Terra-BerryDAC3

Terra-BerryDAC3 AK4493 DAC part side RaspberryPi and Terra-BerryDAC3 AK4493 DAC with RaspberryPi AK4137 and AK4493

Small High quality RaspberryPi Audio DAC.

Feature

  • Raspberry Pi HAT compatible, GPIO I2S connection
  • AKM AK4493 DAC PCM:up to 768KH/32bitz, DSD up to 11.2MHz
  • Two low jitter Crystal oscillator for MCLK 45.158400MHz/49.152000MHz
  • Re-clocking and up sampling by AKM AK4137 SRC with onboard MCLK osillator
  • Onboard I2S DoP decoder by AK4137
  • Automatic MCLK selection by LRCLK frequency
  • Low noise High PSSR LDO AKM AK1110 for DAC analog power
  • Low-Noise Positive and Negative Output Integrated Charge Pump Plus LDO TI LM27762 for OPA1692
  • Low current noise, excellent linearity Metal Film (Thin Film) Chip Resistors ERA-2.
  • DC coupling output buffer AMP , Low noise、Low distortion SoundPlus. Audio OP-amp TI OPA1692
  • Balance / Unbalance output
  • DAC - AMP connection / separation Terminal
  • Independent DAC power input connector
  • Combo384 support
  • RaspberryPi GPIO serial port control.

Specification

ItemTerra-BerryDAC3
Main parts DAC: AK4493EQ
SRC: AK4137EQ
OP-AMP:OPA1692
I2S input PCM ～768KHz, DSD(I2S DoP) ～11.2MHz
SRC output(DAC input) PCM ：705.6KHz/32bit or 768KHz/32bit
DSD(DoP):DSD11.2MHz
Input RaspberryPi
Combo384
OutputUnbalance , Balance
Power supply+5V
Power consumptionTBDmA
Size65x56mm(RaspberryPi HAT compatible)

Description of Connectors

Terra-BerryDAC3 description
  1. External power input

    This terminal can supply power to DAC and RP individually.

    Terminal description
    1234
    RPi
    +5V    		RPi
    GND    		DAC
    GND    		DAC
    +5V
    Connector : JST B4B-PH-KS
  2. DAC-RaspberryPi power supply connection terminal

    When supplying DAC power from the GPIO pin of RaspberryPi, short this pins. (Default)

    When connecting separate power supplies from the external power connector to the DAC and RaspberryPi You must leave this terminal open.

    Terminal description
    1RaspberryPi +5V
    2DAC +5V
    Connector : MIL 2pin
  3. LCD power

    This connector can supply 5V power to LCDs for RaspberryPi. This connector is connected to the 5V terminal of RaspberryPi GPIO.

    Notice: The connector is not mounted, so you should solder the connector yourself.

    Terminal description
    12
    LCD +5VLCD GND
    Connector : JST B2B-ZH
  4. Audio signal output

    Terminal description
    [A] [B][B][B][B][A]
    GND(GND)R-GNDGNDL-(GND)GND
    R+(GND)R+GNDGNDL+(GND)L+
    [A] Unbalance terminal
    [B] Balance terminal
    Connector : MIL 8pin
    Notice: Balance terminal is not mounted. If you want to use you need to solder it.
  5. DAC output terminal

    This is for outputting a signal from the DAC output terminal. You can connect your original amplifier instead of the onboard amplifier.

    You can use a line transformer instead of an amplifier.

    DAC out to AMPin

    Terminal description
    Power
    +5V-5VGND
    		 R-ch
    DAC R+
    OUT    		DAC R-
    OUT
    AMP R+
    IN    		AMP R-
    IN
    		 L-ch
    DAC L-
    OUT    		DAC L+
    OUT
    AMP L-
    IN    		AMP L+
    IN
    Connector : MIL 3pin, 4pin, 4pin
    Notice: Power terminal is not mounted. If you want to use you need to solder it.
  6. GPIO connector

    This connector is connected to GPIO of Raspberrypi.

    It is assumed that a small LCD is connected via an operation button or I2C.

    Terminal description
    1234567
    +3.3VSCL1SDA1GPIO5GPIO6GNDGPIO12
    Connector : JST B7B-ZH
    Notice: The connector is not mounted, so you should solder the connector yourself.
  7. Operation panel terminal

    1. SW1：SRC operation mode setting pin
      • OFF：Automatic setting mode(Default)
      • ON：The SRC operating mode follows the SW2 setting.
    2. SW2：Switch the SRC output manually.
      • OFF:Output in PCM regardless of the input format.
      • ON：Output in DSD regardless of the input format.
    3. LED
      • LED1：DAC mode (SRC output mode) Auto=OFF、DAC mode manual=Light on
      • LED2：DAC mode PCM =OFF, DAC mode DSD=Light on
    Terminal description
    246810
    RSVGNDGNDLED2+LED1+
    RSVSW2SW1LED2-LED1-
    13579
    Connector : MIL 10pin

    SRC output format

    I2S input Output mode
    (DAC input mode)
    Auto setting
    (SW1=OFF)    		 PCM output
    (SW1=ON/SW2=OFF)    		 DSD output
    (SW1=ON/SW2=ON)
    PCM 32KHz PCM 768KHz PCM 768KHz OFF
    PCM 44.1KHz PCM 705.6KHz PCM 705.6KHz DSD 5.6MHz
    PCM 48KHz PCM 768KHz PCM 768KHz DSD 6.1MHz
    PCM 88.2KHz PCM 705.6KHz PCM 705.6KHz DSD 5.6MHz
    PCM 96KHz PCM 768KHz PCM 768KHz DSD 6.1MHz
    PCM 192KHz PCM 768KHz PCM 768Hz DSD 12.2MHz
    PCM 384KHz PCM 768KHz PCM 768KHz DSD 12.2MHz
    DSD 2.8MHz
    (DoP 176.4KHz)    		 DSD 11.2MHz N.A. DSD 11.2MHz
    DSD 5.6MHz
    (DoP 352.8KHz)    		 DSD 11.2MHz N.A. DSD 11.2MHz
    DXD 352.8KHz N.A. PCM 352.8KHz N.A.

    This spec depend on AK4137.

    System

    board connection

    * Combo384 connecter is not included.

    Network players

    Application RaspberryPi model
    Raspberry Pi B+ Raspberry Pi 2 B Raspberry Pi 3 B
    volumio-2 Unconfirmed PCM:Up to192KHz
    DSD:2.8MHz    		 PCM:Up to192KHz
    DSD:2.8MHz
    lightMPD-v1.0.2 PCM:Up to192KHz
    DSD:2.8MHz    		 PCM:Up to192KHz
    DSD:2.8MHz    		 --
    RuneAudio 0.3 PCM:Up to 192KHz
    DSD:2.8MHz    		 Unconfirmed Unconfirmed
    RuneAudio 0.4 Unconfirmed Unconfirmed PCM:Up to192KHz
    DSD:2.8MHz
    piCorePlayer 2.05 PCM:Up to192KHz Unconfirmed Unconfirmed
    modeaudio
    Release: 2.7    		 Unconfirmed PCM:Up to192KHz
    DSD:2.8MHz    		 Unconfirmed
    modeaudio
    Release: 3.1 2016-12-05
    Advanced kernel    		 Uunconfirmed PCM:Up to384KHz
    DSD:5.6MHz    		 PCM:Up to384KHz
    DSD:5.6MHz
    symphonic-mpd
    Version: 0.4.1    		 Uunconfirmed Uunconfirmed PCM:Up to352KHz
    DSD:5.6MHz
    *Pop noise will occur when DSD start play/stop, skip.

    Options

    • RCA pin jack adaptor 1

      RCA pin jack simple

    • RCA pin jack adaptor 2

      RCA pin jack 2