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AKM AKD4688-A Manual

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AKD4688-A is an evaluation board for AK4688, which is a single chip 24bit CODEC with a 2ch ADC and
a 2ch DAC. It is possible to evaluate not only A/D and D/A of the AK4688, but also asynchronous
operation characteristics. Also, the board could be connected to a digital's audio equipment easily with
S/PDIF connectors.
 Ordering guide
AKD4688-A ---
 Compatible with 2 types of digital audio interface
- Optical (S/PDIF) input/output with DIT/DIR (AK4118A)
- 10pin headers for interfacing with external data source
 Separate power supply or regulator power supply
 10pin header for register control
+5V
REG
AVDD2
AVSS2
AVSS1
AVDD1
* Circuit diagram and PCB layout are attached at the end of this manual.
<KM109900>
GENERAL DESCRIPTION
Evaluation board for AK4688
(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.)
VSS3
LOUT ROUT
AK4687
RIN3
LIN3 RIN2 LIN2 RIN1LIN1
Figure 1. AKD4688 Block Diagram
Evaluation board Rev.0 for AK4688
FUNCTION
DVDD
AK4688
- 1 -
[AKD4688-A]
AKD4688-A
AK4118A
(DIR)
Digital Input
PORT 6
10pin Header
PORT4
10pin Header
AK4118A
Digital Output
(DIT)
Control Data
10pin Header
2011/12

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Summary of Contents for AKM AKD4688-A

  • Page 1 GENERAL DESCRIPTION AKD4688-A is an evaluation board for AK4688, which is a single chip 24bit CODEC with a 2ch ADC and a 2ch DAC. It is possible to evaluate not only A/D and D/A of the AK4688, but also asynchronous operation characteristics.
  • Page 2 4688 Mode AKD4688-A Rev.0 Evaluation Board Asahi Kasei Microdevices Corporation Figure 2. AKD4688-A Outline Chart  Comment (1) J1, J2, J3, J4, J5, J6, J7, J8, J10, J11 (RCA JACKS) J1(white): Analog signal input RCA-Jacks. The signals are input to LIN1 pin.
  • Page 3 [AKD4688-A]  Operation sequence 1) Set up the power supply lines. 1-1) When AVDD1, AVDD2, DVDD and D3.3V are supplied from the regulator. <Default> Set up the jumper pins. JP16 AVDD1_SEL AVDD2_SEL D3.3V_SEL AVDD1 D3.3V AVDD2 Set up the power supply lines.
  • Page 4 [AKD4688-A] 2) Set up the evaluation mode, jumper pins and DIP switches. (See the followings.) 3) Power on. AK4688 and AK4118A should be reset once bringing SW1, SW2, SW3, SW5 “L” upon power-up.  Evaluation mode In case of AK4688 evaluation by using AK4118A, it is necessary to correspond to audio interface format for AK4688 and AK4118A.
  • Page 5 [AKD4688-A] (1) Evaluation of A/D and D/A by using DIR/DIT a) Set up of A/D J10 TX (RCA-Jack) or PORT3 (Optical connector) is used. Nothing should be connected to PORT4. MCLK1_SEL LRCK1_SEL BICK1_SEL SDTO BICK1 MCLK2 MCLK1 LRCK2 LRCK1 BICK2 b) Set up of D/A J11 RX (RCA-Jack) or PORT5 (Optical connector) is used.
  • Page 6 [AKD4688-A]  DIP Switch set up [SW4] (4688 Mode): Mode settings of AK4688 Name OFF (“L”) ON (“H”) Default H/W Control I2C Control AIN1 Analog Input Selector Control (I2C = “L” ) (Refer to Table 7) AIN0 ADC Slave Mode ADC Master Mode CAD Address pin Control (I2C = “H”...
  • Page 7 [AKD4688-A]  Other jumper pins set up 1. JP1 (GND) OPEN : Analog ground and digital ground are separated. SHORT : Analog ground and digital ground are shorted. <Default> 2. JP1 (SCL/AIN0) : Select I2C control mode. AIN0 : Select H/W control mode. < Default >...
  • Page 8 [AKD4688-A]  Serial Control The AK4688 can be controlled via the printer port (parallel port) of IBM-AT compatible PC. Connect PORT1 (CTRL) with PC by 10 wire flat cable packed with the AKD4688-A PORT1 10 wire CTRL flat Cable Connect...
  • Page 9 [AKD4688-A]  Analog Input/Output Circuits (1) Input Circuits RIN1 LIN1 RIN1 LIN1 MR-552LS MR-552LS AVSS1 AVSS1 Figure 4. Analog Input Circuit (2) Output Circuits LOUT LOUT 2.2n (OPEN) (OPEN) MR-552LS AVSS2 AVSS2 AVSS2 AVSS2 ROUT ROUT 2.2n (OPEN) (OPEN) MR-552LS...
  • Page 10 10pin header. Before running this control soft on Windows 2000/XP, the driver included in the CD must be installed. Refer to the “Driver Control Install Manual for AKM Device Control Software” for installation of the driver. When running this control soft on Windows 95/98/ME or via an AKDUSBIF-B interface board, driver installing is not necessary.
  • Page 11 [AKD4688-A] ■ Operation Overview 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 12 [AKD4688-A] ■ Tab Functions 1. [REG 0H～5H]: Register Map This tab is for 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).
  • Page 13 [AKD4688-A] [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”.
  • Page 14 [AKD4688-A] 2. [Tool]: Testing Tools This tab screen is for evaluation testing tool. Click buttons for each testing tool. <KM109900> 2011/12 - 14 -...
  • Page 15 [AKD4688-A] ■ 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).
  • Page 16 [AKD4688-A] 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.
  • Page 17 [AKD4688-A] 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.
  • Page 18 [AKD4688-A] [ 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 <KM109900> 2011/12...
  • Page 19 [AKD4688-A] 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.
  • Page 20 [AKD4688-A] 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).
  • Page 21 [AKD4688-A] MEASUREMENT RESULTS 1. ADC part [Measurement condition]  Measurement unit : Audio Precision SYS-2722  MCLK : 256fs  BICK : 64fs  fs : 48kHz  BW : 20Hz20kHz (fs=48kHz)  Bit : 24bit  Power Supply : AVDD1=AVDD2=DVDD=3.3V ...
  • Page 22 [AKD4688-A] 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 23 [AKD4688-A] 1. ADC部 -100 -110 -120 -130 -140 Figure 6. FFT (Input Frequency =1kHz, Input Level=-1dBFS) -100 -110 -120 -130 -140 Figure 7. FFT(Input Frequency =1kHz, Input Level=-60dBFS) <KM109900> 2011/12 - 23 -...
  • Page 24 [AKD4688-A] -100 -110 -120 -130 -140 Figure 8. FFT(noise floor) -100 -105 -110 -115 -120 -125 -130 -135 -140 -120 -110 -100 Figure 9. THD + N vs Input Level (Input Frequency =1kHz) <KM109900> 2011/12 - 24 -...
  • Page 25 [AKD4688-A] -100 -105 -110 -115 -120 -125 -130 -135 -140 Figure 10. THD + N vs Input Frequency (Input Level=-1.0dBFS) -100 -110 -120 -130 -140 -140 -130 -120 -110 -100 Figure 11. Linearity (Input Frequency =1kHz) <KM109900> 2011/12 - 25 -...
  • Page 26 [AKD4688-A] -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1.1 -1.2 -1.3 -1.4 -1.5 -1.6 -1.7 -1.8 -1.9 Figure 12. Frequency Response (Input Level=-1.0dBFS) -100 -105 -110 -115 -120 -125 -130 -135 -140 Figure 13. Crosstalk (Input Level=-1.0dBFS) <KM109900>...
  • Page 27 [AKD4688-A] 2-1. DAC部(fs=48kHz) -100 -110 -120 -130 -140 Figure 14. FFT(Input Frequency =1kHz, Input Level=0dBFS) -100 -110 -120 -130 -140 Figure 15. FFT(Input Frequency =1kHz, Input Level=-60dBFS) <KM109900> 2011/12 - 27 -...
  • Page 28 [AKD4688-A] -100 -110 -120 -130 -140 Figure 16. FFT(noise floor) -100 -110 -120 -130 -140 100k Figure 17. FFT(out-of-band noise) <KM109900> 2011/12 - 28 -...
  • Page 29 [AKD4688-A] -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 18. THD+N vs Input Level (Input Frequency =1kHz) -100 -105 -110 -115 -120 Figure 19. THD+N vs Input Frequency (Input Level=0dBFS) <KM109900> 2011/12 - 29 -...
  • Page 30 [AKD4688-A] -100 -110 -120 -130 -140 -140 -130 -120 -110 -100 dBFS Figure 20. Linearity (Input Frequency =1kHz) +0.9 +0.8 +0.7 +0.6 +0.5 +0.4 +0.3 +0.2 +0.1 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 Figure 21. Frequency Response (Input Level=0dBFS, including external RC Filter) <KM109900>...
  • Page 31 [AKD4688-A] -100 -105 -110 -115 -120 -125 -130 -135 -140 Figure 22. Cross-talk (Input Level=0dBFS) <KM109900> 2011/12 - 31 -...
  • Page 32 [AKD4688-A] 2-2. DAC部(fs=96kHz) -100 -110 -120 -130 -140 Figure 23. FFT(Input Frequency =1kHz, Input Level=0dBFS) -100 -110 -120 -130 -140 Figure 24. FFT(Input Frequency =1kHz, Input Level=-60dBFS) <KM109900> 2011/12 - 32 -...
  • Page 33 [AKD4688-A] -100 -110 -120 -130 -140 Figure 25. FFT(noise floor) -100 -110 -120 -130 -140 100k Figure 26. FFT (Out of band Noise) <KM109900> 2011/12 - 33 -...
  • Page 34 [AKD4688-A] -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 27. THD+N vs Input Level (Input Frequency =1kHz) -100 -105 -110 -115 -120 Figure 28. THD+N vs fin (Input Level=0dBFS) <KM109900> 2011/12 - 34 -...
  • Page 35 [AKD4688-A] -100 -110 -120 -130 -140 -140 -130 -120 -110 -100 dBFS Figure 29. Linearity (Input Frequency =1kHz) +0.9 +0.8 +0.7 +0.6 +0.5 +0.4 +0.3 +0.2 +0.1 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 Figure 30. Frequency Response (Input Level=0dBFS, including external RC Filter) <KM109900>...
  • Page 36 [AKD4688-A] -100 -105 -110 -115 -120 -125 -130 -135 -140 Figure 31. Cross-talk (Input Level=0dBFS) <KM109900> 2011/12 - 36 -...
  • Page 37 [AKD4688-A] 2-3. DAC部 (fs=192kHz) -100 -110 -120 -130 -140 Figure 32. FFT(Input Frequency =1kHz, Input Level=0dBFS) -100 -110 -120 -130 -140 Figure 33. FFT(Input Frequency =1kHz, Input Level=-60dBFS) <KM109900> 2011/12 - 37 -...
  • Page 38 [AKD4688-A] -100 -110 -120 -130 -140 Figure 34. FFT(noise floor) -100 -110 -120 -130 -140 100k Figure 35. FFT (Out of band Noise) <KM109900> 2011/12 - 38 -...
  • Page 39 [AKD4688-A] -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 36. THD+N vs Input Level (Input Frequency =1kHz) -100 -105 -110 -115 -120 Figure 37. THD+N vs Input Frequency (Input Level=0dBFS) <KM109900> 2011/12 - 39 -...
  • Page 40 [AKD4688-A] -100 -110 -120 -130 -140 -140 -130 -120 -110 -100 dBFS Figure 38. Linearity ( Input Frequency =1kHz) +1.8 +1.6 +1.4 +1.2 +0.8 +0.6 +0.4 +0.2 -0.2 -0.4 -0.6 -0.8 -1.2 -1.4 -1.6 -1.8 Figure 39. Frequency Response (Input Level=0dBFS, including external RC Filter) <KM109900>...
  • Page 41 [AKD4688-A] -100 -105 -110 -115 -120 -125 -130 -135 -140 Figure 40. Cross-talk (Input Level=0dBFS) <KM109900> 2011/12 - 41 -...
  • Page 42  It is the responsibility of the buyer or distributor of AKM products, who distributes, disposes of, or otherwise places...
  • Page 43 AVSS1 R113 R114 CN104 48pin_4 RIN3 LIN3 RIN2 LIN2 RIN1 LIN1 SDA/AIN1 SCL/AIN0 Title Title Title AKD4688-A-36QFN-SUB AKD4688-A-36QFN-SUB AKD4688-A-36QFN-SUB Size Size Size Document Number Document Number Document Number AK4688 Plastic AK4688 Plastic AK4688 Plastic - 43 - Date: Date: Date:...
  • Page 44 MR-552LS MR-552LS AVSS2 AVSS2 AVSS2 AVSS2 AVSS2 AVSS2 AVSS2 AVSS2 Title Title Title AKD4688-A AKD4688-A AKD4688-A Size Size Size Document Number Document Number Document Number Analog Input / Output Analog Input / Output Analog Input / Output - 44 -...
  • Page 45 HSU119 HSU119 AIN0 CAD0/CKS TEST1 TEST2 0.1u 0.1u ATE1D-2M3 ATE1D-2M3 DIR PDN VSS3 DGND Title Title Title AKD4688-A AKD4688-A AKD4688-A Size Size Size Document Number Document Number Document Number CONTROL CONTROL CONTROL - 45 - Date: Date: Date: Tuesday, December 13, 2011...
  • Page 46 TOTX147 BICK1 LRCK1 DGND SDTO DA02 DA02 DGND MR-552LS MR-552LS Title Title Title DGND AKD4688-A AKD4688-A AKD4688-A Size Size Size Document Number Document Number Document Number - 46 - Date: Date: Date: Tuesday, December 13, 2011 Tuesday, December 13, 2011...
  • Page 47 DIR_LRCK DGND MCLK2 BICK2 LRCK2 DIR_BICK SDTI A1-10PA-2.54DSA A1-10PA-2.54DSA DIR_MCLK DGND Title Title Title AKD4688-A AKD4688-A AKD4688-A Size Size Size Document Number Document Number Document Number - 47 - Date: Date: Date: Tuesday, December 13, 2011 Tuesday, December 13, 2011...
  • Page 48 (open) (short) (short) CVSS CVSS VSS3 AVSS2 DGND VSS3 VSS3 DVDD (short) (short) Title Title Title AKD4688-A AKD4688-A AKD4688-A Size Size Size Document Number Document Number Document Number POWER POWER POWER - 48 - Date: Date: Date: Tuesday, December 13, 2011...
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