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WM8962B Datasheet(PDF) 20 Page - Wolfson Microelectronics plc |
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WM8962B Datasheet(HTML) 20 Page - Wolfson Microelectronics plc |
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20 / 295 page  WM8962 20 Rev 4.3 Test Conditions MICVDD = DCVDD = DBVDD = CPVDD = AVDD = PLLVDD = 1.8V, SPKVDD1 = SPKVDD2 = 5V. TA = +25 oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Current Consumption AVDD IAVDD OFF: power applied, all clocks stopped, thermal shut-down enabled 40 75 µA DCVDD IDCVDD 3 25 µA DBVDD IDBVDD 0 10 µA CPVDD ICPVDD 0.5 10 µA SPKVDD1 ISPKVDD1 1 5 µA SPKVDD2 ISPKVDD2 1 5 µA MICVDD IMICVDD 0.2 5 µA PLLVDD IPLLVDD1 7 30 µA MICVDD IMICVDD SPKVDD1=SPKVDD2=5V, MICVDD=2.5V, All other supplies disconnected 0.2 5 µA SPKVDD1 ISPKVDD1 0.2 5 µA SPKVDD2 ISPKVDD2 0.2 5 µA MICVDD IMICVDD SPKVDD1=SPKVDD2=5V, MICVDD=2.5V, All other supplies 0V 0.2 5 µA SPKVDD1 ISPKVDD1 0.2 5 µA SPKVDD2 ISPKVDD2 0.2 5 µA Note: 1. If AVDD 1.8, current threshold values should be multiplied by (AVDD/1.8) 2. Four different bias configurations are supported for ADC input paths; these are defined in the “Reference Voltages and Bias Control ” section. 3. Two different bias c onfigurations are supported for the DAC / Headphone output paths; these are defined in the “Reference Voltages and Bias Control ” section. 4. N = number of clock periods in one sample. TERMINOLOGY 1. Signal-to-Noise Ratio (dB) – SNR is a measure of the difference in level between the maximum full scale output signal and the output with no input signal applied. 2. Total Harmonic Distortion (dB) – THD is the level of the rms value of the sum of harmonic distortion products relative to the amplitude of the measured output signal. 3. Total Harmonic Distortion plus Noise (dB) – THD+N is the level of the rms value of the sum of harmonic distortion products plus noise in the specified bandwidth relative to the amplitude of the measured output signal. 4. Channel Separation (L/R) (dB) – left-to-right and right-to-left channel separation is the measured signal level in the idle channel at the test signal frequency relative to the signal level at the output of the active channel. The active channel is configured and supplied with an appropriate input signal to drive a full scale output, with signal measured at the output of the associated idle channel. 5. Mute Attenuation – This is a measure of the difference in level between the full scale output signal and the output with mute applied. 6. All performance measurements carried out with 20kHz low pass filter, and where noted an A-weighted filter. Failure to use such a filter will result in higher THD and lower SNR readings than are found in the Electrical Characteristics. The low pass filter removes out of band noise; although it is not audible it may affect dynamic specification values. |
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