AD1981B Analog Devices, AD1981B Datasheet - Page 2

• Manufacturer Part Number: AD1981B
• Description: AD1981B AC'97 SoundMAX® Codec
• Manufacturer: Analog Devices

AD1981B
STANDARD TEST CONDITIONS, UNLESS
OTHERWISE NOTED
Temperature
Digital Supply (VDD)
Analog Supply (VCC)
Sample Rate (FS)
Input Signal
Analog Output Pass Band
Parameter
ANALOG INPUT
MASTER VOLUME
PROGRAMMABLE GAIN AMPLIFIER—ADC
ANALOG MIXER—INPUT GAIN/AMPLIFIERS/ATTENUATORS
DIGITAL DECIMATION AND INTERPOLATION FILTERS
Input Voltage (rms Values Assume Sine Wave Input)
Input Impedance
Input Capacitance
Step Size (0 dB to –46.5 dB): LINE_OUT_L, LINE_OUT_R
Output Attenuation Range
Step Size (0 dB to –46.5 dB): MONO_OUT
Output Attenuation Range
Step Size (0 dB to –46.5 dB): HP_OUT_R, HP_OUT_L
Output Attenuation Range Span
Mute Attenuation of 0 dB Fundamental
Step Size (0 dB to 22.5 dB)
PGA Gain Range
Signal-to-Noise Ratio (SNR)
Step Size (+12 dB to –34.5 dB) (All Steps Tested):
Input Gain/Attenuation Range:
Pass Band
Pass-Band Ripple
Transition Band
Stop Band
Stop-Band Rejection
Group Delay
Group Delay Variation over Pass Band
LINE_IN, AUX, CD, PHONE_IN
MIC_IN with +20 dB Gain
MIC_IN with 0 dB Gain
CD to LINE_OUT
Other to LINE_OUT
MIC_IN, LINE_IN, CD, AUX, PHONE_IN, DAC
MIC_IN, LINE_IN, CD, AUX, PHONE_IN, DAC
–SPECIFICATIONS
1
1
1
1
1
1
25°C
3.3 V
5.0 V
48 kHz
1008 Hz
20 Hz to 20 kHz
1
DAC Test Conditions
Calibrated
–3 dB Attenuation Relative to Full Scale
0 dB Input
10 kΩ Output Load (LINE_OUT)
32 Ω Output Load (HP_OUT)
ADC Test Conditions
Calibrated
0 dB Gain
Input –3.0 dB Relative to Full Scale
–2–
1
Min
80
0
0.4
0.6
–74
f
f
S
S
Typ
1
2.83
0.1
0.283
1
2.83
20
5
1.5
46.5
1.5
46.5
1.5
46.5
1.5
22.5
90
90
1.5
46.5
16/f
0
S
Max
7.5
0.4
± 0.09
0.6
f
f
S
S
REV. A
Unit
V rms
V p-p
V rms
V p-p
V rms
V p-p
kΩ
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Hz
dB
Hz
Hz
dB
sec
µs