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WM8976CGEFL/V 데이터시트(PDF) 11 Page - Wolfson Microelectronics plc

부품명 WM8976CGEFL/V
상세설명  Stereo CODEC with Speaker Driver
PDF  114 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8976CGEFL/V 데이터시트(HTML) 11 Page - Wolfson Microelectronics plc

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Production Data
WM8976
w
PD, Rev 4.5, November 2011
11
POWER CONSUMPTION
Typical current consumption for various scenarios is shown below.
MODE
AVDD
(3.0V)
(mA)
DCVDD
(1.8V)
(mA)
DBVDD
1
(3.0V)
(mA)
TOTAL
POWER
(mW)
Off
0.04
3
0.0008
<0.0001
0.12
Sleep (VREF maintained, no clocks)
0.04
0.0008
<0.0001
0.12
MIC Record (8kHz)
2
4.1
1.0
0.001
14.1
Stereo 16Ω HP Playback (48kHz, quiescent)
2
3.3
6.2
0.004
21.1
Stereo 16Ω HP Playback (48kHz, white noise)
2
5.4
7.3
0.004
29.4
Stereo 16Ω HP Playback (48kHz, sine wave)
2
18
6.7
0.004
66.1
Notes:
1.
DBVDD Current will increase with greater loading on digital I/O pins.
2.
5 Band EQ is enabled.
3.
AVDD standby current will fall to nearer 15uA when thermal shutdown sensor is disabled.
Table 1 Power Consumption
ESTIMATING SUPPLY CURRENT
When either the DAC or ADC is enabled approximately 7mA will be drawn from DCVDD when
DCVDD=1.8V and fs=48kHz. When the PLL is enabled approximately 1.5mA additional current will
be drawn from DCVDD.
As a general rule, digital supply currents will scale in proportion to sample rates. Supply current for
analogue and digital blocks will also be lower at lower supply voltages.
Power consumed by the output drivers will depend greatly on the signal characteristics. A quiet
signal, or a signal with long periods of silence will consume less power than a signal which is
continuously loud.
Estimated supply current for the analogue blocks is shown in Table 2. Note that power dissipated in
the load is not shown.



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