WM8731 / WM8731L
Production Data
POWER CONSUMPTION – WM8731
MODE
CURRENT CONSUMPTION
DESCRIPTION
TYPICAL
AVDD
(3.3V)
HP
DC
DB
UNIT
VDD
(3.3V)
VDD
(1.5V)
VDD
(3.3V)
Record and Playback
Oscillator enabled
External MCLK
0
0
0
0
0
1
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
13.1
13.1
12.2
1.7
1.7
1.7
3.0
3.2
3.2
1.5
0.8
mA
mA
mA
Oscillator and
0.07
CLKOUT disabled,
No microphone
Playback Only
Oscillator enabled
External MCLK
Record Only
0
0
0
1
0
1
0
0
0
0
1
1
1
1
1
1
3.4
3.3
1.7
1.7
2.1
2.3
1.5
mA
mA
0.07
Line Record,
oscillator enabled
0
0
0
0
0
0
0
0
0
1
0
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
0
0
0
0
1
1
9.2
9.2
8.6
8.6
-
-
-
-
2.6
2.6
2.7
2.6
1.3
0.7
1.5
0.7
mA
mA
mA
mA
Line Record, using
external MCLK
Mic Record,
oscillator enabled
Mic Record, using
external MCLK
Side Tone (Microphone Input to Headphone Output)
External clock still
running
0
0
1
0
1
1
1
0
0
1
1
1.6
1.5
1.7
1.7
0.08
-
0.7
-
mA
mA
Clock stopped
0
0
1
0
1
Analogue Bypass (Line-in to Line-out)
External clock still
running
0
0
1
0
0
1
1
1
1
1
1
0
0
2.1
2.2
1.7
1.7
0.08
-
0.7
-
mA
mA
Clock stopped
0
0
1
Standby
External clock still
running
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
16
16
0.3
0.3
77
65
μA
μA
Clock stopped
0.3
0.2
Power Down
External clock still
running
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0.2
0.3
0.3
0.3
77
65
μA
μA
Clock stopped
0.3
0.3
Table 1 Powerdown Mode Current Consumption Examples
Notes:
1. TA = +25oC. fs = 48kHz, XTI/MCLK = 256fs (12.288MHz).
2. The data presented here was measured with the audio interface in master mode whenever the internal clock oscillator
was used, and in slave mode whenever an external clock was used (i.e. MS = 1 when OSCPD = 0 and vice versa).
However, it is also possible to use the WM8731 with MS = OSCPD = 0 or MS = OSCPD = 1.
3. All figures are quiescent, with no signal.
4. The power dissipation in the headphone itself not included in the above table.
PD, Rev 4.8, April 2009
w
10
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
