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WM8985GEFL/R Datasheet(PDF) 12 Page - Wolfson Microelectronics plc |
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WM8985GEFL/R Datasheet(HTML) 12 Page - Wolfson Microelectronics plc |
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12 / 118 page  WM8985 Pre-Production w PP, Rev 3.4, October 2006 12 Test Conditions DCVDD=1.8V, AVDD1=AVDD2=DBVDD=3.3V, TA = +25 oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DAC to left and right mixer into headphone 16Ω load on LOUT2 and ROUT2, Class AB mode LOUT2VOL, ROUT2VOL, DACLVOL and DACRVOL = 0dB Full-scale output AVDD1/3.3 Vrms A-weighted AVDD1=AVDD2=3.3V 97 dB Signal to Noise Ratio 3 SNR 22Hz to 20kHz AVDD1=AVDD2=3.3V 95.5 dB Total Harmonic Distortion 4 THD Po = 20mW, RL=16Ω -79 -70 dBFS Total Harmonic Distortion + Noise 5 THD+N Po = 20mW, RL=16Ω -75 TBC dBFS Channel Separation 6 1kHz signal 100 dB DAC to left and right mixer into headphone 16Ω load on LOUT2 and ROUT2, Class D mode, Lfilter = 33nH Cfilter = 220nf LOUT2VOL, ROUT2VOL, DACLVOL and DACRVOL = 0Db Full-scale output AVDD1/3.3 Vrms Signal to Noise Ratio 3 SNR A-weighted AVDD1=AVDD2=3.3V 80 90 dB Total Harmonic Distortion 4 THD Po = 20mW, RL=16Ω -79 dBFS Channel Separation 6 1kHz signal 100 dB PWM Rise Time 1.5 ns PWM Fall Time 1.5 ns PWM Switching Frequency DCLKDIV = 1000 1.4 MHz Efficiency RL = 16Ω, tPW = 20ns, PO = 20mW 72 % Power Supply Rejection PSRR 100mVpp ripple @217Hz injected on AVDD2 70 dB Idle Current No analogue output signal on either channel 0.5 mA Bypass paths to left and right output mixers. BYPL2LMIX = 1 and BYPR2RMIX = 1 PGA gain range into mixer Gain adjusted by BYPLMIXVOL and BYPRMIXVOL -15 0 +6 dB BYPLMIXVOL and BYPRMIXVOL gain step into mixer 3 dB Mute attenuation BYPL2LMIX = 0 BYPR2RMIX = 0 100 dB Analogue outputs (LOUT1, ROUT1, LOUT2, ROUT2) Programmable Gain range Gain adjusted by L/ROUT1VOL and L/ROUT2VOL -57 0 +6 dB Programmable Gain step size Monotonic 1 dB Mute attenuation 1kHz, full scale signal L/ROUT1MUTE = 1 L/ROUT2MUTE = 1 85 dB |
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