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WM8985GEFL 数据表(PDF) 13 Page - Wolfson Microelectronics plc |
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WM8985GEFL 数据表(HTML) 13 Page - Wolfson Microelectronics plc |
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13 / 118 page  Pre-Production WM8985 w PP, Rev 3.4, October 2006 13 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 LIN and RIN input PGA to input boost stage into 10k Ω / 50pF load on OUT3/OUT4 outputs INPPGAVOLL, INPPGAVOLR, PGABOOSTL and PGABOOSTR = 0dB Full-scale output voltage, 0dB gain AVDD2/3.3 Vrms A-weighted AVDD1=AVDD2=3.3V 90 98 dB A-weighted AVDD1=AVDD2=2.5V 96 dB 22Hz to 22kHz AVDD1=AVDD2=3.3V 95.5 dB Signal to Noise Ratio 3 SNR 22Hz to 22kHz AVDD1=AVDD2=2.5V 93.5 dB full-scale signal AVDD1=AVDD2=3.3V -84 dBFS Total Harmonic Distortion 4 THD full-scale signal AVDD1=AVDD2=2.5V -82 dBFS full-scale signal AVDD1=AVDD2=3.3V -82 dBFS Total Harmonic Distortion + Noise 5 THD+N full-scale signal AVDD1=AVDD2=2.5V -80 dBFS Channel Separation 6 100 dB LIN and RIN into input PGA Bypass to LOUT1 and ROUT1 into 10k Ω / 50pF loads BYPLMIXVOL, BYPRMIXVOL, LOUT1VOL and ROUT1VOL = 0dB Full-scale output voltage, 0dB gain AVDD1/3.3 Vrms A-weighted AVDD1=AVDD2=3.3V 90 100 dB A-weighted AVDD1=AVDD2=2.5V 96 dB 22Hz to 22kHz AVDD1=AVDD2=3.3V 95.5 dB Signal to Noise Ratio 3 SNR 22Hz to 22kHz AVDD1=AVDD2=2.5V 93.5 dB full-scale signal AVDD1=AVDD2=3.3V -87 -75 dBFS Total Harmonic Distortion 4 THD full-scale signal AVDD1=AVDD2=2.5V -69 dBFS full-scale signal AVDD1=AVDD2=3.3V -85 -73 dBFS Total Harmonic Distortion + Noise 5 THD+N full-scale signal AVDD1=AVDD2=2.5V -68 dBFS Channel separation 6 1kHz full scale signal 100 dB Microphone Bias MBVSEL=0 0.9*AVDD1 V Bias Voltage MBVSEL=1 0.65*AVDD1 V Bias Current Source for VMICBIAS within +/-3% 3 Ma Output Noise Voltage 1kHz to 20kHz 15 nV/ √Hz |
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