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XWM8731EDS Datasheet(PDF) 9 Page - Wolfson Microelectronics plc |
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XWM8731EDS Datasheet(HTML) 9 Page - Wolfson Microelectronics plc |
9 / 56 page WM8731 Advanced Information WOLFSON MICROELECTRONICS LTD AI Rev 2.0 February 2001 9 Test Conditions AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25 oC, Slave Mode, fs = 48kHz, XTI/MCLK = 256fs unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Programmable Gain Boost MICBOOST bit set 1kHz input Rsource < 50 Ohms 34 dB Mic Path gain (MICBOOST gain is additional to this nominal gain) MICBOOST = 0 Rsource < 50 Ohms 14 dB Mute attenuation 0dB, 1kHz input 80 dB Input Resistance RINMIC 8k 10k 12k Ohms Input Capacitance CINMIC 10 pF Microphone Bias Bias Voltage VMICBIAS .75*AVDD – 100mV 0.75*AVDD .75*AVDD + 100mV V Bias Current Source IMICBIAS 3mA Output Noise Voltage Vn 1K to 20kHz 25 nV/ √Hz Line Output for DAC Playback Only (Load = 10k ohms. 50pF) 0dBfs Full scale output voltage At LINE outputs 1.0 x AVDD/3.3 Vrms SNR (Note 1,2,3) A-weighted, @ fs = 48kHz 90 100 dB SNR (Note 1,2,3) A-weighted @ fs = 96kHz 98 dB SNR (Note 1,2,3) A-weighted, @ fs = 48kHz, AVDD = 2.7V 93 dB Dynamic Range (Note 3) DR A-weighted, -60dB full scale input 85 90 dB 1kHz, 0dBfs -88 -80 dB THD 1kHz, -3dBfs -92 -86 dB Power Supply Rejection Ratio PSSR 1kHz 100mVpp 50 dB 20Hz to 20kHz 100mVpp 45 dB DAC channel separation 100 dB Analogue Line Input to Line Output (Load = 10k ohms. 50pF, No Gain on Input ) Bypass Mode 0dB Full scale output voltage 1.0 x AVDD/3.3 Vrms SNR (Note 1, 3) 90 95 dB 1kHz, 0dB -86 -80 dB THD 1kHz, -3dB -92 -86 dB Power Supply Rejection Ratio PSSR 1kHz 100mVpp 50 dB 20Hz to 20kHz 100mVpp 45 dB Mute attenuation 1kHz, 0dB 80 dB Stereo Headphone Output 0dB Full scale output voltage 1.0 x AVDD/3.3 Vrms Max Output Power RL = 32 ohms PO 30 mW Max Output Power RL = 16 ohms PO 40 mW |
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