AD1881 datasheet(2/26 Pages) AD

Il numero della parte	AD1881

Spiegazioni elettronici	AC??7 SoundMAX Codec

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Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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REV. 0

AD1881A–SPECIFICATIONS

ANALOG INPUT

Parameter

Min

Typ

Max

Unit

Input Voltage (RMS Values Assume Sine Wave Input)

LINE_IN, AUX, CD, VIDEO, PHONE_IN, PC_BEEP

1

V rms

2.83

V p-p

MIC with +20 dB Gain (M20 = 1)

0.1

V rms

0.283

V p-p

MIC with 0 dB Gain (M20 = 0)

1

V rms

2.83

V p-p

Input Impedance

*

20

k

Ω

Input Capacitance

*

5

7.5

pF

MASTER VOLUME

Parameter

Min

Typ

Max

Unit

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

1.5

dB

Output Attenuation Range Span

*

–94.5

dB

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

1.5

dB

Output Attenuation Range Span

*

–46.5

dB

Mute Attenuation of 0 dB Fundamental

*

80

dB

PROGRAMMABLE GAIN AMPLIFIER—ADC

Parameter

Min

Typ

Max

Unit

Step Size (0 dB to 22.5 dB)

1.5

dB

PGA Gain Range Span

22.5

dB

ANALOG MIXER—INPUT GAIN/AMPLIFIERS/ATTENUATORS

Parameter

Min

Typ

Max

Unit

Signal-to-Noise Ratio (SNR)

CD to LINE_OUT

90

dB

Other to LINE_OUT

90

dB

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

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

1.5

dB

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

–46.5

dB

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

3.0

dB

Input Gain/Attenuation Range: PC_BEEP

–45

dB

*Guaranteed, not tested.

Specifications subject to change without notice.

Temperature

25

°C

Digital Supply (VDD)

3.3

V

Analog Supply (VCC)

5.0

V

Sample Rate (FS)

48

kHz

Input Signal

1008

Hz

STANDARD TEST CONDITIONS UNLESS OTHERWISE NOTED

DAC Test Conditions

Calibrated

–3 dB Attenuation Relative to Full-Scale

Input 0 dB

10 k

Ω Output Load

ADC Test Conditions

Calibrated

0 dB Gain

Input –3.0 dB Relative to Full-Scale

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