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WM8351 датащи(PDF) 16 Page - Wolfson Microelectronics plc |
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WM8351 датащи(HTML) 16 Page - Wolfson Microelectronics plc |
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16 / 330 page ![]() WM8351 Production Data w PD, April 2012, Rev 4.5 16 7 ELECTRICAL CHARACTERISTICS 7.1 HI-FI AUDIO CODEC Test Conditions DCVDD = 1.8V, AVDD = HPVDD = 3.3V, TA = +25 oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Microphone Preamp Inputs (IN1LP, IN1LN, IN1RP, IN1RN) Full-scale Input Signal Level (0dB) – note this changes with AVDD VINFS 1 0 V rms dBV Mic preamp equivalent input noise At 35.25dB gain 150 μV Input resistance RMICIN Gain set to 35.25dB 2.3 k Input resistance RMICIN Gain set to 0dB 64 k Input resistance RMICIN Gain set to -12dB 101 k Input Capacitance CMICIN 2 pF Recommended decoupling cap CDECOUP 0.33 μF MIC Programmable Gain Amplifier (PGA) Programmable Gain -12 35.25 dB Programmable Gain Step Size Monotonic 0.75 dB Mute Attenuation -90 dB Selectable Input Gain Boost (0/+20dB) Gain Boost 0 20 dB Auxiliary Analogue Inputs (IN3L, IN3R) Full-scale Input Signal Level (0dB) – note this changes with AVDD VINFS 1.0 0 Vrms dBV PGA gain range to summer -12 +6 dB PGA step size to summer 3 dB Input Resistance RAUXIN 32 k Input Capacitance CAUXIN 10 pF Analogue to Digital Converter (ADC) Signal to Noise Ratio (Note 1, 2) A-weighted, 0dB gain 86 95 dB Total Harmonic Distortion (Note 4) -2dBV Input -75 -83 dB Digital to Analogue Converter (DAC) to Line-Out (OUT1L, OUT1R with 10k / 50pF load) Full-scale output PGA gains set to 0dB HPVDD/3.3 Vrms Signal to Noise Ratio (Note 1, 2) SNR A-weighted 90 95 dB Total Harmonic Distortion (Note 3) THD+N RL = 10k full-scale signal -75 -81 dB Channel Separation (Note 4) 1kHz signal 89 dB Output Mixers PGA gain range into mixer -15 0 +6 dB PGA gain step into mixer 3 dB Analogue Output PGAs (OUT1L, OUT1R, OUT2L, OUT2R) Programmable Gain range -57 0 +6 dB Programmable Gain step size Monotonic 1 dB Mute attenuation 1kHz, full scale signal 78 dB |
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