AD1985 데이터 시트보기 (PDF) - Analog Devices

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AD1985

AC ’97 SoundMAX® Codec

Analog Devices 

AD1985

SPECIFICATIONS

Table 1. Test Conditions, Unless Otherwise Noted

Parameter

Value/Condition

Unit

TEMPERATURE

25

°C

DIGITAL SUPPLY (DVDD)

3.3

V

ANALOG SUPPLY (AVDD)

5.0

V

SAMPLE RATE (fS)

48

kHz

INPUT SINE WAVE SIGNAL

1,008

Hz

ANALOG OUTPUT PASS BAND 20 to 20,000

Hz

DAC TEST CONDITIONS

Calibrated

Output –3 dB relative to full scale

10 kΩ output load: line

32 Ω output load: headphone

2 kΩ output load: center and LFE

47.5 kΩ output load: mono

ADC TEST CONDITIONS

Calibrated

0 dB PGA gain

Input –3 dB relative to full scale

CLOCK

24.576 MHz

ANALOG INPUT

Table 2.

Parameter

Min

INPUT VOLTAGE

LINE_IN, CD, AUX, PHONE_IN

MIC_IN with +30 dB Preamp

MIC_IN with +20 dB Preamp

MIC_IN with +10 dB Preamp

MIC_IN with 0 dB Preamp

Input Impedance1

Input Capacitance1

MASTER VOLUME

Table 3.

Parameter

Min

STEP SIZE (LINE OUT, MONO OUT, SURROUND OUT, CENTER, LFE)

OUTPUT ATTENUATION RANGE (0 dB TO −46.5 dB)

MUTE ATTENUATION OF 0 dB FUNDAMENTAL1

80

PROGRAMMABLE GAIN AMPLIFIER—ADC

Table 4.

Parameter

Min

STEP SIZE (0 dB TO +22.5 dB)

PGA GAIN RANGE

1 Guaranteed, not tested.

Rev. A | Page 4 of 48

Typ

1

2.83

0.032

0.089

0.1

0.283

0.316

0.894

1

2.83

20

5

Max

Unit

V rms

V p-p

V rms

V p-p

V rms

V p-p

V rms

V p-p

V rms

V p-p

kΩ

7.5

pF

Typ

Max

Unit

1.5

dB

46.5

dB

dB

Typ

Max

Unit

1.5

dB

22.5

dB

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