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WM8903 Datasheet(PDF) 11 Page - Wolfson Microelectronics plc |
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WM8903 Datasheet(HTML) 11 Page - Wolfson Microelectronics plc |
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11 / 178 page  Production Data WM8903 w PD, Rev 4.5, June 2012 11 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 10 12 k Input Capacitance Cin 10 pF DC offset At ADC output with ADC_HPF_ENA=0 11864 LSBs (24-bit) 47 LSBs (16-bit) Signal to Noise Ratio SNR A-weighted 73 dBFS Total Harmonic Distortion THD -35dBV input -78 dBFS Total Harmonic Distortion + Noise THD+N -35dBV input -77 dBFS Channel Level Matching 1kHz signal, -35dBV +/-3 dB Power Supply Rejection Ratio PSRR 1kHz, 100mVpk-pk 60 dB 20kHz, 100mV pk-pk 40 Differential stereo record from analogue microphones - IN1L+IN2L / IN1R+IN2R pins to ADC output Test conditions: L_MODE = R_MODE = 10b (Differential mic) LIN_VOL = RIN_VOL = 00111b (+30dB) Total signal path gain = +30dB PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Differential Mic Input Full Scale Signal Level IN1L-IN2L / IN1R-IN2R (for ADC 0dBFS output) 0.032 -30 0.089 Vrms dBV Vpk-pk Input Resistance Rin 100 120 k Input Capacitance Cin 10 pF DC Offset At ADC output with ADC_HPF_ENA=0 189813 LSBs (24-bit) 742 LSBs (16-bit) Signal to Noise Ratio SNR A-weighted 75 dBFS Total Harmonic Distortion THD -31dBV input -78 dBFS Total Harmonic Distortion + Noise THD+N -31dBV input -72 dBFS Common Mode Rejection Ratio CMRR 1kHz, 100mVpk-pk 60 dB Channel Separation 1kHz signal, -31dBV 85 dB 10kHz signal, -31dBV 80 Channel Level Matching 1kHz signal, -31dBV +/-1 dB PSRR (Referred to Input) PSRR 1kHz, 100mVpk-pk 60 dB 20kHz, 100mV pk-pk 40 |
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