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WM8980 Datasheet(PDF) 8 Page - Wolfson Microelectronics plc |
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WM8980 Datasheet(HTML) 8 Page - Wolfson Microelectronics plc |
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8 / 81 page  WM8980 Product Preview w PP Rev 1.6 January 2005 8 Test Conditions DCVDD=1.8V, AVDD=DBVDD=SPKVDD=VBVDD = 3.3V, TA = +25 oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Speaker Output (LOUT2, ROUT2 with 8 Ω Ω Ω Ω bridge tied load, INVROUT2=1) SPKRBOOST=0 SPKVDD/3.3 Vrms Full scale output voltage, 0dB gain. (Note 10) SPKRBOOST=1 (SPKVDD/3.3)*1.5 Output Power PO Output power is very closely correlated with THD; see below PO =180mW, RL = 8 Ω, SPKVDD=3.3V 0.3 -50 % dB PO =400mW, RL = 8 Ω, SPKVDD=3.3V 1.0 -40 % dB PO =360mW, RL = 8 Ω, SPKVDD=5V 0.3 -50 % dB Total Harmonic Distortion THD PO =800mW, RL = 8 Ω, SPKVDD=5V 1 -40 % dB SPKVDD=3.3V, RL = 8 Ω 90 dB Signal to Noise Ratio SNR SPKVDD=5V, RL = 8 Ω 90 dB Power Supply Rejection Ratio 50 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 10) OUT3BOOST=1 OUT4BOOST=1 (SPKVDD/3.3)*1.5 Vrms Signal to Noise Ratio (Note 6,7) SNR A-weighted TBD 98 dB Total Harmonic Distortion (Note 8) THD RL = 10 k Ω full-scale signal -84 dB Channel Separation (Note 9) 1kHz signal 80 100 dB Microphone Bias MBVSEL=0 0.9*AVDD V Bias Voltage VMICBIAS MBVSEL=1 0.75*AVDD V Bias Current Source IMICBIAS 3 mA Output Noise Voltage Vn 1K to 20kHz 15 nV/ √Hz Video Buffer Low pass filter order 3 rd order LPF -3dB cutoff 10 MHz LPF gain flat to within 0.1dB 5.3 MHz Maximum output voltage swing Vom f=100kHz, THD=1% 1.25 Vp-p Programmable Voltage Gain Av 0 6 dB Differential gain DG Vin=1Vp-p 1 % Differential phase DP Vin=1Vp-p 1 Deg Signal to Noise Ratio VSNR +60 dB Digital Input / Output Input HIGH Level VIH 0.7 ×DBVDD V Input LOW Level VIL 0.3 ×DBVDD V Output HIGH Level VOH IOL=1mA 0.9 ×DBVDD V Output LOW Level VOL IOH-1mA 0.1xDBVDD V Input capacitance TBD pF Input leakage TBD pA |
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