AKM AK4940VN Evaluation Board Manual

AKM
Brand
AKM
Model
AK4940VN
Type
Evaluation Board Manual

AKM AK4940VN is a monaural audio CODEC with a microphone pre-amplifier and an analog direct path. It features stereo-mini jacks for analog input and output, an RCA connector for analog output, and an optical connector for digital interface. The AK4940VN can be used for a variety of audio applications, including music playback, recording, and voice communication. It is also well-suited for use in portable devices, thanks to its low power consumption and small size.

Here are some of the key features of the AK4940VN:

  • Monaural audio CODEC with a microphone pre-amplifier and an analog direct path

AKM AK4940VN is a monaural audio CODEC with a microphone pre-amplifier and an analog direct path. It features stereo-mini jacks for analog input and output, an RCA connector for analog output, and an optical connector for digital interface. The AK4940VN can be used for a variety of audio applications, including music playback, recording, and voice communication. It is also well-suited for use in portable devices, thanks to its low power consumption and small size.

Here are some of the key features of the AK4940VN:

  • Monaural audio CODEC with a microphone pre-amplifier and an analog direct path
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 1 -
GENERAL DESCRIPTION
The AKD4940-A is an evaluation board for the AK4940, monaural audio CODEC with a microphone
pre-amplifier and an analog direct path. The AKD4940-A also has the digital audio interface and can
achieve the interface with digital audio systems via opt-connector.
Ordering guide
AKD4940-A --- Evaluation board for AK4940VN.
(Control software is included in this package)
FUNCTION
Analog audio input : Stereo-mini jack (x2)
Analog audio output : Stereo-mini jack (x2),RCA connector (x1)
Digital interface
- DIT&DIR (AK4118A) : Optical connector
- 8pin header for external signal interface
USB port for the board control
AK4118A
(DIR&DIT)
Opt In
Opt Out
AK4940
+6～+12V
OUT2P
Pin Header
GND
Regulators
OUT1N
OUT1P
OUT3
USB IF
AVDD
TVDD
Figure 1. AKD4940-A Block Diagram
* Circuit diagram and PCB layout are attached at the end of this manual.
AK4940 Evaluation board Rev.1
AKD4940-A
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 2 -
Board Outline Chart
Board Diagram
figure 2.AKD4940-A Outline Chart
Description
(1) U101 ( AK4940 )
Audio CODEC.
(2) J201, J202, J203, J204, J205 ( Analog data )
J201, J202 Stereo mini jack : Analog Input for IN1N/P, IN2N/P.
J203, J204 Stereo mini jack : Analog Output for OUT1N/P, OUT2N/P.
J205 RCA Connector : Analog Output for OUT3.
(3) PORT301, PORT302 ( Optical Connector )
PORT301 : Input optical signal to AK4118A.
PORT302 : Output optical signal from AK4118A.
(4) PORT303( External signal port )
PORT303 : External digital signal.
(5) J501, J502, J503, J504 ( Power supply )
J501 (VIN) : +6V～+12V Power Supply
J502 (AVDD) : +3.3V Power Supply
J503 (TVDD) : +1.8V/+3.3V Power Supply
J504 (GND) : GND
(6) U301 ( AK4118A )
AK4118A has DIR, DIT and X’tal oscillator.
(7) U402 ( PIC )
USB control chip. Sets up AK4940 registers from PC via USB port (PORT401).
Analog Input
Power Supply Jack
Optical Output
USB Port
External Port
U101
U301
T503
T504
T401
Analog Output
Optical Input
T502
T501
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
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Evaluation Board Manual
■ Operation Sequence
1) Set up Power Supplies by jacks
1.1 When AVDD, TVDD are supplied from regulator. (Default)
JP501, JP502, JP503 select the path from regulator.
JP501
AVDD_SEL
JP503
TVDD_SEL2
J501
VIN
J503
AVDD / OPEN
J504
TVDD / OPEN
REG CON
REG CON
figure 3. Setting of using the regulator
1.2 In default setting, the voltage of TVDD is 3.3V (JP502).
JP502
TVDD-SEL1
+3.3V +1.8V
figure 4. Setting of TVDD selector
1.3 When AVDD, TVDD are supplied from the power supply connectors.
JP501, JP503 select the path from the power supply connectors.
JP501
AVDD_SEL
JP503
TVDD_SEL2
J501
VIN
J503
AVDD / OPEN
J504
TVDD / OPEN
REG CON
REG CON
figure 5. Setting of using the power supply connector
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
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2) Analog Input Setting
2.1 Differential mode.
JP201
Diff Sel
JP202
Diff Sel
1 2 3
1 2 3
figure 6. Setting of using the analog input selector
2.2 Pseudo- Differential mode or Singl Ended mode.
JP201
Diff Sel
JP202
Diff Sel
1 2 3
1 2 3
figure 7. Setting of using the analog input selector
3) Setup the Audio I/F Evaluation Mode.
3.1 Using AK4118A.
JP301
SDOUT_SEL
JP302
BICK_SEL
1 2 3
1 2 3
1 2 3
1 2 3
JP302
JP302
SDIN_SEL
LRCK_SEL
figure 8. Setting of using the AK4118A
3.2 Using External signal.
JP301
SDOUT_SEL
JP302
BICK_SEL
1 2 3
1 2 3
1 2 3
1 2 3
JP302
JP302
SDIN_SEL
LRCK_SEL
figure 9. Setting of using the PORT303
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 5 -
CONTROL SOFT MANUAL
■ Evaluation Board and Control Soft Settings
1. Set an evaluation board properly.
2. Connect Evaluation board to PC with USB cable.
USB control is recognized as HID (Human Interface Device) on the PC.
When it can not be recognized correctly please reconnect Evaluation board to PC with USB cable.
3. Proceed evaluation by following the process below.
[Support OS]
Windows 7 / 10 (32 / 64 bit)
■ Operation Screen
1. Start up the control program following the process above.
2. After the evaluation board’s power is supplied, the AK4940 must be reset once.
(Pushing [Port Reset] button, and power up AK4940 by [PDN : H] button.)
3. The operation screen is shown below
figure 10. Control Soft display
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 6 -
■ 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.
Refer to the “■ Dialog Boxes” for details of each dialog box setting.
figure 11. Operation Overview
1. [Port Reset] : For when connecting to PC with USB cable
Click this button after the control soft starts up when connecting to PC with USB cable.
This button can reset AK4118A and AK4940.
2. [Write Default] : Register Initializing
When the device is reset by a hardware reset, use this button to initialize the registers.
3. [All Write] : Executing write commands for all registers displayed.
4. [Save] : Saving current register settings to a file.
5. [Load] : Executing data write from a saved file.
6. [All Reg Write] : [All Reg Write] dialog box is popped up.
7. [Sequence] : [Sequence] dialog box is popped up.
8. [Sequence (File)] : [Sequence (File)] dialog box is popped up.
9. [PDN : H] : Selection PDN H/L of AK4940.
(5)
(4)
(3)
(2)
(1)
(6)
(7)
(8)
(9)
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 7 -
■ Tab Functions
1. [Function]: Esay function control tab
This tab is for the control of this evaluation board easily.
Each button link to the register of AK4940 and AK4118A, the register is written by push these buttons.
figure 12. Window of [Function]
(1-1) [A/D , D/A On]
Setting:AK4940 and AK4118A Power On.
Mode:Lineout +0dB/ExtSlave/I2S/48kHz.
figure 13. Button of [A/D , D/A On]
(1-2)
(1-3)
(1-4)
(1-5)
(1-6)
(1-7)
(1-8)
(1-9)
(1-1)
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
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(1-2) [ADC Setting]
Setting “MIC Gain Amp” and “ADC Digital Volume” and “Digital Filter” and “Attenuation Speed”.
figure 14. ADC Setting
(1-3) [Analog input select]
Selecting analog input interface “differntial” or “single-end” and “IN1P/IN1N” or “IN2P/IN2N”.
figure 15. Analog input select
(1-4) [DAC Setting]
Setting “DAC Digital Volume” and “Attenuation Speed” and “Soft Mute”.
figure 16. DAC Setting
(1-5) [Analog output select]
Selecting analog output interface OUT1P/N and OUT2P/N “Mute” or “Analog Direct” or “DAC Lineout”.
Selecting analog output interface OUT3 “Mute” or “DAC Lineout(+)” or “DAC Lineout(-)” and “Inv. DAC Lineout(+)” or AVDD/2.
figure 17. Analog output select
Slider bar is
moved to the
selected value.
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 9 -
(1-6) [SDIN select]
Selecting SDIN INV bit “Normal” or “Inverted”.
figure 18. SDIN select
(1-7) [Audio I/F setting]
Selecting the audio format of AK4940.
figure 19. Audio I/F setting
(1-8) [~Power bit Setting~]
ADC or DAC : Button on :ADC or DAC Power Up.
ADC or DAC : Button off :ADC or DAC Power Down.
figure 20. Button of [Power Down/UP]
(1-9) [AK4118A Setting]
Selecting power up and the audio format of AK4118A.
figure 21. Window of [AK4118A Setting]
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 10 -
2. [REG]: 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” or “0” and the bit name is in blue (when read only it is in gray)
Grayout registers are Read Only registers. They can not be controlled.
The registers which is not defined in the datasheet are indicated as “---”.
figure 22. Window of [REG]
(1-1) [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 the checkbox is checked, the data will be “H” or “1”. When the checkbox is not checked, the data will be “L”
or “0”. Click [OK] to write setting values to the registers, or click [Cancel] to cancel this setting.
figure 23. Window of [Register Set]
(1-2) [Read]: Data Read
Click [Read] button located on the right of the each corresponded address to execute a register read.
After register reading, the display will be updated regarding to the register status.
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” or “0” and the bit name is in blue (when read only it is in gray)
Please be aware that button statuses will be changed by a Read command.
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 11 -
■ Dialog Boxes
1. [All Reg Write]: All Reg 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.
figure 24. Window of [All Register Write]
[Open (left)] : Selects a register setting file (*.akr).
[Write] : Executes register writing by the setting of selected file.
[Help] : Opens a help window.
[Save] : Saves a register setting file assignment. The file name is “*.mar”.
[Open (right)] : Opens a saved register setting file assignment “*. mar”.
[Close] : Closes the dialog box and finish the process.
[Interval time] : The frequency of the writing.
~ Operating Suggestions ~
1. Those files saved by [Save] button and opened by [Open] button on the right of the dialog “*.mar” should be stored in the same
folder.
2. When register settings are changed by [Save] button in the main window, re-read the file to reflect new register settings.
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 12 -
2. [Save]: [Save Address of Register] Dialog Box
Click the [Save] button in the main window for save address setting dialog box.
figure 25. Window of [SAVE]
[All Address] check box : When the [All Address] checkbox is checked, all register settings will be saved.
[Start Address] edit box : When the [All Address] check box is not checked, set starts register address to save.
[End Address] edit box : When the [All Address] check box is not checked, set end register address to save.
[OK] button : Selects a file to save and saves register settings.
[Cancel] button : Cancel and finish this process.
[AK4118A] check box : When the [AK4118A] checkbox is checked, AK4118A settings will be saved.
3. [Sequence]: [Sequence] Dialog Box
Click the [Sequence] button in the main window to open register sequence setting dialog box.
Register sequence can be set in this dialog box.
figure 26. Window of [Sequence]
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 13 -
~ Sequence Setting ~
Set register sequence according to the following process.
1. Select a command
Use [Select] pull-down box to choose commands. Corresponding boxes will be valid.
< Select items>
・No use : Not using this address
・Register : Register write
・Reg_Mask : Register write (Masked)
・Interval : Takes an interval
・Stop : Pauses the sequence
・End : Ends the sequence
2. Input sequence
[Address] : Data address
[Data] : Write data
[Mask] : Mask
This value “ANDed” with the write data becomes the input data.
The bits which corresponding Mask bit = “0” are not changed. At this time, data read is not executed, and the storage data of
this software is used.
“Write Default” must be executed after power up the AK4940 or when the AK4940 is reset by the PDN pin since the storage
data and register values are different. This is the actual write data.
When Mask = 0x00, current setting is hold.
When Mask = 0xFF, the 8bit data which is set in the [Data] box is written.
When Mask = 0x0F, lower 4bit data which is set in the [Data] box is written.
Upper 4bit is hold to current setting.
[Interval] : Interval time
Valid boxes for each process command are shown below.
・No use : None
・Register : [ Address ], [ Data ], [ Interval ]
・Reg_Mask : [ Address ], [ Data ], [ Mask ], [ Interval ]
・Interval : [ Interval ]
・Stop : None
・End : None
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 14 -
~ Control Buttons ~
Functions of Control Button are shown below.
[DEL] button : Checked step is deleted.
[INS] button : The last deleted step is inserted to checked step.
[Start Step] select : Select start step.
No.1 Step : Start from No.1 step.
Checked Step : Start from checked step.
[Start] button : Executes the sequence.
[Stop] button : Stops the sequence.
[Help] button : Opens a help window.
[Save] button : Saves sequence settings as a file. The file name is “*.aks”.
[Open] button : Opens a sequence setting file “*.aks”.
[Close] button : Closes the dialog box and finishes the process.
~ Stop of the Sequence ~
When “Stop” is selected in the sequence, the process is paused at this step and restart step number is checked.
It starts again from the checked step by clicking the [Start] button. When the process at the end of sequence is finished, “Step No.1” of
[start step] is selected automatically.
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 15 -
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.
figure 27. Window of [ Sequence(File) ]
[Open (left)] : Opens a sequence setting file (*.aks).
[Start] : Executes the sequence by the setting of selected file.
[Start All] : Executing all sequence settings.
Selected files are executed in descending order.
[Help] : Opens a help window.
[Save] : Saves a sequence setting file assignment. The file name is “*.mas”.
[Open(right)] : Opens a saved sequence setting file assignment “*. mas”.
[Close] : Closes the dialog box and finishes the process.
~ Operating Suggestions ~
1. Those files saved by [Save] button and opened by [Open] button on the right of the dialog “*.mas” should be
stored in the same folder.
2. When “Stop” is selected in the sequence the process will be paused and a pop-up message will appear. Click
“OK” to continue the process.
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 16 -
Mesurement Data
[Measurement condition]
Measurement unit : SYS-2722(No.00750) PSIA-2722(No.00121)
BICK : 64fs
LRCK : 48 kHz
Bit : 24bit
Input Frequency : 1kHz
Power Supply : AVDD = TVDD = +3.3V(Regulator)
Band Width : 20 Hz ~ 4 kHz (fs=8kHz)、20 Hz ~ 20 kHz (fs=48 kHz)
Pass : SYS-2722 (PSIA)⇔AK4940
Temperature : Room Temperature
[Measurement Result]
1. Gain Amp+Monaural ADC (IN1P / IN1N pins, IN2P / IN2N pins, MGNL/R=”+0dB”)
Parameter
Input
Signal
Fs
filter
Results
Units
IN1P/IN1N
IN2P/IN2N
S/(N+D)
-1dBFS
8kHz
4kHz LPF
105.3
105.6
dBFS
Dynamic Range
-60dBFS
None
107.0
106.8
S/N
No Signal
None
106.7
106.7
S/(N+D)
-1dBFS
48 kHz
20kHz LPF
92.0
92.0
Dynamic Range
-60dBFS
A-weighted
98.9
98.8
S/N
No Signal
A-weighted
99.0
98.9
2. DAC+Line-out (OUT1P / OUT1N pins, OUT2P / OUT2N pins, OUT3 pins)
Parameter
Input
Signal
Fs
filter
Results
Units
OUT1P/OUT1N
OUT2P/OUT2N
OUT3
S/(N+D)
0dBFS
8 kHz
4kHz LPF
90.2
89.3
89.4
dBFS
Dynamic Range
-60dBFS
None
107.4
107.4
107.7
S/N
No Signal
None
107.3
107.4
107.6
S/(N+D)
0dBFS
48 kHz
20kHz LPF
87.9
87.8
87.4
Dynamic Range
-60dBFS
A-weighted
103.8
104.1
104.3
S/N
No Signal
A-weighted
104.0
104.0
104.4
ASAHI KASEI [AKD4940-A]
<KM126402> 2018/07
- 17 -
Date
(YY/MM/DD)
Manual
Revision
Board
Revision
Reason
Contents
17/09/19
KM126400
0
First Edition
18/04/10
KM126401
1
Changed
Device revision up.(Rev.A→Rev.B)
18/04/10
KM126401
1
Modification
Schematic update.
18/07/03
KM126402
1
Changed
Control Soft update.
18/07/03
KM126402
1
Modification
Add measurement data.
IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the information contained in this
document without notice. When you consider any use or application of AKM product stipulated in this document
(“Product”), please make inquiries the sales office of AKM or authorized distributors as to current status of the Products.
1. All information included in this document are provided only to illustrate the operation and application examples of AKM
Products. AKM neither makes warranties or representations with respect to the accuracy or completeness of the
information contained in this document nor grants any license to any intellectual property rights or any other rights of
AKM or any third party with respect to the information in this document. You are fully responsible for use of such
information contained in this document in your product design or applications. AKM ASSUMES NO LIABILITY FOR
ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE USE OF SUCH INFORMATION
IN YOUR PRODUCT DESIGN OR APPLICATIONS.
2. The Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of
quality and/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious
property damage or serious public impact, including but not limited to, equipment used in nuclear facilities, equipment
used in the aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other
transportation, traffic signaling equipment, equipment used to control combustions or explosions, safety devices,
elevators and escalators, devices related to electric power, and equipment used in finance-related fields. Do not use
Product for the above use unless specifically agreed by AKM in writing.
3. Though AKM works continually to improve the Product’s quality and reliability, you are responsible for complying with
safety standards and for providing adequate designs and safeguards for your hardware, software and systems which
minimize risk and avoid situations in which a malfunction or failure of the Product could cause loss of human life, bodily
injury or damage to property, including data loss or corruption.
4. Do not use or otherwise make available the Product or related technology or any information contained in this document
for any military purposes, including without limitation, for the design, development, use, stockpiling or manufacturing of
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prohibited under any applicable domestic or foreign laws or regulations.
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losses occurring as a result of noncompliance with applicable laws and regulations.
6. Resale of the Product with provisions different from the statement and/or technical features set forth in this document
shall immediately void any warranty granted by AKM for the Product and shall not create or extend in any manner
whatsoever, any liability of AKM.
7. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent of
AKM.
Revision History
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
AVSS
OUT1P
OUT1N
IN1P
OUT3
OUT2N
OUT2P
IN2N
IN2P
PDN
STO
IN1N
LRCK
TEST
AVDD
SDOUT
DVSS
TVDD
SDIN
BICK
SCL
SDA
AVDRV
VCOM
GND
GND
GND
GND
GND
GND GND
GND
GNDGND
GND
GND GND
GND
GND GND
GND
GND
GND
GND
GND
GND
GND
GNDGND
GND
GND
GND
GND
GND
OUT1N
OUT1P
BICK
OUT3
OUT2P
OUT2N
IN2N
IN2P
PDN-CODEC
STO
IN1N
IN1P
LRCK
TEST
TVDD
AVDD
SDIN
SDOUT
SCL
SDA
Title
Size Document Number Rev
Date: Sheet of
Main
1
<AKD4940-A>
A2
1 5Tuesday, April 10, 2018
Title
Size Document Number Rev
Date: Sheet of
Main
1
<AKD4940-A>
A2
1 5Tuesday, April 10, 2018
Title
Size Document Number Rev
Date: Sheet of
Main
1
<AKD4940-A>
A2
1 5Tuesday, April 10, 2018
+
C103
10u
TP112
TP103
R107 0
TP108
TP105
TP106
C107 2.2u
R105 0
TP121
TP124
LE101
2 1
R103 0
TP119
TP117
C101 2.2u
TP113
CN104
92pin_1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CN102
92pin_4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
TP114
TP118
CN101
92pin_3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
TP116
TP120
R109 0
+
C106
10u
TP107 TP110
TP109
R108 0
R106 0
CN103
92pin_2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
R101 open
TP102
R104 0
TP101
C104
0.1u
C102 open
TP115
TP111
TP104
U101
AK4940VN
IN2P
1
IN1N
2
IN1P
3
TEST
4
BICK
5
LRCK
6
SDOUT
7
SDIN
8
DVSS
9
TVDD
10
SDA
11
SCL
12
PDN
13
STO
14
AVDRV
15
OUT2N
16
OUT2P
17
OUT3
18
OUT1N
19
OUT1P
20
AVDD
21
VCOM
22
AVSS
23
IN2N
24
TAB
25
C105
0.1u
TP123
R111 0
R110 0
R102 10k
TP122
+
C108 open(s)
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
OUT2N
OUT1P
OUT2P
OUT1N
Diff Sel
1-2 :Full-diff
2-3 :Pseudo-diff or Single Ended
IN1N
IN2P
IN1P
IN2N
Diff Sel
1-2 :Full-diff
2-3 :Pseudo-diff or Single Ended
GND
GND
GND
GND
GND
GND GND
GND GND
GND GND
GND GND
GND GND
OUT1N
OUT1P
OUT2N
OUT2P
OUT3
IN1N
IN2N
IN1P
IN2P
Title
Size Document Number Rev
Date: Sheet of
INPUT&OUTPUT
1
<AKD4940-A>
A4
2 5
Tuesday, April 10, 2018
Title
Size Document Number Rev
Date: Sheet of
INPUT&OUTPUT
1
<AKD4940-A>
A4
2 5
Tuesday, April 10, 2018
Title
Size Document Number Rev
Date: Sheet of
INPUT&OUTPUT
1
<AKD4940-A>
A4
2 5
Tuesday, April 10, 2018
J202
AIN2
5
2
1
+
C202 10u(s)
TP201
IN1N
TP206
OUT1P
J201
AIN1
5
2
1
TP209
OUT3
+
C204 10u(s)
TP207
OUT2N
TP203
IN2N
+
C201 10u(s)
R203
open(s)
R204
open(s)
+
C20710u(s)
R202
open(s)
JP202
2
1
3
J205
AOUT3
1 2
3
4
5
+
C20610u(s)
C210
open(s)
J204
AOUT2
5
2
1
R205
open(s)
+
C20810u(s)
TP208
OUT2P
TP205
OUT1N
TP202
IN1P
+
C203 10u(s)
C212
open(s)
C213
open(s)
+
C20510u(s)
C211
open(s)
JP201
2
1
3
+
C20910u(s)
TP204
IN2P
J203
AOUT1
5
2
1
C214
open(s)
R201
open(s)
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
D3.3V
PDN-4118A
D3.3V
D3.3V
D3.3V
DIF0-4118A
DIF1-4118A
DIF2-4118A
D3.3V
D3.3V
INT0
D3.3V
D3.3V
TVDDD3.3V
SDIN
SDOUT
BICK
LRCK
INT0
STO
Title
Size Document Number Rev
Date: Sheet of
AK4118A
1
<AKD4940-A>
A3
3 5Tuesday, April 10, 2018
Title
Size Document Number Rev
Date: Sheet of
AK4118A
1
<AKD4940-A>
A3
3 5Tuesday, April 10, 2018
Title
Size Document Number Rev
Date: Sheet of
AK4118A
1
<AKD4940-A>
A3
3 5Tuesday, April 10, 2018
C304
0.1u
AK4118A
U301
AK4118A
IPS0
1
NC1
2
DIF0
3
TEST2
4
DIF1
5
VSS1
6
DIF2
7
IPS1
8
P/SN
9
XTL0
10
XTL1
11
VIN
12
TVDD
13
NC2
14
TX0
15
TX1
16
BOUT
17
COUT
18
UOUT
19
VOUT
20
DVDD
21
VSS2
22
MCKO1
23
LRCK
24
SDTO
25
BICK
26
MCKO2
27
DAUX
28
XTO
29
XTI
30
PDN
31
CM0
32
CM1
33
OCKS1
34
OCKS0
35
INT0
36
INT1
37
AVDD
38
R
39
VCOM
40
VSS3
41
RX0
42
NC3
43
RX1
44
TEST1
45
RX2
46
VSS4
47
RX3
48
R318 open
C312
0.1u
C314
0.1u
L301 10uH
+
C309 10u
R307 0
R311 0
C315
0.1u
R316 10k
R313 1k
C306 8p
R301 470
R314 10k
LE302
STO
2 1
JP302
BICK-SEL
AK4118A
EXT
2
1
3
X301
24.576MHz
12
R306 0
C310 0.1u
R308 0
C313
0.1u
+
C311 10u
U304
ADG3304
VCCA
1
A1
2
A2
3
A3
4
A4
5
NC1
6
GND
7
EN
8
NC2
9
Y4
10
Y1
13
VCCY
14
Y2
12
Y3
11
R303 680
C302 0.1u
C303
0.47u
R310 0
+
C305
10u
+
C301 10u
LE303
2 1
R312 0
R317 10k
JP304
LRCK-SEL
AK4118A
EXT
2
1
3
JP301
SDOUT-SEL
AK4118A
EXT
2
1
3
R315 10k
C307 8p
R302
10k
PORT301
RX-OPT
OUT
1
VCC
3
GND
2
U302
SN74LVC2G14DCK
1A
1
GND
2
2Y
4
VCC
5
2A
3
1Y
6
PORT303
1:BICK 2:GND
3:LRCK 4:GND
5:SDIN 6:GND
7:SDOUT 8:GND
12
34
56
78
C308 0.1u
LE301 PDN-4118A
21
PORT302
TX-OPT
GND
1
VCC
2
IN
3
JP303
SDIN-SEL
AK4118A
EXT
2
1
3
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AKM AK4940VN Evaluation Board Manual

AKM
Brand
AKM
Model
AK4940VN
Type
Evaluation Board Manual

AKM AK4940VN is a monaural audio CODEC with a microphone pre-amplifier and an analog direct path. It features stereo-mini jacks for analog input and output, an RCA connector for analog output, and an optical connector for digital interface. The AK4940VN can be used for a variety of audio applications, including music playback, recording, and voice communication. It is also well-suited for use in portable devices, thanks to its low power consumption and small size.

Here are some of the key features of the AK4940VN:

  • Monaural audio CODEC with a microphone pre-amplifier and an analog direct path
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