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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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WM8976CGEFL/V 데이터시트(PDF) 8 Page - Wolfson Microelectronics plc |
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WM8976CGEFL/V 데이터시트(HTML) 8 Page - Wolfson Microelectronics plc |
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8 / 114 page  WM8976 Production Data w PD, Rev 4.5, November 2011 8 Test Conditions DCVDD=1.8V, AVDD=DBVDD=SPKVDD= 3.3V, TA = +25 oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Analogue to Digital Converter (ADC) Signal to Noise Ratio (Note 6) SNR A-weighted, 0dB gain 85 95 dB Total Harmonic Distortion (Note 7) THD -3dBFS input -84 -74 dB Digital to Analogue Converter (DAC) to Line-Out (LOUT1, ROUT1 with 10k / 50pF load) Full-scale output PGA gains set to 0dB, OUT34BOOST=0 AVDD/3.3 Vrms PGA gains set to 0dB, OUT34BOOST=1 1.5x (AVDD/3.3) Signal to Noise Ratio (Note 6) SNR A-weighted 90 98 dB Total Harmonic Distortion (Note 7) THD RL = 10k full-scale signal -84 -76 dB Channel Separation (Note 9) 1kHz signal 110 dB Output Mixers (LMX1, RMX1) Maximum PGA gain into mixer +6 dB Minimum PGA gain into mixer -15 dB PGA gain step into mixer Guaranteed monotonic 3 dB Analogue Outputs (LOUT1, ROUT1, LOUT2, ROUT2) Maximum Programmable Gain +6 dB Minimum Programmable Gain -57 dB Programmable Gain step size Guaranteed monotonic 1 dB Mute attenuation 1kHz, full scale signal 85 dB Headphone Output (LOUT1, ROUT1 with 32 load) 0dB full scale output voltage AVDD/3.3 Vrms Signal to Noise Ratio SNR A-weighted 102 dB Total Harmonic Distortion THD RL = 16, Po=20mW AVDD=3.3V 0.003 -92 % dB RL = 32 , Po=20mW AVDD=3.3V 0.008 - 82 % dB Speaker Output (LOUT2, ROUT2 with 8 bridge tied load, INVROUT2=1) Full scale output voltage, 0dB gain. (Note 9) SPKBOOST=0 SPKVDD/3.3 Vrms SPKBOOST=1 (SPKVDD/3.3)*1.5 Output Power PO Output power is very closely correlated with THD; see below Total Harmonic Distortion THD PO =200mW, RL = 8, SPKVDD=3.3V 0.04 -68 % dB PO =320mW, RL = 8, SPKVDD=3.3V 1.0 -40 % dB PO =500mW, RL = 8, SPKVDD=5V 0.02 -74 % dB PO =860mW, RL = 8, SPKVDD=5V 1.0 -40 % dB Signal to Noise Ratio SNR SPKVDD=3.3V, RL = 8 90 dB SPKVDD=5V, RL = 8 90 dB Power Supply Rejection Ratio (50Hz-22kHz) PSRR RL = 8 BTL 80 dB RL = 8 BTL SPKVDD=5V (boost) 69 dB |
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