AK4641VN datasheet(6/51 Pages) AKM

Part #	AK4641VN

Description	16 BIT CODEC WITH BLUETOOTH INTERFACE

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Manufacturer	AKM [Asahi Kasei Microsystems]

Direct Link	http://www.akm.com

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ASAHI KASEI

[AK4641]

MS0301-E-00

2004/05

- 6 -

ANALOG CHARACTERISTICS

(Ta=25

°C; AVDD=DVDD=BVDD=3.3V; AVSS=DVSS=BVSS=0V; Signal Frequency=1kHz; 16bit Data;

Stereo CODEC: fs=44.1kHz, BICK=64fs; Measurement frequency=20Hz

∼ 20kHz;

Mono CODEC: Bfs=8kHz; BBICK=32Bfs; Measurement frequency=20Hz

∼ 3.4kHz; unless otherwise specified)

Parameter

Min

typ

max

Units

MIC Amplifier

Input Resistance

20

30

40

k

Ω

MGAIN bit = “0”

-

0

-

dB

Gain

MGAIN bit = “1”

-

+20

-

dB

MIC Power Supply

Output Voltage

(Note 4)

2.22

2.47

2.72

V

Load Resistance

2

-

k

Ω

Load Capacitance

-

30

pF

MIC Detection

Comparator Voltage Level

(Note 5)

0.165

-

0.257

V

Internal pull down Resistance

250

500

750

k

Ω

Input PGA Characteristics:

Input Resistance

(Note 6)

5

10

15

k

Ω

Step Size

0.1

0.5

0.9

dB

Max (IPGA6-0 bits = “47H”)

-

+27.5

-

dB

Gain Control Range

Min (IPGA6-0 bits = “00H”)

-

−8

-

dB

ADC Analog Input Characteristics of Stereo CODEC: MIC Gain=+20dB, IPGA=0dB, ALC1=OFF, MIC

→ IPGA

→ ADC of Stereo CODEC

Resolution

-

16

Bits

Input Voltage

(MIC Gain=+20dB, Note 7)

0.168

0.198

0.228

Vpp

S/(N+D)

(

−1dBFS)

71

81

-

dB

D-Range

(

−60dBFS, A-weighted)

78

86

-

dB

MIC Gain=+20dB, A-weighted

78

86

-

dB

S/N

MIC Gain=0dB, A-weighted

-

92

-

dB

DAC Characteristics of Stereo CODEC:

Resolution

-

16

Bits

Stereo Line Output Characteristics: RL=10kΩ, DAC of Stereo CODEC → LOUT/ROUT pins

Output Voltage

(Note 8)

1.78

1.98

2.18

Vpp

S/(N+D)

(0dBFS)

76

86

-

dBFS

S/N

(A-weighted)

82

90

-

dB

Interchannel Isolation

-

100

-

dB

Interchannel Gain Mismatch

-

0.1

0.5

dB

Load Resistance

10

-

k

Ω

Load Capacitance

-

30

pF

Note 4. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD (typ).

Note 5. Comparator Voltage Level is proportional to AVDD voltage. Vout = 0.05 x AVDD (min), 0.078 x AVDD (max).

Note 6. When IPGA Gain is changed, this typical value changes between 8k

Ω and 11kΩ.

Note 7. Input voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD (typ).

Note 8. Output voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ).

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