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WM8904ECS/R Datasheet(PDF) 14 Page - Wolfson Microelectronics plc |
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WM8904ECS/R Datasheet(HTML) 14 Page - Wolfson Microelectronics plc |
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14 / 188 page  WM8904 Pre-Production w PP, Rev 3.3, September 2012 14 Single-ended Stereo Record from Analogue Microphones - IN2L / IN2R pins to ADC output Test conditions: L_MODE = R_MODE = 00b (Single ended) LIN_VOL = RIN_VOL = 11111b (+28.3dB) Total signal path gain = +34.3dB, incorporating 6dB single-ended to differential conversion gain PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Single-ended mic input full-scale Signal Level (for ADC 0dBFS output) 0.019 -34.3 0.055 Vrms dBV Vpk-pk Input Resistance Rin 9 12 k Input Capacitance Cin 10 pF Signal to Noise Ratio SNR A-weighted ADC_OSR128 = 0 ADC_128_OSR_TST_ MODE = 1 ADC_BIASx1P5 = 1 65 dB A-weighted Best performance mode:: ADC_OSR128 = 1 ADC_128_OSR_TST_ MODE = 0 ADC_BIASx1P5 = 0 73 Total Harmonic Distortion + Noise THD+N -35.3dBV input -69 dB Channel Level Matching 1kHz signal, -35.3dBV +/-3 dB Power Supply Rejection Ratio PSRR 217Hz, 100mVpk-pk 45 dB 1kHz, 100mV pk-pk 55 |
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