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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8976 датащи(PDF) 8 Page - Wolfson Microelectronics plc |
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WM8976 датащи(HTML) 8 Page - Wolfson Microelectronics plc |
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8 / 108 page  WM8976 Pre-Production w PP Rev 3.0 April 2006 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 Digital to Analogue Converter (DAC) to Line-Out (LOUT1, ROUT1 with 10k Ω Ω Ω Ω / 50pF load) PGA gains set to 0dB, OUT34BOOST=0 AVDD/3.3 Full-scale output PGA gains set to 0dB, OUT34BOOST=1 1.5x (AVDD/3.3) Vrms Signal to Noise Ratio (Note 6) SNR A-weighted 98 dB Total Harmonic Distortion (Note 7) THD RL = 10k Ω full-scale signal -84 dB Channel Separation (Note 9) 1kHz signal 110 dB Output Mixers (LMX1, RMX1) PGA gain range into mixer -15 0 +6 dB PGA gain step into mixer 3 dB Analogue Outputs (LOUT1, ROUT1, LOUT2, ROUT2) Programmable Gain range -57 0 +6 dB Programmable Gain step size Monotonic 1 dB Mute attenuation 1kHz, full scale signal 85 dB Headphone Output (LOUT1, ROUT1 with 32 Ω Ω Ω Ω load) 0dB full scale output voltage AVDD/3.3 Vrms Signal to Noise Ratio SNR A-weighted 102 dB RL = 16 Ω, Po=20mW AVDD=3.3V 0.003 -92 % dB Total Harmonic Distortion THD RL = 32 Ω, Po=20mW AVDD=3.3V 0.008 - 82 % dB Speaker Output (LOUT2, ROUT2 with 8 Ω Ω Ω Ω bridge tied load, INVROUT2=1) SPKBOOST=0 SPKVDD/3.3 Vrms Full scale output voltage, 0dB gain. (Note 9) SPKBOOST=1 (SPKVDD/3.3)*1.5 Output Power PO Output power is very closely correlated with THD; see below PO =200mW, RL = 8 Ω, SPKVDD=3.3V 0.04 -68 % dB PO =320mW, RL = 8 Ω, SPKVDD=3.3V 1.0 -40 % dB PO =500mW, RL = 8 Ω, SPKVDD=5V 0.02 -74 % dB Total Harmonic Distortion THD PO =860mW, RL = 8 Ω, SPKVDD=5V 1.0 -40 % dB SPKVDD=3.3V, RL = 8 Ω 90 dB Signal to Noise Ratio SNR SPKVDD=5V, RL = 8 Ω 90 dB RL = 8 Ω BTL 80 dB Power Supply Rejection Ratio (50Hz-22kHz) PSRR RL = 8 Ω BTL SPKVDD=5V (boost) 69 dB OUT3/OUT4 outputs (with 10k Ω Ω Ω Ω / 50pF load) OUT3BOOST=0/ OUT4BOOST=0 SPKVDD/3.3 Vrms Full-scale output voltage, 0dB gain (Note 9) OUT3BOOST=1 OUT4BOOST=1 (SPKVDD/3.3)*1.5 Vrms Signal to Noise Ratio (Note 6) SNR A-weighted 98 dB Total Harmonic Distortion (Note 7) THD RL = 10 k Ω full-scale signal -84 dB Channel Separation (Note 8) 1kHz signal 100 dB |
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