AD1885JST 查看數據表（PDF） - Analog Devices

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AD1885JST

AC’97 SoundMAX® Codec

Analog Devices 

AD1885–SPECIFICATIONS

STANDARD TEST CONDITIONS UNLESS OTHERWISE NOTED

Temperature

Digital Supply (DVDD)

Analog Supply (AVDD)

Sample Rate (FS)

Input Signal

Analog Output Passband

25

°C

3.3

V

5.0

V

48

kHz

1008

Hz

20 Hz to 20 kHz

DAC Test Conditions

Calibrated

–3 dB Attenuation Relative to Full Scale

Input 0 dB

10 kΩ Output Load (LINE_OUT)

32 Ω Output Load (HP_OUT)

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*

ADC Test Conditions

Calibrated

0 dB Gain

Input –3.0 dB Relative to Full Scale

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*

Step Size (+6 dB to –88.5 dB); HP_OUT_R, HP_OUT_L

Output Attenuation Range Span*

Mute Attenuation of 0 dB Fundamental*

Min

Typ

Max

1.5

–94.5

1.5

–46.5

1.5

–94.5

80

PROGRAMMABLE GAIN AMPLIFIER—ADC

Parameter

Step Size (0 dB to 22.5 dB)

PGA Gain Range Span

Min

Typ

Max

1.5

22.5

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.

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

dB

dB

Unit

dB

dB

Unit

dB

dB

dB

dB

dB

dB

–2–

REV. 0

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