AD1887JST datasheet(2/16 Pages) AD

Nome de Peças	AD1887JST

Descrição Electrónicos	AC??7 SoundMAX Codec

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Fabricante Electrônico	AD [Analog Devices]

Página de início	http://www.analog.com

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REV. 0

–2–

AD1887–SPECIFICATIONS

ANALOG INPUT

Parameter

Min

Typ

Max

Unit

Input Voltage (RMS Values Assume Sine Wave Input)

LINE_IN, CD

1V rms

2.83

V p-p

MIC with 20 dB Gain

0.1

V rms

0.283

V p-p

MIC with 0 dB Gain

1V rms

2.83

V p-p

Input Impedance*

20

k

Ω

Input Capacitance*

5

7.5

pF

HEADPHONE OUT VOLUME

Parameter

Min

Typ

Max

Unit

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

1.5

dB

Output Attenuation Range Span*

–94.5

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 HP_OUT

90

dB

Other to HP_OUT

90

dB

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

MIC, LINE_IN, CD, DAC

1.5

dB

Input Gain/Attenuation Range:

MIC, LINE_IN, CD, DAC

–46.5

dB

DIGITAL DECIMATION AND INTERPOLATION FILTERS

*

Parameter

Min

Typ

Max

Unit

Pass Band

0

0.4

× fS

Hz

Pass-Band Ripple

±0.09

dB

Transition Band

0.4

× fS

0.6

× fS

Hz

Stop Band

0.6

× fS

∞

Hz

Stop-Band Rejection

–74

dB

Group Delay

12/fS

sec

Group Delay Variation over Pass Band

0.0

µs

*Guaranteed but not tested.

STANDARD TEST CONDITIONS UNLESS OTHERWISE NOTED

Temperature

25

°C

Digital Supply (VDD)

3.3 V

Analog Supply (VCC)

5.0 V

Sample Rate (fS)

48 kHz

Input Signal

1008 Hz

Analog Output Pass Band

20 Hz to 20 kHz

VIH

2.0 V

VIL

0.8 V

VIH (CS0, CS1)

4.0 V

VIL

1.0 V

DAC Test Conditions

Calibrated

–3 dB Attenuation Relative to Full Scale

Input 0 dB

32

Ω Output Load (HP_OUT)

ADC Test Conditions

Calibrated

0 dB Gain

Input –3.0 dB Relative to Full Scale

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