AKM AK4628AVQ Evaluation Board Manual

[AKD4628A-B]

<KM084901> 2007/07

- 1 -

AKD4628A-B CODEC AK4628A

BNC



AKD4628A-B --- AK4628A

IBM-AT

Windows NT



-DIT(AK4103A),DIR(AK4112B) BNC

-AC3 10

 10

Input

Buffer

LIN

RIN

LOUT1

ROUT1

LOUT2

ROUT2

LOUT3

ROUT3

GND

AK4628A

AK4103A(DIT)

AK4112B(DIR)

10pin Header

Control Data

BNC In

Opt In

Opt Out

A

C3

-15V +15V

Output

Buffer

Regulator

LOUT4

ROUT4

1. AKD4628A-B

*

AK4628A Rev.1

AKD4628A-B

[AKD4628A-B]

<KM084901> 2007/07

- 2 -

PORT1

uP-I/F

1

2

910

CSN

CCLK

CDTI

CDTO

[+12V] ( ) = +12 +15V

[-12V] ( ) = -12 -15V

[AGND] ( ) = 0V

[DGND] ( ) = 0V

12V

+12V (T1,T2) +5V, +3.3V

+5V AK4628A AK4112B TVDD

+3.3V AK4628A TVDD AK4112B AVDD DVDD

AK4628A AK4112B AK4103A SW1 ”L”

AK4628A AK4112B

(POTR1 )

AKD4628A-B

IBM-AT

10 PORT1(uP-I/F)

PC

1 2. PORT1

PORT1 2

[AKD4628A-B]

<KM084901> 2007/07

- 3 -

( 2 )

(1) ADC

TOTX176 AK4112B PLL X’tal

(2) DAC

TORX or BNC AK4112B PLL JP4, 5, 6, 7 4112B

(3) 1

AK4112B PLL X’tal JP4, 5, 6, 7 4112B

(4) DSP

10 PORT4 JP4,5,6,7 DSP

AK4112B

JP4, 5, 6, 7

I/F

ADC CM1=”0”, CM0=”0”(PLL mode) or

CM1=”0”, CM0=”1”(X’tal mode)

Don’t care

TOTX176

DAC CM1=”0”, CM0=”0”(PLL mode) “4112B” TORX176 or BNC

CM1=”0”, CM0=”1”(X’tal mode) “4112B”

DSP

CM1=”0”, CM0=”0”(PLL mode) “DSP” PORT5 (10-pin Header)

( )1.AK4112B ”akd4628a-b-ak4112b.exe”

2.CM1,0 Addr=00H D5,4

2.

DIP SW2 ( AK4628A, AK4103A )

1.DFS_4529(SW2-1) AK4628A

DFS_4529 Sampling Speed (fs)

OFF Normal Speed Mode 32kHz~48kHz

ON Double Speed Mode 64kHz~96kHz

Default

3.

2.V(SW2-2) AK4103A Validity

V Validity

OFF Valid

ON Invalid

Default

4. Validity

3.FS3(SW2-3), FS2(SW2-4) AK4103A

FS3 FS2 Sampling frequency setting

OFF OFF 44.1kHz

OFF ON 48kHz

ON OFF Reserved

ON ON 32kHz

Default

5.

[AKD4628A-B]

<KM084901> 2007/07

- 4 -

4.CKS0(SW2-5) AK4103A

CKS1 MCLK fs

OFF 256fs 28k-108kHz

ON 512fs 28k-54kHz

Default

6.

5.DIF0(SW2-6) AK4103A

DIF0

LRCK BICK

OFF 24bit, Left justified H/L 48fs-128fs

ON 24bit, I

2

S L/H 48fs-128fs

Default

7.

[JP1] (GND)---

[JP4, 5, 6, 7] (SDTI1, 2, 3, 4)--- AK4628A SDTI1,2,3,4

<DSP> : PORT4 DSP

<4112A> : AK4112B SDTO <Default>

[JP3] (V/TX) --- AK4112B V/TX

<V> : Validity <Default>

<TX> :

[JP2] (OPT/COAX) --- BNC AK4112B RX1

<OPT_IN> : AK4112B RX1 <Default>

<RX12> : AK4112B RX1 BNC

[SW1] : AK4628A AK4112B AK4103A “H”

[LE1] (DZF1) :

[LE2] (DZF2_OVF) :

[LE3] (ERF) : AK4112B

[LE4] (FS96) : AK4112B 96kHz

[LE5] (AUTO) : AK4112B AC-3/MPEG

[LE4] (V) : AK4112B

Validity

[AKD4628A-B]

<KM084901> 2007/07

- 5 -



AK4628A

Signal

22u

32 RIN

Same circuit

3.0Vpp

OP275GPZ

-

+

Op-amp circuit

31 LIN

6.0Vpp

330

1)

330/(330+330) = -6.02dB

+0.51dBV(=3.0Vpp)+6.02dB

= +6.53dBV = 6.00Vpp = 2.12Vrms

[AKD4628A-B]

<KM084901> 2007/07

- 6 -



A

K4628A

22u

Signal

6.0Vpp

28

27

26

25

ROUT1

Same circuit

3.0Vpp

OP275GPZ

+

-

LOUT1

ROUT2

LOUT2

ROUT3

LOUT3

24

23

Same circuit

10k

4.7k

330p

220

ROUT4

LOUT4

22

21

Same circuit

1 LPF

1) HPF F

AK4628A DC HPF

1 HPF F

| |

2

= 1/{1+(fc/f)

2

}; fc=1/2πRC=0.7Hz@R=10k,C=22u

fin 20Hz

Frequency Response

-0.006dB

2) S/N F

AK4628A 2 1

a)

1+4.7k/4.7k = +6.02dB

0.51dBV(=3.0Vpp) + 6.02dB

= 6.53dBV = 6.00Vpp = 2.12Vrms

[AKD4628A-B]

<KM084901> 2007/07

- 7 -

c) F

F

| |

2

= K*{1+(f/fc

2

)

2

}/{1+(f/fc

1

)

2

};

K = 1+4.7k/4.7k = 2,

fc

1

= 1/2πRC = 102.7kHz@R=4.7k,C=330p,

fc

2

= K*fc

1

= 205.3kHz

fin DC 20kHz 40kHz 80kHz 145kHz

∞

Frequency Response 0dB

-0.121dB -0.452dB -1.448dB

-3dB -6dB

F 1 LPF

A

K4628A

22u

Signal

6.0Vpp

28

27

26

25

ROUT1

Same circuit

3.0Vpp

OP275GPZ

+

-

LOUT1

ROUT2

LOUT2

ROUT3

LOUT3

24

23

Same circuit

10k

4.7k

3300p

220

LPF

ROUT4

LOUT4

22

21

Same circuit

1 LPF

F

| |

2

= 1/{1+(f/fc)

2

};

fc = 1/2πRC = 219kHz@R=220,C=3300p,

fin DC 20kHz 40kHz 80kHz 219kHz

∞

Frequency Response 0dB

-0.036dB -0.142dB -0.543dB

-3dB

-∞dB

F F AK4628A LPF

[AKD4628A-B]

<KM084901> 2007/07

- 8 -



1. AKD4628A-B

2. IBM-AT AKD4628A-B 10 10

(Windows 2000/XP

AKM

Windows95/98/ME

Windows NT )

3. “AKD4628A-B Evaluation Kit” CD-ROM CD-ROM

4. CD-ROM

“akd4628a-b-ak4628a.exe” --- AK4628A

“akd4628a-b-ak4112b.exe” --- AK4112B

5.

AK4112B DIR DSP 10 PORT4

X’tal (P3. (4) )



1.

2. Port Reset



1. [Port Reset] : USB I/F (AKDUSBIF-A)

2. [Write Default] : AK4628A, AK4112B

3. [All Write] :

4. [Function1] :

5. [Function2] :

6. [Function3] :

7. [Function4] : [Function3]

8. [Function5] : [Save]

9. [Save] :

10. [Open]

11. [Write]:



“H” “1” “L” “0”

[AKD4628A-B]

<KM084901> 2007/07

- 9 -



1. [Write ]:

[Write]

(9 ) “H” “1”

“L” “0”

AK4628A, AK4112B [OK] [Cancel]

2. [Function1 ]:

Address : 16 2

Data : 16 2

AK4628A, AK4112B [OK] [Cancel]

3. [Function2 ]: ATT

03H, 04H

Address : 16 2

Start Data : Start Data 16 2

End Data : End Data 16 2

Interval : Interval AK4628A, AK4112B

Step : Step

Mode Select : 9

: Start Data End Data Start Data

[ ] Start Data = 00, End Data = 09

: 00 01 02 03 04 05 06 07 08 09 09 08 07 06 05 04 03 02 01 00

: Start Data End Data Start Data

[ ] Start Data = 00, End Data = 09

: 00 01 02 03 04 05 06 07 08 09

AK4628A, AK4112B [OK] [Cancel]

[AKD4628A-B]

<KM084901> 2007/07

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4. [Save] [Open]

4-1. [Save]

“akr”

(1)[Save]

(2) [Save] “akr”

4-2. [Open]

[Save] AK4628A, AK4112B [Save]

(1) [Open]

(2) ( “akr ”) [Open]

[AKD4628A-B]

<KM084901> 2007/07

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5. [Function3 ]

(1) [F3]

(2)

“-1”

(3) [Start]

“-1” [START]

[Function3] Window [Save] [Open]

“aks”

Figure 1. Window of [F3]

[AKD4628A-B]

<KM084901> 2007/07

- 12 -

6. [Function4 ]

[Function3] [F4]

Figure 2 window

Figure 2. [F4] window

[AKD4628A-B]

<KM084901> 2007/07

- 13 -

6-1. [OPEN] [START]

(1) [OPEN] (*.aks)

Figure 3

Figure 3. [F4] window(2)

(2) [START]

6-2. [SAVE] [OPEN]

[SAVE] : “*.ak4”

[OPEN] :

6-3.

(1) [Function4]

(2) [SAVE] [OPEN]

(3)[Function3]

[AKD4628A-B]

<KM084901> 2007/07

- 14 -

7. [Function5 ]

[SAVE]

[F5] Figure 4 Window

Figure 4. [F5] window

7-1. [OPEN] [WRITE]

(1) [OPEN] (*.akr)

(2) [WRITE]

7-2. [SAVE] [OPEN]

[SAVE] : “*.ak5”

[OPEN] : “*.ak5”

7-3.

(1) [SAVE] [OPEN]

(2) [Save]

[AKD4628A-B]

<KM084901> 2007/07

- 15 -

MEASUREMENT RESULTS

1) ADC part

[Measurement condition]

• Measurement unit : Audio Precision, System two, Cascade

• MCLK : 256fs

• BICK : 64fs

• fs : 48kHz, 96kHz

• BW : 10Hz∼20kHz(fs=48kHz), 10Hz∼48kHz(fs=96kHz)

• Bit : 24bit

• Power Supply : AVDD=DVDD= TVDD=5V

• Interface : DIT(AK4103)

• Temperature : Room

fs=48kHz

Parameter Input signal Measurement filter Lch Rch

S/(N+D) 1kHz, -0.5dB 20kLPF 95.6dB 95.7dB

20kLPF 99.3dB 99.0dBDR 1kHz, -60dB

20kLPF+A-weighted 101.8dB 101.2dB

20kLPF 99.5dB 99.4dBS/N No signal

20kLPF+A-weighted 101.8dB 101.2dB

fs=96kHz

Parameter Input signal Measurement filter Lch Rch

S/(N+D) 1kHz, -0.5dB fs/2 91.7dB 92.2dB

fs/2 96.3dB 95.9dBDR 1kHz, -60dB

fs/2+A-weighted 99.0dB 98.1dB

fs/2 96.3dB 95.9dBS/N No signal

fs/2+A-weighted 99.1dB 98.1dB

[AKD4628A-B]

<KM084901> 2007/07

- 16 -

2) DAC part

[Measurement condition]

• Measurement unit : Audio Precision, System two, Cascade(fs=48kHz, 96kHz)

• MCLK : 256fs

• BICK : 64fs

• fs : 48kHz, 96kHz

• BW : 10Hz∼22kHz (fs=48kHz), 10Hz∼40kHz (fs=96kHz)

• Bit : 24bit

• Power Supply : AVDD=DVDD= TVDD=5V

• Interface : DIR(AK4112B)

• Temperature : Room

fs=48kHz

Parameter Input signal Measurement filter Lch Rch

S/(N+D) 1kHz, 0dB 20kLPF 94.9dB 94.3dB

20kLPF 103.2dB 103.2dBDR 1kHz, -60dB

22kLPF+A-weighted 106.1dB 106.3dB

20kLPF 103.2dB 103.4dBS/N No signal

22kLPF+A-weighted 106.1dB 106.3dB

fs=96kHz

Parameter Input signal Measurement filter Lch Rch

S/(N+D) 1kHz, 0dB 40kHzLPF 92.7dB 92.7dB

40kHzLPF 100.3dB 100.3dBDR 1kHz, -60dB

40kHz +A-weighted 105.7dB 105.9dB

40kHz 100.7dB 100.8dBS/N No signal

40kHz +A-weighted 106.1dB 106.3dB

[AKD4628A-B]

<KM084901> 2007/07

- 17 -

1.ADC

(ADC fs=48kHz)

AKM AK4628A FFT

AVDD=DVDD=5V, fs=48kHz, -0.5dBr input, fin=1kHz

20 20k50 100 200 500 1k 2k 5k 10k

Hz

-180

+0

-170

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

d

B

F

S

FFT (Input=-0.5dBr, fin=1kHz)

AKM AK4628A FFT

AVDD=DVDD=5V, fs=48kHz, -60dBr input, fin=1kHz

20 20k50 100 200 500 1k 2k 5k 10k

Hz

-180

+0

-170

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

d

B

F

S

FFT (Input=-60dBr, fin=1kHz)

[AKD4628A-B]

<KM084901> 2007/07

- 18 -

(ADC fs=48kHz)

AKM AK4628A FFT

AVDD=DVDD=5V, fs=48kHz, No signal input, fin=1kHz

20 20k50 100 200 500 1k 2k 5k 10k

Hz

-180

+0

-170

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

d

B

F

S

FFT (noise floor)

[AKD4628A-B]

<KM084901> 2007/07

- 19 -

(ADC fs=48kHz)

AKM AK4628A THD+N vs. Input Level

AVDD=DVDD=5V, fs=96kHz, fin=1kHz

-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10

dBr

-120

-70

-115

-110

-105

-100

-95

-90

-85

-80

-75

d

B

F

S

THD + N vs Amplitude (fin=1kHz)

AKM AK4628A THD+N vs. Input Frequency

AVDD=DVDD=5V, -0.5dBr input, fs=48kHz

20 20k50 100 200 500 1k 2k 5k 10k

Hz

-120

-70

-115

-110

-105

-100

-95

-90

-85

-80

-75

d

B

F

S

THD + N vs Input Frequency (Input=-0.5dBr)

[AKD4628A-B]

<KM084901> 2007/07

- 20 -

(ADC fs=48kHz)

AKM AK4628A Linearity

AVDD=DVDD=5V, fs=48kHz, fin=1kHz

-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10

dBr

-120

+0

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

d

B

F

S

Linearity(fin=1kHz)

AKM AK4628A Frequency Response

AVDD=DVDD=5V, -0.5dBr input, fs=48kHz

20 20k50 100 200 500 1k 2k 5k 10k

Hz

-1

+0

-0.9

-0.8

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

d

B

F

S

Frequency Response(Input Level=-0.5dBr)

(including input RC filter)

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AKM AK4628AVQ Evaluation Board Manual

AKM AK4628AVQ Evaluation Board Manual

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