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AKD4649 Datasheet(PDF) 9 Page - Asahi Kasei Microsystems |
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AKD4649 Datasheet(HTML) 9 Page - Asahi Kasei Microsystems |
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9 / 96 page  [AK4649] MS1023-E-01 2010/08 - 9 - Parameter min typ max Units DAC Characteristics: Resolution - - 24 Bits Stereo Line Output Characteristics: DAC → LOUT, ROUT pins, ALC=OFF, DVOL=OVOL=DATT=0dB, LOVL1-0 bit = “00”, RL=10kΩ Output Voltage (Note 13) LOVL1-0 bit = “00” 2.08 2.31 2.54 Vpp LOVL1-0 bit = “01” 2.62 2.91 3.20 Vpp S/(N+D) ( −3dBFS) 77 87 - dBFS S/N (A-weighted) 87 97 - dB Interchannel Isolation 85 100 - dB Interchannel Gain Mismatch - 0 0.8 dB Load Resistance 10 - - k Ω Load Capacitance - - 30 pF Speaker-Amp Characteristics: DAC → SPP/SPN pins, ALC=OFF, DVOL=OVOL=DATT=0dB, RL=8Ω, BTL Output Voltage (Note 14) SPKG1-0 bits = “00”, −0.5dBFS (Po=150mW) - 3.18 - Vpp SPKG1-0 bits = “01”, −0.5dBFS (Po=250mW) 3.20 4.00 4.80 Vpp SPKG1-0 bits = “10”, −0.5dBFS (Po=400mW) - 1.79 - Vrms S/(N+D) SPKG1-0 bits = “00”, −0.5dBFS (Po=150mW) - 60 - dB SPKG1-0 bits = “01”, −0.5dBFS (Po=250mW) 20 50 - dB SPKG1-0 bits = “10”, −0.5dBFS (Po=400mW) - 20 - dB S/N (A-weighted) 88 98 - dB Load Resistance 8 - - Ω Load Capacitance - - 30 pF Note 13. Output voltage is proportional to AVDD voltage. Vout = 0.7 x AVDD (typ) @LOVL1-0 bit = “00”. Note 14. Output voltage is proportional to AVDD voltage. In case of Full-differential (DAC Input Level = 0dBFS), Vout = 1.02 x AVDD (typ) @SPKG1-0 bits = “00”, 1.28 x AVDD (typ) @SPKG1-0 bits = “01”, 1.62 x AVDD (typ ) @ SPKG1-0 bits = “10”. The output level is calculated by assuming that output signal is no clipped. In the actual case, output signal may be clipped when DAC outputs 0dBFS signal. Therefore, DAC output level should be set to lower level by setting digital volume so that Speaker-Amp output level is not clipped. |
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