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7. Audio DAC
7.1
Electrical Specifications
AVDD, AVDDHS = 2.8 V, T A = 25°C, typical case, unless otherwise noted.
All noise and distortion specifications are measured in the 20 Hz to 0.425xFs and A-weighted filtered.
Full-scale levels scale proportionally with the analog supply voltage.
Table 7-1.
Electrical Specifications
Min
Typ
Max
Units
Overall
Operating Temperature (ambient)
Analog Supply Voltage (AVDD, AVDDHS)
Digital Supply Voltage (VDIG)
-40
2.7
2.4
+25
2.8
2.8
+85
3.3
3.3
°C
V
V
DIGITAL INPUTS/OUTPUTS
Resolution
Logic Family
Logic Coding
Analog Performance - DAC to Line-out/Headphone Output
Output level for full scale input (for AVDD, AVDDHS = 2.8 V)
Output common mode voltage
Output load resistance (on HSL, HSR)
20
CMOS
2's Complement
1.65
0.5 x
AVDDHS
bits
Vpp
V
Headphone load
Line load
16
7
32
10
Ohm
kOhm
Output load capacitance (on HSL, HSR)
Headphone load
Line load
30
30
1000
150
pF
pF
Signal to Noise Ratio (-1dBFS @ 1kHz input and 0dB Gain)
Line and Headphone loads
87
92
dB
Total Harmonic Distortion (-1dBFS @ 1kHz input and 0dB Gain)
Line Load
Headphone Load
Headphone Load (16 Ohm)
0.01
0.06
0.5
0.016
0.1
1
%
%
%
Dynamic Range (measured with -60 dBFS @ 1kHz input,
extrapolated to full-scale)
Line Load
Headphone Load
88
70
93
74
dB
dB
Interchannel mismatch
Left-channel to right-channel crosstalk (@ 1kHz)
Output Headset Driver Level Control Range
Output Headset Driver Level Control Step
AT73C213
6
-6
0.1
-90
3
1
-80
6
dB
dB
dB
dB
2744B–PMAAC–11-Apr-08
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