LM4546VHX National Semiconductor, LM4546VHX Datasheet - Page 8

• Manufacturer Part Number: LM4546VHX
• Description: IC AUDIO CODEC '97 18BIT 48LQFP
• Manufacturer: National Semiconductor
• Type: Audio Codec '97r

Specifications of LM4546VHX

• Data Interface: Serial
• Resolution (bits): 18 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 90 / 89
• Voltage - Supply, Analog: 4.2 V ~ 5.5 V
• Voltage - Supply, Digital: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM4546VHX

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LINE_OUT_R
LINE_OUT_L
MONO_OUT
LINE_IN_R
LINE_IN_L
CD_GND
Name
CD_R
MIC1
MIC2
Pin
19
20
21
22
23
24
35
36
37
I / O
O
O
O
I
I
I
I
I
I
Functional Description
This input can be used to reject common mode signals on the CD_L and CD_R inputs. CD_GND
is an AC ground point and not a DC ground point. This input must be AC-coupled to the source
signal's ground.
This line level input can be routed through the input mux and recorded by the right ADC. In addition,
this analog input gets summed into the right output stream. The amount of CD_R signal mixed in
the right output stream can be adjusted from +12dB to −34.5dB in 1.5dB steps as well as muted
via register 12h.
Either MIC1 or MIC2 can be selected via software and routed through the input mux for recording.
The 20dB boost circuit is enabled/disabled via register 0Eh. Also, the amount of mic signal mixed
in the output stream can be adjusted from +12dB to −34.5dB in 1.5dB steps as well as muted via
register 0Eh.
Either MIC1 or MIC2 can be selected via software and routed through the input mux for recording.
The 20dB boost circuit is enabled/disabled via register 0Eh. Also, the amount of mic signal mixed
in the output stream can be adjusted from +12dB to −34.5dB in 1.5dB steps as well as muted via
register 0Eh.
This line level input can be routed through the input mux and recorded by the left ADC. In addition,
this analog input gets summed into the left output stream. The amount of LINE_IN_L signal mixed
in the left output stream can be adjusted from +12dB to −34.5dB in 1.5dB steps as well as muted
via register 10h.
This line level input can be routed through the input mux and recorded by the right ADC. In addition,
this analog input gets summed into the right output stream. The amount of LINE_IN_R signal mixed
in the right output stream can be adjusted from +12dB to −34.5dB in 1.5dB steps as well as muted
via register 10h.
This is a post-mixed output for the left audio channel. The level of this output can be adjusted from
0dB to −45dB in 1.5dB steps as well as muted via register 02h.
This is a post-mixed output for the right audio channel. The level of this output can be adjusted
from 0dB to −45dB in 1.5dB steps as well as muted via register 02h.
This line level output can be switched between outputting the post-mixed combined left and right
outputs or the mic signal. The level of this output can be adjusted from 0dB to −45dB in 1.5dB steps
as well as muted via register 06h.
100985 Version 4 Revision 1
Print Date/Time: 2009/04/29 09:52:43
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