Analog Devices AD1887, Руководство пользователя

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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 1 V 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 1 V 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
×
f
S
Hz
Pass-Band Ripple
±
0.09 dB
Transition Band 0.4
×
f
S
0.6
×
f
S
Hz
Stop Band 0.6
×
f
S
∞
Hz
Stop-Band Rejection –74 dB
Group Delay 12/f
S
sec
Group Delay Variation over Pass Band 0.0
µ
s
*
Guaranteed but not tested.
STANDARD TEST CONDITIONS UNLESS OTHERWISE NOTED
Temperature 25
°
C
Digital Supply (V
DD
) 3.3 V
Analog Supply (V
CC
) 5.0 V
Sample Rate (f
S
) 48 kHz
Input Signal 1008 Hz
Analog Output Pass Band 20 Hz to 20 kHz
V
IH
2.0 V
V
IL
0.8 V
V
IH
(CS0, CS1) 4.0 V
V
IL
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