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WM8750LEFL/R データシート(PDF) 6 Page - Wolfson Microelectronics plc |
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WM8750LEFL/R データシート(HTML) 6 Page - Wolfson Microelectronics plc |
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6 / 56 page  WM8750L Product Preview PP Rev 1.77 May 2003 6 ELECTRICAL CHARACTERISTICS Test Conditions DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, TA = +25 oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Analogue Inputs (LINPUT1, RINPUT1, LINPUT2, RINPUT2, LINPUT3, RINPUT3) to ADC out AVDD = 3.3V 1.0 Full Scale Input Signal Level (for ADC 0dB Input at 0dB Gain) VINFS AVDD = 1.8V 0.545 V rms Selected for ADC, PGA gain = 0dB 12 20 Selected for ADC, PGA gain = +30dB 1 1.5 Selected for mixer TBD Input Resistance Input unused TBD k Ω Input Capacitance 10 pF AVDD = 3.3V 90 95 Signal to Noise Ratio (A-weighted) SNR AVDD = 1.8V 90 dB Dynamic Range -60dBFs 90 95 dB -0.5dBFs input, AVDD = 3.3V -90 0.003 -84 0.006 Total Harmonic Distortion THD -0.5dBFs input, AVDD = 1.8V -84 0.006 -74 0.02 dB % ADC Channel Separation 1kHz signal 85 dB Channel Matching 1kHz signal 0.2 dB Programmable Gain Amplifier (PGA) Programmable Gain -17.25 30 dB Programmable Gain Step Size Monotonic 0.5 0.75 1.0 dB Channel Matching 1kHz signal, 0dB Fs input 0.2 dB Automatic Level Control (ALC) Target Record Level -28.5 -6 dBFS Gain Hold Time tHLD 0, 2.67, 5.33, 10.67, … , 43691 (time doubles with each step) ms Gain Ramp-Up (Decay) Time tDCY 24, 48, 96, … , 2458 (time doubles with each step) ms Gain Ramp-Down (Attack) Time tATK MCLK = 12.288MHz 6, 12, 24, … , 6140 (time doubles with each step) ms DAC to Line-Out (L/ROUT2 with 10k : / 50pF load) AVDD=3.3V TBD 98 Signal to Noise Ratio (A-weighted) SNR AVDD=1.8V 95 dB AVDD=3.3V -95 Total Harmonic Distortion THD AVDD=1.8V -90 dB Channel Separation 1kHz signal 90 dB Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT) 0dB Full scale output voltage AVDD/3.3 Vrms Programmable Gain 1kHz signal -67 +6 dB Programmable Gain Steps Monotonic 80 steps Mute attenuation 1kHz, full scale signal 85 dB Channel Separation 80 90 dB |
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