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WM8955LEFL Datasheet(PDF) 10 Page - Wolfson Microelectronics plc

Part # WM8955LEFL
Description  STEREO DAC FOR PORTABLE AUDIO APPLICATIONS
PDF  43 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8955LEFL Datasheet(HTML) 10 Page - Wolfson Microelectronics plc

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WM8955L
Product Preview
w
Product Preview Rev 0.4 May2003
10
POWER CONSUMPTION
The power consumption of the WM8955L depends on the following factors.
•
Supplyvoltages: Reducing the supplyvoltages also reduces supplycurrents, and therefore results in significant power
savings.
•
Operating mode: Power consumption is lower in mono modes than in stereo, as one DAC is switched OFF. Unused
analogue outputs should be switched off.
Control Register
R24 R23 R38
Other settings
Tot. Power
Bit
V
I (mA)
V
I (mA)
V
I (mA)
V
I (mA)
(mW)
OFF
00 0 0 0 0 0 0 0 0 0
0
11
0
0 0
Clocks stopped
3.3
3.3
3.3
3.3
01
0
0 0
2.5
2.5
2.5
2.5
00
0
0 0
1.8
1.5
1.5
1.8
Low-power standby(LPS)
10 1 0 0 0 0 0 0 0 0
0
11
0
0 0
3.3
3.3
3.3
3.3
using 500 KOhm VMID string
01
0
0 0
2.5
2.5
2.5
2.5
00
0
0 0
1.8
1.5
1.5
1.8
Playback to Line-out
01 1 1 1 0 0 1 1 0 0
0
11
0
0 0
3.3
3.3
3.3
3.3
01
0
0 0
2.5
2.5
2.5
2.5
00
0
0 0
1.8
1.5
1.5
1.8
Playback to Line-out
01 1 1 1 1 1 0 0 0 0
1
11
0
0 0
3.3
3.3
3.3
3.3
(64x oversampling mode)
01
0
0 0
2.5
2.5
2.5
2.5
00
0
0 0
1.8
1.5
1.5
1.8
Playback
01 1 1 1 1 1 0 0 0 0
0
11
0
0 0
3.3
3.3
3.3
3.3
to 16 Ohm headphone
01
0
0 0
2.5
2.5
2.5
2.5
using caps on HPOUTL/R
00
0
0 0
1.8
1.5
1.5
1.8
Playback
01 1 1 1 1 1 0 0 0 1
0
11
0
0 0
R24, OUT3SW=00
3.3
3.3
3.3
3.3
to 16 Ohm headphone
01
0
0 0
2.5
2.5
2.5
2.5
capless mode using OUT3
00
0
0 0
1.8
1.5
1.5
1.8
Playback
01 1 1 1 0 0 1 1 0 0
0
11
0
0 0
R24, ROUT2INV=1
3.3
3.3
3.3
3.3
to 8 Ohm BTL speaker
01
0
0 0
2.5
2.5
2.5
2.5
00
0
0 0
1.8
1.5
1.5
1.8
Headphone Amp
01 1 0 0 1 1 0 0 0 0
0
11
0
0 0
3.3
3.3
3.3
3.3
line-in to 16 Ohm h/phone
01
0
0 0
2.5
2.5
2.5
2.5
00
0
0 0
1.8
1.5
1.5
1.8
Speaker Amp
01 1 0 0 0 0 1 1 0 0
0
11
0
0 0
R24, ROUT2INV=1
3.3
3.3
3.3
3.3
line-in to 8 Ohm speaker
01
0
0 0
2.5
2.5
2.5
2.5
00
0
0 0
1.8
1.5
1.5
1.8
Phone Call
01 1 00 110 01 1
0
11
1
0 0
3.3
3.3
3.3
3.3
diff. mono line-in to h/phone,
01
1
0 0
2.5
2.5
2.5
2.5
diff. mono line-out to TX
00
1
0 0
1.8
1.5
1.5
1.8
PLL only00 0 0 0 0 0 0 0 0 0
0
11
0
1 0
3.3
3.3
3.3
3.3
01
0
1 0
2.5
2.5
2.5
2.5
00
0
1 0
1.8
1.5
1.5
1.8
PLL and CLKOUT
00 0 0 0 0 0 0 0 0 0
0
11
0
1 1
3.3
3.3
3.3
3.3
01
0
1 1
2.5
2.5
2.5
2.5
00
0
1 1
1.8
1.5
1.5
1.8
Maximum Power
01 1 1 1 1 1 1 1 1 1
0
11
1
1 1
R24, ROUT2INV=1
3.3
3.3
3.3
3.3
everything ON
01
1
1 1
2.5
2.5
2.5
2.5
00
1
1 1
1.8
1.5
1.5
1.8
DBVDD
HPVDD
R43
R25
R26 (1Ah)
AVDD
DCVDD
Table 1 Supply Current Consumption (data to follow)
Notes:
1.
TA =+25
oC, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs), 24-bit data
2.
All figures are quiescent, with no signal.
3.
The power dissipated in the headphone itself is not included in the above table.



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