to the headphone connector. The Pro model is an upgrade of the standard version with the following features

* Low-jitter dual-domain clock for optimised clock decoupling from the Raspberry Pi

* Mic bias voltage for the use with electret microphones

* No anti-aliasing filter in the input path for best recording bandwidth

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 applications that do not only need playback but also recording functionalities. 60W Class-D Amplifier add-on now available! Features

* Stereo input and output

* 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

* Three ultra-low-noise linear voltage regulators for optimal audio performance

* Pro: Low-jitter dual-domain clock for optimised clock decoupling from the Raspberry Pi

* Pro: Mic bias voltage for the use with electret microphones

* Pro: No anti-aliasing filter in the input path for best recording bandwidth

* 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

Specifications

Maximum input voltage 2.1Vrms 4.2Vrms for balanced input

Maximum output voltage 2.1Vrms

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

Balanced/un-balanced input connector J4

This 6-pin connector can be used to connect a balanced input (e.g. XLR or 6.5mm jacks). Pin 1 is on the left bottom corner.

in R- 1 2 in R+

GND 3 4 GND

in L+ 5 6 in L-

Output connector P5 This connector can be used to connect to external components, e.g. an amplifier. The output is connected in parallel to the RCA jacks. Pin 1 is on the top left.

+5V 1 2 R

GND 3 4 GND

+5V 5 6 L

Configuration To support the DAC+ ADC, a Raspberry Pi Linux kernel of at least version 4.19.60 is required. Have a look at the documentation on how to update the Linux kernel. Overlay for config.txt: dtoverlay=hifiberry-dacplusadcpro If you’re still using an older Linux kernel that does not support the DAC+ ADC, you can still use the output-part of the DAC+ ADC using the HiFiBerry DAC+ driver: dtoverlay=hifiberry-dacplus Resources

* Datasheet

* Updating the Linux kernel

* Use dynamic microphones

* 3D model (step)

Notes

* You may need to update your Linux kernel to support the audio input features (at least Raspberry Pi kernel 4.19.60)

* Note that the actual board received might look different from the images. Layout and components may change without notice. HiFiBerry does not guarantee a specific PCB layout or specific components.

Package Contents

* 1x HiFiBerry DAC+ ADC Pro