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PCM3168APAPR Datasheet(PDF) 45 Page - Texas Instruments |
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PCM3168APAPR Datasheet(HTML) 45 Page - Texas Instruments |
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45 / 66 page  PCM3168A PCM3168A-Q1 www.ti.com ......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008 ZREV DAC Zero flag polarity select This bit controls the polarity of the zero flag pin. Default value: 0. ZREV DAC Zero flag polarity select 0 High for zero detect (default) 1 Low for zero detect DEC HEX B7 B6 B5 B4 B3 B2 B1 B0 71 47 ATDA07 ATDA06 ATDA05 ATDA04 ATDA03 ATDA02 ATDA01 ATDA00 72 48 ATDA17 ATDA16 ATDA15 ATDA14 ATDA13 ATDA12 ATDA11 ATDA10 73 49 ATDA27 ATDA26 ATDA25 ATDA24 ATDA23 ATDA22 ATDA21 ATDA20 74 4A ATDA37 ATDA36 ATDA35 ATDA34 ATDA33 ATDA32 ATDA31 ATDA30 75 4B ATDA47 ATDA46 ATDA45 ATDA44 ATDA43 ATDA42 ATDA41 ATDA40 76 4C ATDA57 ATDA56 ATDA55 ATDA54 ATDA53 ATDA52 ATDA51 ATDA50 77 4D ATDA67 ATDA66 ATDA65 ATDA64 ATDA63 ATDA62 ATDA61 ATDA60 78 4E ATDA77 ATDA76 ATDA75 ATDA74 ATDA73 ATDA72 ATDA71 ATDA70 79 4F ATDA87 ATDA86 ATDA85 ATDA84 ATDA83 ATDA82 ATDA81 ATDA80 ATDAx[7:0] DAC Digital attenuation level setting Where x = 0 and 1 to 8, corresponding to the DAC channel, DACx (x = 1 to 8). Each DAC channel (VOUTx) has a digital attenuator function. The attenuation level can be set from 0 dB to –100 dB in 0.5-dB steps, and also can be set to infinite attenuation (mute). The attenuation level change from current value to target value is performed by incrementing or decrementing with s-curve responses and a time set by ATSPDA. While an attenuation level change sequence is in progress, new processing of the attenuation level change for new commands are ignored; any new commands are overwritten into the command buffer. The last command for the attenuation level change is performed after the present attenuation level change sequence is finished. The attenuation level for each channel can be set individually using the following formula; the table below shows attenuation levels for various settings. Attenuation level (dB) = 0.5 × (ATDAx[7:0]DEC – 255), where ATDAx[7:0]DEC = 0 through 255 for ATDAx[7:0]DEC = 0 through 54, attenuation is set to infinite attenuation (Mute). ATDA0[7:0] are used to control all channels at the same time with attenuation data of ATDA0[7:0] + ATDAx[7:0] in decibel number, when ATMDDA is set to '1'. This scheme provides preset and master volume operation. Default value: 1111 1111. Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 45 Product Folder Link(s): PCM3168A PCM3168A-Q1 |
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