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AKD4644 Datasheet(PDF) 9 Page - Asahi Kasei Microsystems |
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AKD4644 Datasheet(HTML) 9 Page - Asahi Kasei Microsystems |
9 / 96 page ASAHI KASEI [AK4644] MS0477-E-01 2006/10 - 9 - Parameter min typ max Units Headphone-Amp Characteristics: DAC → HPL/HPR pins, ALC=OFF, IVOL=0dB, DVOL=0dB Output Voltage (Note 15) HPG bit = “0”, 0dBFS, HVDD=3.3V, RL=22.8Ω 1.58 1.98 2.38 Vpp HPG bit = “1”, 0dBFS, HVDD=5V, RL=100Ω 2.40 3.00 3.60 Vpp HPG bit = “1”, 0dBFS, HVDD=3.3V, RL=16Ω (Po=62mW) - 1.0 - Vrms HPG bit = “1”, 0dBFS, HVDD=5V, RL=16Ω (Po=70mW) - 1.06 - Vrms S/(N+D) HPG bit = “0”, −3dBFS, HVDD=3.3V, R L=22.8Ω 60 70 - dBFS HPG bit = “1”, −3dBFS, HVDD=5V, R L=100Ω - 80 - dBFS HPG bit = “1”, 0dBFS, HVDD=3.3V, RL=16Ω (Po=62mW) - 20 - dBFS HPG bit = “1”, 0dBFS, HVDD=5V, RL=16Ω (Po=70mW) - 70 - dBFS (Note 16) 80 90 - dB S/N (A-weighted) (Note 17) - 90 - dB Interchannel Isolation (Note 16), PMAINL2/R2/L3/R3 bits = “1” 65 75 - dB (Note 16), PMAINL2/R2/L3/R3 bits = “0” - 75 - dB (Note 17) - 80 - dB (Note 16) - 0.1 0.8 dB Interchannel Gain Mismatch (Note 17) - 0.1 0.8 dB Load Resistance 16 - - Ω C1 in Figure 2 - - 30 pF Load Capacitance C2 in Figure 2 - - 300 pF Mono Input: MIN pin (AIN3 bit = “0”; External Input Resistance=20kΩ) Maximum Input Voltage (Note 18) - 1.98 - Vpp Gain (Note 19) MIN LOUT/ROUT LOVL bit = “0” −4.5 0 +4.5 dB LOVL bit = “1” - +2 - dB MIN HPL/HPR HPG bit = “0” −24.5 −20 −15.5 dB HPG bit = “1” - −16.4 - dB Note 15. Output voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD(typ)@HPG bit = “0”, 0.91 x AVDD(typ)@HPG bit = “1”. Note 16. HPG bit = “0”, HVDD=3.3V, RL=22.8Ω. Note 17. HPG bit = “1”, HVDD=5V, RL=100Ω. Note 18. Maximum voltage is in proportion to both AVDD and external input resistance (Rin). Vin = 0.6 x AVDD x Rin / 20k Ω (typ). Note 19. The gain is in inverse proportion to external input resistance. HPL/HPR pin HP-Amp 47 µF C1 16 Ω C2 6.8 Ω 0.22 µF 10 Ω Measurement Point Figure 2. Headphone-Amp output circuit |
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