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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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WM8985GEFL/R 데이터시트(PDF) 12 Page - Wolfson Microelectronics plc |
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WM8985GEFL/R 데이터시트(HTML) 12 Page - Wolfson Microelectronics plc |
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12 / 121 page  WM8985 Production Data w PD, Rev 4.6, July 2009 12 Test Conditions DCVDD=1.8V, AVDD1=AVDD2=DBVDD=3.3V, TA = +25 oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DAC to left and right mixer into headphone 16Ω load on LOUT2 and ROUT2, Class AB mode LOUT2VOL, ROUT2VOL, DACLVOL and DACRVOL = 0dB Full-scale output AVDD1/3.3 Vrms Signal to Noise Ratio 3 SNR A-weighted AVDD1=AVDD2=3.3V 90 97 dB 22Hz to 20kHz AVDD1=AVDD2=3.3V 95.5 dB Total Harmonic Distortion 4 THD Po = 20mW, RL=16Ω -80 -75 dB Total Harmonic Distortion + Noise 5 THD+N Po = 20mW, RL=16Ω -77 -70 dB Channel Separation 6 1kHz signal 100 dB DAC to left and right mixer into headphone 16Ω load on LOUT2 and ROUT2, Class D mode, Lfilter = 33uH Cfilter = 220nf LOUT2VOL, ROUT2VOL, DACLVOL and DACRVOL = 0Db Full-scale output AVDD1/3.3 Vrms Signal to Noise Ratio 3 SNR A-weighted AVDD1=AVDD2=3.3V 90 97 dB Total Harmonic Distortion 4 THD Po = 20mW, RL=16Ω -79 -75 dB Channel Separation 6 1kHz signal 100 dB PWM Rise Time 1.5 ns PWM Fall Time 1.5 ns PWM Switching Frequency DCLKDIV = 1000 1.4 MHz Efficiency RL = 16Ω, tPW = 20ns, PO = 20mW 72 % Power Supply Rejection PSRR 100mVpp ripple @217Hz injected on AVDD2 70 dB Idle Current No analogue output signal on either channel 0.5 mA Bypass paths to left and right output mixers. BYPL2LMIX = 1 and BYPR2RMIX = 1 Maximum PGA gain into mixer Gain adjusted by BYPLMIXVOL and BYPRMIXVOL +6 dB Minimum PGA gain into mixer Gain adjusted by BYPLMIXVOL and BYPRMIXVOL -15 dB BYPLMIXVOL and BYPRMIXVOL gain step into mixer Guaranteed monotonic 3 dB Mute attenuation BYPL2LMIX = 0 BYPR2RMIX = 0 100 dB Analogue outputs (LOUT1, ROUT1, LOUT2, ROUT2) Maximum Programmable Gain Gain adjusted by L/ROUT1VOL and L/ROUT2VOL +6 dB Minimum Programmable Gain Gain adjusted by L/ROUT1VOL and L/ROUT2VOL -57 dB Programmable Gain step size Guaranteed monotonic 1 dB Mute attenuation 1kHz, full scale signal L/ROUT1MUTE = 1 L/ROUT2MUTE = 1 85 dB |
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