lm4549a National Semiconductor Corporation, lm4549a Datasheet - Page 14

• Manufacturer Part Number: lm4549a
• Description: Ac ?97 Rev 2.1 Multi-channel Audio Codec With Sample Rate Conversion And National 3d Sound
• Manufacturer: National Semiconductor Corporation

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Pin Descriptions
Typical Performance Characteristics
Name
NC
29, 30
31, 32
38, 40
42, 43
44, 48
Pin
(Analog Loopthrough)
Line Out Noise Floor
ADC Noise Floor
ADC Frequency
Response
I / O
NC
(Continued)
These pins are not used and should be left open (NC).
For second source applications these pins may be connected to a noise-free supply or
ground ( e.g. AV
3D SOUND AND NO-CONNECTS (NC) (Continued)
20029915
20029918
20029919
DD
or AV
SS
), either directly or through a capacitor.
14
Functional Description
Line Level Out Noise Floor
(Analog Loopthrough)
DAC Noise Floor
DAC Frequency
Response
20029916
20029931
20029920