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WM8998 Datasheet(PDF) 16 Page - Wolfson Microelectronics plc |
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WM8998 Datasheet(HTML) 16 Page - Wolfson Microelectronics plc |
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16 / 307 page  WM8998 Production Data w PD, October 2014, Rev 4.0 16 Test Conditions DBVDD1 = DBVDD2 = DBVDD3 = LDOVDD = CPVDD = AVDD = 1.8V, DCVDD = 1.2V (powered from LDO1), MICVDD = 3.0V (powered from LDO2), SPKVDDL = SPKVDDR = 4.2V, TA = +25ºC, 1kHz sinusoid signal, fs = 48kHz, Input PGA gain = 0dB, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Analogue Input Paths (IN1AL, IN1AR, IN1BL, IN1BR, IN2A, IN2B) to ADC (Differential Input Mode, INn_SRC = x0) Signal to Noise Ratio (A-weighted) SNR High performance mode (INn_OSR = 1) 87 96 dB Normal mode (INn_OSR = 0) 93 Total Harmonic Distortion THD -1dBV input -90 dB Total Harmonic Distortion Plus Noise THD+N -1dBV input -88 -79 dB Channel separation (Left/Right) 100 dB Input noise floor A-weighted, PGA gain = +18dB 3.2 µVRMS Common mode rejection ratio CMRR PGA gain = +30dB 65 dB PGA gain = 0dB 70 PSRR (DBVDDn, LDOVDD, CPVDD, AVDD) PSRR 100mV (peak-peak) 217Hz 70 dB 100mV(peak-peak) 10kHz 65 PSRR (SPKVDDL, SPKVDDR) PSRR 100mV (peak-peak) 217Hz 95 dB 100mV(peak-peak) 10kHz 95 Analogue Input Paths (IN1AL, IN1AR, IN1BL, IN1BR, IN2A, IN2B) to ADC (Single-Ended Input Mode, INn_SRC = x1) PGA Gain = +6dB unless otherwise stated. Signal to Noise Ratio (A-weighted) SNR High performance mode (INn_OSR = 1) 86 94 dB Normal mode (INn_OSR = 0) 92 Total Harmonic Distortion THD -7dBV input -82 dB Total Harmonic Distortion Plus Noise THD+N -7dBV input -81 -71 dB Channel separation (Left/Right) 100 dB Input noise floor A-weighted, PGA gain = +18dB 4.6 µVRMS PSRR (DBVDDn, LDOVDD, CPVDD, AVDD) PSRR 100mV (peak-peak) 217Hz 70 dB 100mV(peak-peak) 10kHz 50 PSRR (SPKVDDL, SPKVDDR) PSRR 100mV (peak-peak) 217Hz 85 dB 100mV(peak-peak) 10kHz 70 |
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