AD1881A 查看數據表（PDF） - Analog Devices

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AD1881A

AC’97 SoundMAX® Codec

Analog Devices 

AD1881A–SPECIFICATIONS

STANDARD TEST CONDITIONS UNLESS OTHERWISE NOTED

Temperature

Digital Supply (VDD)

Analog Supply (VCC)

Sample Rate (FS)

Input Signal

25

°C

3.3

V

5.0

V

48

kHz

1008

Hz

DAC Test Conditions

Calibrated

–3 dB Attenuation Relative to Full-Scale

Input 0 dB

10 kΩ Output Load

ADC Test Conditions

Calibrated

0 dB Gain

Input –3.0 dB Relative to Full-Scale

ANALOG INPUT

Parameter

Input Voltage (RMS Values Assume Sine Wave Input)

LINE_IN, AUX, CD, VIDEO, PHONE_IN, PC_BEEP

MIC with +20 dB Gain (M20 = 1)

MIC with 0 dB Gain (M20 = 0)

Input Impedance*

Input Capacitance*

Min

Typ

Max

1

2.83

0.1

0.283

1

2.83

20

5

7.5

MASTER VOLUME

Parameter

Step Size (0 dB to –94.5 dB); LINE_OUT_L, LINE_OUT_R

Output Attenuation Range Span*

Step Size (0 dB to –46.5 dB); MONO_OUT

Output Attenuation Range Span*

Mute Attenuation of 0 dB Fundamental*

Min

Typ

Max

1.5

–94.5

1.5

–46.5

80

PROGRAMMABLE GAIN AMPLIFIER—ADC

Parameter

Step Size (0 dB to 22.5 dB)

PGA Gain Range Span

Min

Typ

1.5

22.5

Max

ANALOG MIXER—INPUT GAIN/AMPLIFIERS/ATTENUATORS

Parameter

Min

Signal-to-Noise Ratio (SNR)

CD to LINE_OUT

Other to LINE_OUT

Step Size (+12 dB to –34.5 dB): (All Steps Tested)

MIC, LINE_IN, AUX, CD, VIDEO, PHONE_IN, DAC

Input Gain/Attenuation Range: MIC, LINE, AUX, CD, VIDEO, PHONE_IN, DAC

Step Size (0 dB to –45 dB): (All Steps Tested) PC_BEEP

Input Gain/Attenuation Range: PC_BEEP

*Guaranteed, not tested.

Specifications subject to change without notice.

Typ

90

90

1.5

–46.5

3.0

–45

Max

Unit

V rms

V p-p

V rms

V p-p

V rms

V p-p

kΩ

pF

Unit

dB

dB

dB

dB

dB

Unit

dB

dB

Unit

dB

dB

dB

dB

dB

dB

–2–

REV. 0

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