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WM9711 Datasheet(PDF) 11 Page - Wolfson Microelectronics plc |
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WM9711 Datasheet(HTML) 11 Page - Wolfson Microelectronics plc |
11 / 66 page ![]() Production Data WM9711L w PD Rev 4.1 April 2004 11 POWER CONSUMPTION The power consumption of the WM9711L depends on the following factors. • Supply voltages: Reducing the supply voltages also reduces digital supply currents, and therefore results in significant power savings especially in the digital sections of the WM9711L. • Operating mode: Significant power savings can be achieved by always disabling parts of the WM9711L that are not used (e.g. audio ADC, DAC, AUXDAC, speaker driver, etc.) Mode Description 26h 14:8 24h 15:0 Other Settings Total Power V I (mA) V I (mA) V I (mA) (mW) OFF (lowest possible power) 1111111 0111111111111111 58h, SVD = 1 3.3 0.0005 3.3 0 3.3 0 0.00165 Clocks stopped 2.5 0.0004 2.5 0 2.5 0 0.001 1.8 0.0003 1.8 0 1.8 0 0.00054 LPS (Low Power Standby) 1111111 0111111111111111 3.3 0.005 3.3 0 3.3 0 0.0165 VREF maintained using 1MOhm string 2.5 0.004 2.5 0 2.5 0 0.01 1.8 0.003 1.8 0 1.8 0 0.0054 Standby Mode (ready to playback) 1110111 0111111111111111 3.3 0.56 3.3 0 3.3 0 1.848 VREF maintained using 50kOhm string 2.5 0.37 2.5 0 2.5 0 0.925 1.8 0.241 1.8 0 1.8 0 0.4338 "Idle" Mode 1100111 0111111111111111 3.3 1.1 3.3 0 3.3 0 3.63 VREF maintained using 50kOhm string 2.5 0.76 2.5 0 2.5 0 1.9 use LPS mode instead, if possible 1.8 0.508 1.8 0 1.8 0 0.9144 Phone Call - using headphone / ear speaker 0110011 0111100010101100 0Eh, bit 7 = 1 3.3 2.36 3.3 0 3.3 0 7.788 HPOUTL, HPOUTR and OUT3 active (mic gain boost) 2.5 1.838 2.5 0 2.5 0 4.595 AC-Link stopped 1.8 1.218 1.8 0 1.8 0 2.1924 Phone Call - using loudspeaker 1110011 0111101100110100 0Eh, bit 7 = 1 3.3 2.385 3.3 0 3.3 0 7.8705 AC-Link stopped (mic gain boost) 2.5 1.837 2.5 0 2.5 0 4.5925 1.8 1.218 1.8 0 1.8 0 2.1924 Record from mono microphone 1000110 0110101111111111 0Eh, bit 7 = 1 3.3 3.27 3.3 11.21 3.3 2.6 56.364 with MICBIAS (mic gain boost) 2.5 2.66 2.5 7.78 2.5 2.13 31.425 all analogue outputs disabled 1.8 1.838 1.8 5.21 1.8 1.41 15.2244 Record phone call 0000000 0000000010001000 0Eh, bit 7 = 1 3.3 9.461 3.3 12.22 3.3 2.62 80.1933 both sides mixed to mono (mic gain boost) 2.5 7.46 2.5 8.552 2.5 2.1 45.28 call using headphone / ear speaker 1.8 5.318 1.8 5.799 1.8 1.48 22.6746 DAC Playback - using loudspeaker 1000001 0001111101110111 3.3 3.45 3.3 9.884 3.3 2.6 52.5822 2.5 2.549 2.5 6.755 2.5 2.1 28.51 1.8 1.738 1.8 4.606 1.8 1.41 13.9572 DAC Playback - using headphone 0000001 0001110011101111 3.3 3.62 3.3 9.8 3.3 2.6 52.866 2.5 2.71 2.5 6.78 2.5 2.1 28.975 1.8 1.748 1.8 4.606 1.8 1.47 14.0832 DAC Playback - to Line-out 0000001 0001110011110111 3.3 3.62 3.3 9.8 3.3 2.6 52.866 2.5 2.71 2.5 6.78 2.5 2.1 28.975 1.8 1.748 1.8 4.606 1.8 1.41 13.9752 Maximum Power (everything on) 0000000 0000000000000000 0Eh, bit 7 = 1 3.3 9.593 3.3 12.26 3.3 2.62 80.7609 (mic gain boost) 2.5 7.37 2.5 8.563 2.5 2.12 45.1325 1.8 5.388 1.8 5.8 1.8 1.48 22.8024 AVDD DCVDD DBVDD Table 1 Supply Current Consumption (Simulation) Notes: 1. All figures are at TA = +25 oC, audio sample rate fs = 48kHz, with zero signal (quiescent). 2. The power dissipated in the headphone and speaker is not included in the above table. |
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