Input/Output Interfaces

5.8.5 Audio Specifications

The specifications for the HD Audio subsystem are listed in Table 5-24.

Table 5-24.

 

HD Audio Subsystem Specifications

 

 

Parameter

Measurement

 

 

Sampling Rates:

 

DAC

44.1-, 48-, 96-, & 192-KHz [1]

ADC

44.1-, 48-, & 96-KHz [1]

 

 

Resolution:

 

DAC

24-bit

ADC

20-bit

 

 

Nominal Input Voltage:

 

Mic In (w/+20 db gain)

.283 Vp-p

Line In

2.83 Vp-p

 

 

Subsystem Impedance (nominal):

 

Mic In

64K ohms

Line In

64K ohms

Line Out

200 ohms

Headphones Out

32 0hms

 

 

Signal-to-Noise Ratio

 

ADC

90 db (nom)

DAC

100 db (nom)

 

 

Total Harmonic Distortion (THD)

 

ADC

-82

DAC

-87

 

 

Max. Subsystem Power Output to 4-ohm Internal

1.5 watts

Speaker (with 10% THD):

 

 

 

Gain Step

1.5 db

 

 

Master Volume Range

-94.5 db

 

 

Frequency Response:

 

ADC/DAC

16 – 19,200 Hz

Internal Speaker

450–4000 Hz

NOTE:

[1] Device driver limitation: 48 KHz

 

5-32

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Technical Reference Guide