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AKM AK4686 Manual

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AKD4686-B is an evaluation board for AK4686, a single chip 24bit CODEC that has one stereo ADC and
two stereo DAC. This board has interfaces with AKM's evaluation boards for A/D converter and D/A
converter and makes easy to evaluate AK4686. Also this board has the digital audio interface and then
achieves the interface with digital audio systems via RCA connector.
Ordering guide
AKD4686-B --- Evaluation Board for AK4686
On-board clock generators (AK4118 x 2)
Compatible with 2 types of digital audio interface
- RCA (S/PDIF) input/output
- 10pin headers for interfacing with external data source (x2)
RCA connectors for clock input with external clock source
10pin header for register control
LOUT1/ROUT1
LOUT2/ROUT2
(* Circuit diagram and PCB layout are attached at the end of this manual.)
< KM103800>
FEATURE
(Cable for connecting with printer port of IBM-AT compatible PC and control
software are packed with this. This control software does not operate on Windows
NT.)
FUNCTION
GND
+5V
Regulator
AK4686
Figure 1. AKD4686-B Block Diagram
AK4686 Evaluation Board Rev.0
+3.3V
Control Data
10pin Header
LIN / RIN
- 1 -
[AKD4686-B]
AKD4686-B
EX2
AK4118
RCA IN
(DIR)
PORT 2
10pin Header
PORT 1
10pin Header
RCA OUT
AK4118
(DIT/DIR)
RCA IN
EX1
2010/08

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Summary of Contents for AKM AK4686

  • Page 1 AK4686 Evaluation Board Rev.0 FEATURE AKD4686-B is an evaluation board for AK4686, a single chip 24bit CODEC that has one stereo ADC and two stereo DAC. This board has interfaces with AKM’s evaluation boards for A/D converter and D/A converter and makes easy to evaluate AK4686. Also this board has the digital audio interface and then achieves the interface with digital audio systems via RCA connector.

  • Page 2: Evaluation Board Manual

    3. Connect cables. (Refer to the following item.) 4. Power on. The AK4686 (U1) should be reset once bringing SW1 (PDN) “L” upon power-up. Keep “H” during normal operaion. 5. Set up control software registers. (Refer to the following item.) <...
  • Page 3 [AKD4686-B] Evaluation modes (1) DAC with external DIR (Synchronous mode) 1. Connection of connector For digital (S/PDIF) input, RCA connectors J12 (PORT1 RX0) and J15 (PORT2 RX0) are available. For analog output, RCA connectors J5 (LOUT1)/JP6 (ROUT1), J7 (LOUT2)/J8 (ROUT2) are available. 2.
  • Page 4 [AKD4686-B] (2) DAC with external DIR (Asynchronous mode) 1. Connection of connector For digital (S/PDIF) input, RCA connectors J12 (PORT1 RX0) and J15 (PORT2 RX0) are available. For analog output, RCA connectors J5 (LOUT1)/JP6 (ROUT1), J7 (LOUT2)/J8 (ROUT2) are available. 2.
  • Page 5 [AKD4686-B] (3) ADC with external DIT 1. Connection of connector For analog input, RCA connector JL1(LIN1), JL2(LIN2), JL3(LIN3), JL4(LIN4), JL5(LIN5), JL6(LIN6) and JR1(RIN1), JR2(RIN2), JR3(RIN3), JR4(RIN4), JR5(RIN5), JR6(RIN6) are available. For digital (S/PDIF) output, RCA connector J13 (PORT1 TX1) is available. 2.
  • Page 6 SW4-4 (Refer Table 17.) SW4-6 OCKS0 Selection of AK4118 Master Clock Output frequency (Refer Table 18.) SW4-7 OCKS1 Table 15. Set up modes of AK4118 (U4, U7) and AK4686 (U1) LRCK BICK Mode DIF2 DIF1 DIF0 DAUX SDTO 24bit, Left justified...

  • Page 7: Toggle Switch

    [SW1] PDN: A switch for power down reset of AK4686 (U1). Keep “H” during operation of AK4686 (U1). Power down reset of AK4686 will be done by setting SW1 to “L” once, after power on. [SW2] AK4118 (U4)-PDN: A switch for power down reset of AK4118 (U4). Keep “H” during operation of AK4118 (U4).

  • Page 8: Analog Input Circuit

    [AKD4686-B] Analog Input Circuit LIN1 (short) LIN4 LIN1 LIN4 (short) VSS1 MR-552LS MR-552LS VSS1 RIN1 RIN4 (short) RIN1 RIN4 (short) VSS1 MR-552LS MR-552LS VSS1 LIN2 LIN5 (short) LIN2 LIN5 (short) VSS1 MR-552LS MR-552LS VSS1 RIN5 RIN2 (short) RIN5 RIN2 (short) VSS1 MR-552LS MR-552LS...

  • Page 9: Analog Output Circuit

    [AKD4686-B] Analog Output Circuit (short) (short) LOUT1 LOUT1 (open) (open) MR-552LS VSS2 VSS2 VSS2 (short) (short) ROUT1 ROUT1 (open) (open) MR-552LS VSS2 VSS2 VSS2 (short) (short) LOUT2 LOUT2 (open) (open) MR-552LS VSS2 VSS2 VSS2 (short) (short) ROUT2 ROUT2 (open) (open) MR-552LS VSS2 VSS2...
  • Page 10 [AKD4686-B] Digital Input Circuit (External DIR: PORT1 RX0, PORT2 RX0) PORT1 RX0 PORT2 RX0 0.1u 0.1u MR-552LS MR-552LS DGND DGND DGND DGND Figure 5. Digital Input Circuit (External DIR) For digital input, RCA connector: J12 (PORT1 RX0), J15 (PORT2 RX0) are available. Digital Output Circuit (External DIT: PORT1 TX1) PORT1 TX1 DA02F...

  • Page 11: Control Soft Manual

    10pin header. When running this control soft on the Windows 2000/XP, the driver which is included in the CD must be installed. Refer to the “Driver Control Install Manual for AKM Device Control Software” for installing the driver. When running this control soft on the windows 95/98/ME, driver installing is not necessary. This control soft does not support the Windows NT.
  • Page 12 [AKD4686-B] ■ Operation Overview Function, register map and testing tool can be controlled by this control soft. These controls are selected by upper tabs. Buttons which are frequently used such as register initializing button “Write Default”, are located outside of the switching tab window.
  • Page 13 [AKD4686-B] ■ Tab Functions 1. [REG 0H〜5H]: Register Map This tab is for a register writing and reading. Each bit on the register map is a push-button switch. Button Down indicates “H” or “1” and the bit name is in red (when read only it is in deep red). Button Up indicates “L”...
  • Page 14 [AKD4686-B] [Write]: Data Writing Dialog It is for when changing two or more bits on the same address at the same time. Click [Write] button located on the right of the each corresponded address for a pop-up dialog box. When checking the checkbox, the register will be “H” or “1”, when not checking the register will be “L” or ”0”. Click [OK] to write setting value to the registers, or click [Cancel] to cancel this setting.

  • Page 15: Tool]: Testing Tools

    [AKD4686-B] 2. [Tool]: Testing Tools This tab screen is for evaluation testing tool. Click buttons for each testing tool. < KM103800> 2010/08 - 15 -...

  • Page 16: Dialog Boxes

    [AKD4686-B] ■ Dialog Boxes 1. [All Req Write]: All Req Write dialog box Click [All Reg Write] button in the main window to open register setting files. Register setting files saved by [SAVE] button can be applied. [Open (left)]: Selecting a register setting file (*.akr). [Write]: Executing register writing.
  • Page 17 [AKD4686-B] 2. [Data R/W]: Data R/W Dialog Box Click the [Data R/W] button in the main window for data read/write dialog box. Data write is available to specified address. Address Box: Input data address in hexadecimal numbers for data writing. Data Box: Input data in hexadecimal numbers.

  • Page 18: Sequence Setting

    [AKD4686-B] 3. [Sequence]: Sequence Dialog Box Click [Sequence] button to open register sequence setting dialog box. Register sequence can be set in this dialog box. Sequence Setting Set register sequence by following process bellow. (1)Select a command Use [Select] pull-down box to choose commands. Corresponding boxes will be valid.
  • Page 19 [AKD4686-B] [ Interval ]: Interval time Valid boxes for each process command are shown bellow. · No_use: None · Register: [Address], [Data], [Interval] · Reg(Mask): [Address], [Data], [Mask], [Interval] · Interval: [Interval] · Stop: None · End: None < KM103800> 2010/08 - 19 -...

  • Page 20: Control Buttons

    [AKD4686-B] Control Buttons The function of Control Button is shown bellow. [Start]: Executing the sequence [Help]: Opening a help window [Save]: Saving sequence settings as a file. The file name is “*.aks”. [Open]: Opening a sequence setting file “*.aks”. [Close]: Closing the dialog box and finish the process. Stop of the sequence When “Stop”...
  • Page 21 [AKD4686-B] 4. [Sequence(File)]: Sequence Setting File Dialog Box Click [Sequence(File)] button to open sequence setting file dialog box. Those files saved in the “Sequence setting dialog” can be applied in this dialog. [Open (left)]: Opening a sequence setting file (*.aks). [Start]: Executing the sequence setting.
  • Page 22 [AKD4686-B] Measure Result 1) ADC part [Measurement condition] • Measurement unit : Audio Precision SYS-2722 • MCLK : 512fs • BICK : 64fs • fs : 48kHz • BW : 20Hz∼20kHz (fs=48kHz) • Bit : 24bit • Power Supply : AVDD1=AVDD2=DVDD=CVDD=3.3V •...
  • Page 23 [AKD4686-B] 2) DAC part [Measurement condition] • Measurement unit : Audio Precision SYS-2722 • MCLK : 512fs (fs=48kHz), 256fs (fs=96kHz), 128fs (fs=192kHz) • BICK : 64fs • fs : 48kHz, 96kHz, 192kHz • BW : 20Hz∼20kHz (fs=48kHz), 20Hz∼40kHz (fs=96kHz), 20Hz∼40kHz (fs=192kHz) •...
  • Page 24 [AKD4686-B] 1.ADC部 (fs=48kHz) -100 -110 -120 -130 -140 Figure 7. FFT (Input Frequency =1kHz, Input Level=-1dBFS) -100 -110 -120 -130 -140 Figure 8. FFT(Input Frequency =1kHz, Input Level=-60dBFS) < KM103800> 2010/08 - 24 -...
  • Page 25 [AKD4686-B] -100 -110 -120 -130 -140 Figure 9. FFT(noise floor) -100 -105 -110 -115 -120 -140 -120 -100 Figure 10. THD + N vs Input Level (Input Frequency =1kHz) < KM103800> 2010/08 - 25 -...
  • Page 26 [AKD4686-B] -100 -105 -110 -115 -120 Figure 11. THD + N vs Input Frequency (Input Level=-1.0dBFS) -100 -110 -120 -130 -140 -140 -130 -120 -110 -100 Figure 12. Linearity (Input Frequency =1kHz) < KM103800> 2010/08 - 26 -...
  • Page 27 [AKD4686-B] -0.2 -0.4 -0.6 -0.8 -1.2 -1.4 -1.6 -1.8 Figure 13. Frequency Response (Input Level=-1.0dBFS) T T T T -100 -110 -120 -130 -140 Figure 14. Crosstalk (Input Level=-1.0dBFS) < KM103800> 2010/08 - 27 -...
  • Page 28 [AKD4686-B] 2.DAC部 (DAC fs=48kHz) -100 -110 -120 -130 -140 Figure 15. FFT(Input Frequency =1kHz, Input Level=0dBFS) -100 -110 -120 -130 -140 Figure 16. FFT(Input Frequency =1kHz, Input Level=-60dBFS) < KM103800> 2010/08 - 28 -...
  • Page 29 [AKD4686-B] (DAC fs=48kHz) -100 -110 -120 -130 -140 Figure 17. FFT(noise floor) -100 -110 -120 -130 -140 100k Figure 18. FFT(out-of-band noise) < KM103800> 2010/08 - 29 -...
  • Page 30 [AKD4686-B] (DAC fs=48kHz) -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 19. THD+N vs Input Level (Input Frequency =1kHz) -100 -105 -110 -115 -120 Figure 20. THD+N vs Input Frequency (Input Level=0dBFS) < KM103800> 2010/08 - 30 -...
  • Page 31 [AKD4686-B] (DAC fs=48kHz) -100 -110 -120 -130 -140 -140 -130 -120 -110 -100 dBFS Figure 21. Linearity (Input Frequency =1kHz) +0.8 +0.6 +0.4 +0.2 -0.2 -0.4 -0.6 -0.8 Figure 22. Frequency Response (Input Level=0dBFS) < KM103800> 2010/08 - 31 -...
  • Page 32 [AKD4686-B] (DAC fs=48kHz) -100 -110 -120 -130 -140 Figure 23. Cross-talk (Input Level=0dBFS) < KM103800> 2010/08 - 32 -...
  • Page 33 [AKD4686-B] (DAC fs=96kHz) -100 -110 -120 -130 -140 Figure 24. FFT(Input Frequency =1kHz, Input Level=0dBFS) -100 -110 -120 -130 -140 Figure 25. FFT(Input Frequency =1kHz, Input Level=-60dBFS) < KM103800> 2010/08 - 33 -...
  • Page 34 [AKD4686-B] (DAC fs=96kHz) -100 -110 -120 -130 -140 Figure 26. FFT(noise floor) -100 -110 -120 -130 -140 100k Figure 27. FFT (Out of band Noise) < KM103800> 2010/08 - 34 -...
  • Page 35 [AKD4686-B] (DAC fs=96kHz) -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 28. THD+N vs Input Level (Input Frequency =1kHz) -100 -105 -110 -115 -120 Figure 29. THD+N vs fin (Input Level=0dBFS) < KM103800> 2010/08 - 35 -...
  • Page 36 [AKD4686-B] (DAC fs=96kHz) -100 -110 -120 -130 -140 -140 -130 -120 -110 -100 dBFS Figure 30. Linearity (Input Frequency =1kHz) +0.8 +0.6 +0.4 +0.2 -0.2 -0.4 -0.6 -0.8 Figure 31. Frequency Response (Input Level=0dBFS) < KM103800> 2010/08 - 36 -...
  • Page 37 [AKD4686-B] (DAC fs=96kHz) -100 -110 -120 -130 -140 Figure 32. Cross-talk (Input Level=0dBFS) < KM103800> 2010/08 - 37 -...
  • Page 38 [AKD4686-B] (DAC fs=192kHz) -100 -110 -120 -130 -140 Figure 33. FFT(Input Frequency =1kHz, Input Level=0dBFS) -100 -110 -120 -130 -140 Figure 34. FFT(Input Frequency =1kHz, Input Level=-60dBFS) < KM103800> 2010/08 - 38 -...
  • Page 39 [AKD4686-B] (DAC fs=192kHz) -100 -110 -120 -130 -140 Figure 35. FFT(noise floor) -100 -110 -120 -130 -140 100k Figure 36. FFT (Out of band Noise) < KM103800> 2010/08 - 39 -...
  • Page 40 [AKD4686-B] (DAC fs=192kHz) -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 37. THD+N vs Input Level (Input Frequency =1kHz) -100 -105 -110 -115 -120 Figure 38. THD+N vs Input Frequency (Input Level=0dBFS) < KM103800> 2010/08 - 40 -...
  • Page 41 [AKD4686-B] (DAC fs=192kHz) -100 -110 -120 -130 -140 -140 -130 -120 -110 -100 dBFS Figure 39. Linearity (f Input Frequency =1kHz) +0.8 +0.6 +0.4 +0.2 -0.2 -0.4 -0.6 -0.8 Figure 40. Frequency Response (Input Level=0dBFS) < KM103800> 2010/08 - 41 -...
  • Page 42 [AKD4686-B] (DAC fs=192kHz) -100 -110 -120 -130 -140 Figure 41. Cross-talk (Input Level=0dBFS) < KM103800> 2010/08 - 42 -...

  • Page 43: Revision History

    AKM harmless from any and all claims arising from the use of said product in the absence of such notification.
  • Page 44 MCLK1 ROUT1 MCLK1 ROUT1 MT1N MT1N TP15 TP15 LOUT1 LOUT1 MT1N LOUT1 MT1N LOUT1 DVDD DVDD TP14 TP14 VSS1 VSS1 AK4686 AK4686 DVDD DVDD VSS1 0.1u 0.1u VSS1 VSS4 VSS4 TP13 TP13 AVDD1 AVDD1 0.1u 0.1u VSS4 AVDD1 VSS4 AVDD1...
  • Page 45 LIN1 LIN4 (short) (short) LIN4 LIN1 (short) (short) VSS1 MR-552LS MR-552LS MR-552LS MR-552LS VSS1 RIN4 RIN1 (short) (short) RIN4 RIN1 (short) (short) MR-552LS MR-552LS VSS1 MR-552LS MR-552LS VSS1 LIN5 LIN2 (short) (short) LIN5 LIN2 (short) (short) VSS1 MR-552LS MR-552LS MR-552LS MR-552LS VSS1 RIN5...
  • Page 46 D3.3V 74LS07 74LS07 74LS07 74LS07 PORT3 PORT3 A1-10PA-2.54DSA A1-10PA-2.54DSA SDA(ACK) (short) (short) uP-I/F DGND D3.3V D3.3V D3.3V DGND 0.1u 0.1u 1S1588 1S1588 1S1588 1S1588 MT1N 74HC14 74HC14 74HC14 74HC14 74HC14 74HC14 74HC14 74HC14 ATE1D-2M3 ATE1D-2M3 0.1u 0.1u DGND ATE1D-2M3 ATE1D-2M3 0.1u 0.1u MT1N...
  • Page 47 DGND D3.3V PORT1 RX0 D3.3V 0.1u 0.1u 0.1u 0.1u MR-552LS MR-552LS HSU119 HSU119 DGND DGND DGND 0.47u 0.47u 74HC14 74HC14 74HC14 74HC14 D3.3V 0.1u 0.1u ATE1D-2M3 ATE1D-2M3 DIF0 PORT1 PDN DIF1 DIF2 LED1 LED1 OCKS0 D3.3V IPS0 INT0 OCKS1 DGND 74HC04 74HC04 PORT1 DIT/DIR/4686...
  • Page 48 DGND D3.3V PORT2_RX0 D3.3V 0.1u 0.1u 0.1u 0.1u MR-552LS MR-552LS HSU119 HSU119 DGND DGND DGND 0.47u 0.47u 74HC14 74HC14 D3.3V 74HC14 74HC14 0.1u 0.1u ATE1D-2M3 ATE1D-2M3 DIF0 PORT2 PDN DIF1 DIF2 LED2 LED2 D3.3V IPS0 INT0 OCKS0 74HC04 74HC04 OCKS1 DGND OCKS0 PORT2 OCKS0...
  • Page 49 +5V1 +5V1 DVDD1 DVDD1 CVDD1 CVDD1 AVDD1 AVDD1 AVDD2 AVDD2 D3.3V1 D3.3V1 T-45(O) T-45(O) T-45(O) T-45(O) T-45(O) T-45(O) T-45(O) T-45(O) T-45(O) T-45(O) T-45(O) T-45(O) TM_+5V TM_DVDD TM_AVDD1 TM_AVDD2 TM_CVDD TM_D3.3V LM1117-3.3V LM1117-3.3V LM1117-3.3V LM1117-3.3V TM_+5V TM_+5V VSS1 VSS1 VSS2 VSS2 VSS3 VSS3 VSS4...
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