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LM4546BVH データシート(PDF) 9 Page - Texas Instruments

部品番号 LM4546BVH
部品情報  LM4546B AC 97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and Texas Instruments 3D Sound
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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LM4546BVH データシート(HTML) 9 Page - Texas Instruments

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DVDD1
XTL_OUT
SDATA_OUT
48
1
47 46
2
3
4
5
XTL_IN
DVSS1
45
6
7
8
9
10
11
12
LM4546B
$& µ97 Rev 2.1
Codec
36
35
34
33
32
31
30
29
28
27
26
25
BIT_CLK
SDATA_IN
SYNC
RESET#
PC_BEEP
DVDD2
DVSS2
LINE_OUT_R
3DP
NC
LINE_OUT_L
3DN
NC
NC
AVSS
NC
VREF
VREF_OUT
AVDD
44 43 42 41 40 39 38 37
13 14 15 16 17 18 19 20 21 22 23 24
LM4546B
www.ti.com
SNOSAI4F – JUNE 2005 – REVISED MAY 2013
Connection Diagram
Figure 6. See Package Number PT0048A (Top View)
PIN DESCRIPTIONS
Table 1. ANALOG I/O
Name
Pin
I / O
Functional Description
Mono Input
This line level (1 Vrms nominal) mono input is mixed equally into both channels of the Stereo Mix
PC_BEEP
12
I
signal at MIX2 under the control of the PC_Beep Volume control register, 0Ah. The PC_BEEP level
can be muted or adjusted from 0 dB to -45 dB in 3 dB steps. The Stereo Mix signal feeds both the
Line Out and Line Level Out analog outputs and is also selectable at the Record Select Mux.
Mono Input
This line level (1 Vrms nominal) mono input is mixed equally into both channels of the Stereo Mix
PHONE
13
I
signal at MIX2 under the control of the Phone Volume register, 0Ch. The PHONE level can be muted
or adjusted from +12 dB to -34.5 dB in 1.5 dB steps. The Stereo Mix signal feeds both the Line Out
and Line Level Out analog stereo outputs and is also selectable at the Record Select Mux.
Left Stereo Channel Input
This line level input (1 Vrms nominal) is selectable at the left channel of the stereo Input Mux for
conversion by the left channel ADC. It can also be mixed into the left channel of the Stereo Mix 3D
CD_L
18
I
signal at MIX1 under the control of the CD Volume register, 12h. The CD_L level can be muted (along
with CD_R) or adjusted from +12 dB to -34.5 dB in 1.5 dB steps. Stereo Mix 3D is mixed into the
Stereo Mix signal at MIX2 for access to the stereo outputs Line Out and Line Level Out.
AC Ground Reference
This input is the reference for the signals on both CD_L and CD_R. CD_GND is NOT a DC ground
and should be AC-coupled to the stereo source ground common to both CD_L and CD_R. The three
CD_GND
19
I
inputs CD_GND, CD_L and CD_R act together as a quasi-differential stereo input with CD_GND
providing AC common-mode feedback to reject ground noise. This can improve the input SNR for a
stereo source with a good common ground but precision resistors may be needed in any external
attenuators to achieve the necessary balance between the two channels.
Right Stereo Channel Input
This line level input (1 Vrms nominal) is selectable at the right channel of the stereo Input Mux for
conversion by the right channel ADC. It can also be mixed into the right channel of the Stereo Mix 3D
CD_R
20
I
signal at MIX1 under the control of the CD Volume register, 12h. The CD_R level can be muted (along
with CD_L) or adjusted from +12 dB to -34.5 dB in 1.5 dB steps. Stereo Mix 3D is combined into the
Stereo Mix signal at MIX2 for access to the stereo outputs Line Out and Line Level Out.
Copyright © 2005–2013, Texas Instruments Incorporated
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