WM8980CGEFL/RV WOLFSON [Wolfson Microelectronics plc], WM8980CGEFL/RV Datasheet - Page 12

• Manufacturer Part Number: WM8980CGEFL/RV
• Description: Stereo CODEC with Speaker Driver and Video Buffer
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8980
POWER CONSUMPTION
Table 1 Power Consumption
Notes:
1.
2.
3.
ESTIMATING SUPPLY CURRENT
w
Off
Sleep (VREF maintained, no clocks)
MIC Record (8kHz)
Stereo 16Ω HP Playback (48kHz, quiescent)
Stereo 16Ω HP Playback (48kHz, white noise)
Stereo 16Ω HP Playback (48kHz, sine wave)
Stereo 16Ω HP Playback (48kHz, sine wave)
enabled
DBVDD Current will increase with greater loading on digital I/O pins.
5 Band EQ is enabled.
AVDD standby current will fall to nearer 15uA when thermal shutdown sensor is disabled.
2
Typical current consumption for various scenarios is shown below.
MODE
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.
The video buffer will draw approximately 4mA with no load attached. During normal operation up to
30mA will be drawn.
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.
2
2
2
2
video buffer
0.04
0.04
4.1
3.3
5.4
18
18
AVDD
(3.0V)
(mA)
3
0.0008
0.0008
1.0
6.2
7.3
6.7
6.7
DCVDD
(1.9V)
(mA)
<0.0001
<0.0001
0.001
0.004
0.004
0.004
0.004
DBVDD
(3.0V)
(mA)
1
0
0
0
0
0
0
4.0
PP, Rev 3.8, May 2012
VBVDD
(3.0V)
(mA)
Pre-Production
0.12
0.12
14.1
21.1
29.4
66.1
78.1
POWER
TOTAL
(mW)
12