AD1985 查看數據表（PDF） - Analog Devices

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AD1985

AC ’97 SoundMAX® Codec

Analog Devices 

AD1985

POWER-DOWN STATES1

Table 12.

Parameter

FULL POWER-UP

ADC

FRONT DAC

CENTER DAC

SURROUND DAC

LFE DAC

ADC + ALL DACs

MIXER

ADC + MIXER

ALL DACS + MIXER

ADC + ALL DACS + MIXER

STANDBY

HEADPHONE STANDBY

PR[K:I]2

000

000

000

001

010

100

111

000

000

111

111

111

000

PR[6:0]2

000 0000

000 0001

000 0010

000 0000

000 0000

000 0000

000 0011

000 0100

000 0101

000 0110

000 0111

011 1111

100 0000

I DVDD (3.3 V) Typ

55.5

47.4

49.5

55.5

49.0

55.1

15.8

55.5

47.4

34.1

14.3

0.114

55.5

I AVDD (5 V) Typ

Unit

56.0

mA

49.9

mA

47.9

mA

56.0

mA

47.5

mA

56.0

mA

24.2

mA

34.3

mA

27.4

mA

10.0

mA

2.5

mA

0.004

mA

48.3

mA

CLOCK SPECIFICATIONS

Table 13.

Parameter

Min

INPUT CLOCK FREQUENCY (XTAL MODE OR CLOCK OSCILLATOR)

INPUT CLOCK FREQUENCY (REFERENCE CLOCK MODE)

INPUT CLOCK FREQUENCY (USB CLOCK MODE)

RECOMMENDED CLOCK DUTY CYCLE

40

1 Currents measured with VREFOUT unloaded.

2 PR bits are controlled in Registers 0x2A and 0x26.

Typ

Max

24.576

14.31818

48.000

50

60

Unit

MHz

MHz

MHz

%

Rev. A | Page 7 of 48

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