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WM9710 Datasheet(PDF) 8 Page - Wolfson Microelectronics plc |
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WM9710 Datasheet(HTML) 8 Page - Wolfson Microelectronics plc |
8 / 32 page WM9710 Production Data w PD Rev 4.0 December 2003 8 Test Characteristics: AVDD = 3.3V, DVDD = 3.3V, 48kHz audio sampling, TA = 25 oC, unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Mixer Inputs to Line-out (10k Ω Ω Ω Ω load) Maximum input voltage AGND 0.7 AVDD Vrms Maximum output voltage on LINEOUT 0.7 Vrms CD inputs 90 92 Signal to Noise Ratio A-weighted (Note 2) SNR Other inputs 82 93 dB CD and LINE inputs -87 0.0044 -77 0.014 PHONE input -82 0.008 -71 0.028 MIC1 input -82 0.008 -71 0.028 MIC2 input -90 0.003 -71 0.028 Total Harmonic Distortion + Noise -1dBfs input THD+N PCBEEP input -78 0.013 -67 0.045 dB % Input impedance (CD inputs) At any gain 15 k Ω At max gain 10 20 k Ω Input impedance (other mixer inputs) At 0db gain 50 100 k Ω At max gain 10 20 k Ω Input impedance MIC inputs At 0db gain 55 100 k Ω Power Supply Rejection Ratio PSRR 20 to 20kHz, without supply decoupling -40 dB Headphone Buffer (pins HPOUTL, HPOUR and MONOOUT) Maximum output voltage 0.7 Vrms RL = 32 Ω 30 mW Max Output Power (Note 1) PO RL = 16 Ω 40 mW SNR (Note 2) A-weighted 85 92 dB 1kHz, RL = 32 Ω @ PO = 10mW rms -80 0.01 dB % 1kHz, RL = 32 Ω@ PO = 20mW rms -77 0.014 dB % 1kHz, RL = 16 Ω @ PO = 10mW rms -76dB 0.016 dB % Total Harmonic Distortion + Noise THD+N 1kHz, RL = 16 Ω@ PO = 20mW rms -75dB 0.018 dB % Power Supply Rejection Ratio PSRR 20 to 20kHz, without supply decoupling -40 dB Clocks Crystal clock 24.576 MHz BITCLK frequency 12.288 MHz SYNC frequency 48.0 KHz Note: 1. Harmonic distortion on the headphone output decreases with output power – see Figure 3. 2. SNR is the ratio of 0dB signal amplitude to noise floor with no signal present (all 0s input code to DACs). 3. ADC sampling capacitance allows the user to calculate the minimum external capacitance required for a stable ADC value. |
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