WM8721 Datasheet, PDF (6/34 Pages) Wolfson Microelectronics plc – Internet Audio DAC with Integrated Headphone Driver

WM8721
POWER CONSUMPTION
MODE DESCRIPTION
CURRENT CONSUMPTION
Product Preview
Playback
Standby
Power Down
MIN
TYP
000
6
011
0.05
1X1
0.01
Table 1 Powerdown Mode Current Consumption Examples
MAX
UNITS
mA
mA
mA
Notes:
1. AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25^oC. Slave Mode, fs = 48kHz,
MCLK = 256fs (12.288MHz).
2. All figures are quiescent, with no signal.
3. The power dissipation in the headphone itself not included in the above table.
MASTER CLOCK TIMING
MCLK
t_XTIL
t_XTIH
t_XTIY
Figure 1 System Clock Timing Requirements
Test Conditions
AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25^oC, Slave Mode fs = 48kHz, MCLK =
256fs unless otherwise stated.
PARAMETER
SYMBOL
System Clock Timing Information
MCLK System clock pulse width high
TXTIH
MCLK System clock pulse width low
MCLK System clock cycle time
TXTIL
TXTIY
MCLK Duty cycle
TEST CONDITIONS
MIN
18
18
54
40:60
TYP
MAX
UNIT
ns
ns
ns
60:40
WOLFSON MICROELECTRONICS LTD
PP Rev 1.3 November 2000
6