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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8993 датащи(PDF) 24 Page - Wolfson Microelectronics plc |
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WM8993 датащи(HTML) 24 Page - Wolfson Microelectronics plc |
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24 / 229 page  WM8993 Production Data w PD, November 2010, Rev 4.0 24 Test Conditions DCVDD = 1.2V, AVDD2 = DBVDD = CPVDD = 1.8V, AVDD1 = 3.0V, SPKVDD = 5V, DGND=AGND=CPGND=SPKGND=0V, TA = +25 oC, 1kHz sinusoidal signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Analogue Reference Levels H1 VMID Midrail Reference Voltage -3% AVDD1/2 +3% V Microphone Bias (MICBIAS1 and MICBIAS2) H2 Bias Voltage 2.4mA load current MICB1_LVL=0 -5% 0.9 ×AVDD1 +5% V 2.4mA load current MICB1_LVL=1 -5% 0.65 ×AVDD1 +5% V H3 Bias Current Source 2.4 mA H4 Output Noise Spectral Density 1kHz to 20kHz 100 nV/ √Hz H6 MIC Current Detect Thresholds JD_THR = 00 150 μA JD_THR = 01 300 μA JD_THR = 10 600 μA JD_THR = 11 1200 μA MIC Short Circuit Detect Thresholds JD_SCTHR = 00 300 μA JD_SCTHR = 01 600 μA JD_SCTHR = 10 1200 μA JD_SCTHR = 11 2400 μA Current detect and short circuit detect thresholds are subject to a +/30% across temperature, supply and part-to-part variation. This should be factored into any application design. Charge Pump H7 Start-up Time 500 μs H8 Supply Voltage 1.71 2.0 V H9 CPVOUTP Normal mode CPVDD V Low power mode CPVDD/2 V H10 CPVOUTN Normal mode -CPVDD V Low power mode -CPVDD/2 V H13 Flyback Capacitor (between CPFB1 and CPFB2) at 2V 1 2.2 μF H14 CPVOUTP Capacitor at 2V 2 2.2 μF H15 CPVOUTN Capacitor at 2V 2 2.2 μF Digital Input / Output H16 Input HIGH Level 0.8 ×DBVDD V H17 Input LOW Level 0.2 ×DBVDD V Note that digital input pins should not be left unconnected / floating. H18 Output HIGH Level IOL=1mA 0.8 ×DBVDD V H19 Output LOW Level IOH=-1mA 0.2 ×DBVDD V H20 Input capacitance 10 pF H21 Input leakage -0.9 0.9 uA |
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