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LM4546BVH データシート(PDF) 9 Page - Texas Instruments |
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LM4546BVH データシート(HTML) 9 Page - Texas Instruments |
9 / 37 page 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 Submit Documentation Feedback 9 Product Folder Links: LM4546B |
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同様の説明 - LM4546BVH |
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