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LM4545 bảng dữ liệu(PDF) 8 Page - National Semiconductor (TI) |
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LM4545 bảng dữ liệu(HTML) 8 Page - National Semiconductor (TI) |
8 / 16 page Pin Descriptions (Continued) Analog I/O (Continued) Name Pin I / O Functional Description AUX_R 15 I 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 AUX_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 16h. VIDEO_L 16 I 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 VIDEO_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 14h. VIDEO_R 17 I 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 VIDEO_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 14h. CD_L 18 I 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 CD_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 12h. CD_GND 19 I This input can be used to reject common mode signals on the CD_L or CD_R inputs. CD_GND is an AC ground point not DC ground point. Thus, this input must be capacitively coupled and not directly coupled to analog ground. CD_R 20 I 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. MIC1 21 I 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. MIC2 22 I 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. LINE_IN_L 23 I 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. LINE_IN_R 24 I 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. LINE_OUT_L 35 O 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. LINE_OUT_R 36 O 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. MONO_OUT 37 O This line level output is either the post-mixed output or the mic input. The level of this output can be adjusted from 0dB to −45dB in 1.5dB steps as well as muted via register 06h. HP_OUT_L 39 O 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 04h. HP_OUT_L has a nominal gain of 9dB with respect to the left output mixer level and is designed for driving a 32 Ω impedance with minimal distortion. HP_OUT_C 40 I This input can be used to reject common mode signals on the headphone outputs. CD_GND is an AC ground point not DC ground point. Thus, this input must be capacitively coupled (not directly coupled) to analog ground. www.national.com 8 |
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Mô tả tương tự - LM4545 |
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