AK4649ECB 参数 Datasheet PDF下载

[AK4649]

ANALOG CHARACTERISTICS

(Ta=25°C; AVDD=DVDD=SVDD=3.3V; VSS1=VSS2=VSS3=0V; fs=44.1kHz, BICK=64fs;

Signal Frequency=1kHz; 24bit Data; Measurement frequency=20Hz

∼

20kHz; unless otherwise specified)

min

typ

max

Units

Parameter

MIC Amplifier:

LIN1, RIN1, LIN2, RIN2 pins

Input Resistance

20

30

40

kΩ

MGAIN3-0 bits = “0000”

-1

0

+1

dB

Gain

+19

MGAIN3-0 bits = “0001”

+20

+21

dB

+25

MGAIN3-0 bits = “0010”

+26

+27

dB

MGAIN3-0 bits = “0100”

+8

+9

+10

dB

MGAIN3-0 bits = “0101”

+15

+16

+17

dB

MGAIN3-0 bits = “0110”

+22

+23

+24

dB

MGAIN3-0 bits = “0111”

+28

+29

+30

dB

MGAIN3-0 bits = “1000”

+2

+3

+4

dB

MGAIN3-0 bits = “1001”

+5

+6

+7

dB

MGAIN3-0 bits = “1010”

+11

+12

+13

dB

MIC Power Supply:

MPWR pin

Output Voltage (Note

9)

2.38

2.64

2.90

V

Load Resistance

0.5

-

-

kΩ

Load Capacitance

-

-

30

pF

ADC Analog Input Characteristics:

LIN1/RIN1/LIN2/RIN2 pins

→

ADC

→

IVOL, IVOL=0dB, ALC=OFF

Resolution

-

-

24

Bits

0.208

0.231

0.254

Vpp

Input Voltage (Note

2.08

2.31

2.54

Vpp

70

80

-

dBFS

S/(N+D) (−1dBFS)

-

80

-

dBFS

79

89

-

dB

D-Range (−60dBFS, A-weighted)

-

100

-

dB

79

89

-

dB

S/N

(A-weighted)

-

100

-

dB

75

90

-

dB

Interchannel Isolation

-

100

-

dB

-

0

0.8

dB

Interchannel Gain Mismatch

-

0

0.8

dB

Note 9. Output voltage is proportional to AVDD voltage. Vout = 0.8 x AVDD (typ)

Note 10. Input voltage is proportional to AVDD voltage. Vin = 0.07 x AVDD (typ) @MGAIN3-0 bits = “0001” (+20dB),

Vin = 0.7 x AVDD (typ) @MGAIN3-0 bits = “0000” (0dB)

Note 11. MGAIN3-0 bits = “0001” (+20dB)

Note 12. MGAIN3-0 bits = “0000” (0dB)

MS1023-E-01

-8-

2010/08