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WM8722 数据表(PDF) 4 Page - Wolfson Microelectronics plc |
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WM8722 数据表(HTML) 4 Page - Wolfson Microelectronics plc |
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4 / 23 page  WM8722 Advanced Information WOLFSON MICROELECTRONICS LTD AI Rev 1.5 May 2000 4 ELECTRICAL CHARACTERISTICS Test Conditions AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25 oC, fs = 48kHz, SCKI = 256fs unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DAC Circuit Specifications SNR (Note 1 and 2) AVDD, DVDD = 5V, fs = 48kHz 92 102 dB AVDD, DVDD = 3.3V, fs = 48kHz AVDD, DVDD = 5V, fs = 96kHz 100 dB THD (Note 2) 0dB -95 -80 Dynamic range (Note 2) -60dB 102 dB Passband ±0.25dB 0.4535fs dB Stopband -3dB 0.491fs Passband ripple ±0.25 dB Stopband Attenuation f > 0.55fs - dB Channel Separation 100 dB Gain mismatch channel-to-channel ±1 ±5 %FSR Digital Logic Levels Input LOW level VIL 0.8 V Input HIGH level VIH 2.0 V Output LOW level VOL IOL = 2mA AVSS + 0.3V Output HIGH level VOH IOH = 2mA AVDD - 0.3V Analogue Output Levels Output level Into 10kohm, full scale 0dB, (5V supply) 1.1 Vrms Into 10kohm, full scale 0dB, (3.3V supply) 0.66 Vrms To midrail or AC coupled (5V supply) 1 kohms Minimum resistance load To midrail or AC coupled (3.3V supply) 600 ohms Maximum capacitance load 5V or 3.3V 100 pF Output DC level AVDD/2 V Reference Levels Potential divider resistance AVDD to CAP and CAP to AGND 90 kohms Voltage at CAP AVDD/2 POR POR threshold 1.2 1.6 2.0 V Analogue Mixer Specifications SNR 92 100 dB THD 1V rms output, Into 10kohm, 50pF load -96 -92 dB Dynamic Range 100 dB Channel Separation 100 dB Output voltage Into 10kohm 1.5 Vrms Output current source 23 mA Output current sink 1.5 2 mA Input voltage, MIXINL/R AC coupled 2 Vrms MIXINL/R input resistance 0dB 50 kohm MIXINL/R input resistance (at 12dB trim) 20 kohm |
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