AD1981B datasheet(2/28 Pages) AD

2 / 28 page

REV. B

–2–

AD1981B–SPECIFICATIONS

STANDARD TEST CONDITIONS, UNLESS

OTHERWISE NOTED

Temperature

°C

Digital Supply (DVDD)

3.3 V

Analog Supply (AVDD)

5.0 V

Sample Rate (FS)

48 kHz

Input Signal

1008 Hz

Analog Output Pass Band

20 Hz to 20 kHz

DAC Test Conditions

Calibrated

–3 dB Attenuation Relative to Full Scale

0 dB Input

10 k

Ω Output Load (LINE_OUT)

Ω Output Load (HP_OUT)

ADC Test Conditions

Calibrated

0 dB Gain

Input –3.0 dB Relative to Full Scale

Parameter

Min

Typ

Max

Unit

ANALOG INPUT

Input Voltage (RMS Values Assume Sine Wave Input)

LINE_IN, AUX, CD, PHONE_IN

V rms

2.83

V p-p

MIC_IN with +20 dB Gain

0.1

V rms

0.283

V p-p

MIC_IN with 0 dB Gain

V rms

2.83

V p-p

Input Impedance

Ω

Input Capacitance

7.5

MASTER VOLUME

Step Size (0 dB to –46.5 dB): LINE_OUT_L, LINE_OUT_R

1.5

Output Attenuation Range

46.5

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

1.5

Output Attenuation Range

46.5

Step Size (0 dB to –46.5 dB): HP_OUT_R, HP_OUT_L

1.5

Output Attenuation Range Span

46.5

Mute Attenuation of 0 dB Fundamental

PROGRAMMABLE GAIN AMPLIFIER—ADC

Step Size (0 dB to 22.5 dB)

1.5

PGA Gain Range

22.5

ANALOG MIXER—INPUT GAIN/AMPLIFIERS/ATTENUATORS

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_IN, LINE_IN, CD, AUX, PHONE_IN, DAC

1.5

Input Gain/Attenuation Range:

MIC_IN, LINE_IN, CD, AUX, PHONE_IN, DAC

46.5

DIGITAL DECIMATION AND INTERPOLATION FILTERS

Pass Band

0.4

Pass-Band Ripple

±0.09

Transition Band

0.4

0.6

Stop Band

0.6

Stop-Band Rejection

–74

Group Delay

16/fS

sec

Group Delay Variation over Pass Band

µs

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