ad1988a Analog Devices, Inc., ad1988a Datasheet - Page 4

• Manufacturer Part Number: ad1988a
• Description: High Definition Audio Soundmax Codec
• Manufacturer: Analog Devices, Inc.

AD1988A/AD1988B
SPECIFICATIONS
TEST CONDITIONS
Test Conditions for the AD1988A and AD1988B are as follows, unless otherwise noted.
Analog Input/Output Conditions
Temperature at 25°C
Digital supply (DV
Analog supply (AV
MIC_BIAS_FILT at 5.0 V ±5%
Sample rate (F
Input signal at 1008 Hz
Analog output pass band at 20 Hz to 20 kHz
Table 1.
Parameter
DIGITAL DECIMATION AND INTERPOLATION FILTERS
ANALOG-TO-DIGITAL CONVERTERS
DIGITAL-TO-ANALOG CONVERTERS
DAC VOLUMES—PROGRAMMABLE GAIN ATTENUATOR
ADC VOLUMES—PROGRAMMABLE GAIN
AMPLIFIER/ATTENUATOR
ANALOG MIXER—PROGRAMMABLE GAIN
AMPLIFIER/ATTENUATOR
Pass Band
Pass-Band Ripple
Stop Band
Stop Band Rejection
Group Delay
Group Delay Variation over Pass Band
Resolution
Gain Error
Interchannel Gain Mismatch
ADC Offset Error
ADC Crosstalk
LINE_IN to Other
Resolution
Gain Error
Interchannel Gain Mismatch
Total Out-of-Band Energy
DAC Crosstalk
Step Size
Output Gain/Attenuation Range
Step Size
PGA Gain/Attenuation Range
Signal-to-Noise Ratio (SNR)
Step Size
Input Gain/Attenuation Range
Line Inputs
1
1
S
) at 48 kHz
1
1
DD
DD
) at 3.3 V ±10%
) at 3.3 V ±5%
1
1, 2
1
Conditions/Comments
f
Full-scale span relative to nominal input
voltage
Difference of gain errors
Input L, Ground R, Read R;
Input R, Ground L, Read L
Full-scale span relative to nominal input
voltage
Difference of gain errors
To 100 kHz
Input L, Zero R, Read R;
Input R, Zero L, Read L
DAC_0, DAC_1, DAC_2, DAC_3, DAC_4
ADCSEL_0, ADCSEL_1, ADCSEL_2
Input to output (including CD in)
All mixer inputs
All mixer inputs
S
8 kHz ~ 192 kHz
Rev. 0 | Page 4 of 20
DAC Conditions
Calibrated
Output −3 dB relative to full scale
10 kΩ output load: line out tests
32 Ω output load: headphone tests
ADC Conditions
Calibrated
0 db PGA gain
Input −3.0 dB relative to full scale
Min
0
0.60 f
−58.5
−58.5
−34.5
S
AD1988A/
AD1988B Max
20
0
24
±0.2
−85
−100
24
±0.2
−85
−95
+1.5
+1.5
95/96
+1.5
Typ
0.40 f
±0.005 dB
−100
±10
±0.5
±5
−80
±10
±0.5
0
+22.5
+12.0
S
Unit
Hz
Hz
dB
1/f
μs
Bits
%
dB
mV
dB
dB
Bits
%
dB
dB
dB
dB
dB
dB
dB
dB
dB
S