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WM8912 Scheda tecnica(PDF) 13 Page - Wolfson Microelectronics plc

Il numero della parte WM8912
Spiegazioni elettronici  Ultra Low Power DAC with Headphone Driver for Portable Audio Applications
PDF  128 Pages
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Produttore elettronici  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8912 Scheda tecnica(HTML) 13 Page - Wolfson Microelectronics plc

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Production Data
WM8912
w
PD, Rev 4.0, September 2010
13
POWER CONSUMPTION MEASUREMENTS
Stereo Playback to Headphones - DAC input to HPOUTL+HPOUTR pins with 30Ω load.
Test conditions:
VMID_RES = 01 (for normal operation)
CP_DYN_PWR = 1 (Class-W, Charge pump controlled by real-time audio level)
Variant test conditions
AVDD
DCVDD
DBVDD
CPVDD
TOTAL
V
mA
V
mA
V
mA
V
mA
mW
48kHz sample rate
1.80
1.69
1.00
0.76
1.80
0.00
1.80
0.31
4.38
8kHz sample rate
1.80
1.69
1.00
0.18
1.80
0.00
1.80
0.31
3.80
48kHz, Po = 0.1mW/channel
1kHz sine wave 0dBFS
HPOUT_VOL= -25dB
DAC_VOL= 0dB
1.80
1.71
1.00
0.77
1.80
0.00
1.80
1.99
7.45
48kHz, Po = 1mW/channel
1kHz sine wave 0dBFS
HPOUT_VOL= -15dB
DAC_VOL= 0dB
1.80
1.73
1.00
0.77
1.80
0.00
1.80
5.61
13.99
48kHz sample rate, Master mode,
FLL enabled, MCLK input frequency =
13MHz
1.80
1.82
1.00
1.05
1.80
0.73
1.80
0.30
6.18
48kHz sample rate, Master mode,
FLL enabled, MCLK input frequency =
32.768kHz
1.80
1.83
1.00
0.94
1.80
0.76
1.80
0.29
6.14
Stereo Playback to Line-out - DAC input to LINEOUTL+LINEOUTR or HPOUTL+HPOUTR pins with 10kΩ / 50pF load
Test conditions :
VMID_RES = 01 (for normal operation)
CP_DYN_PWR = 1 (Class-W, Charge pump controlled by real-time audio level)
Variant test conditions
AVDD
DCVDD
DBVDD
CPVDD
TOTAL
V
mA
V
mA
V
mA
V
mA
mW
48kHz sample rate
1.8
1.67
1
0.76
1.8
0.00
1.8
0.36
4.43
8kHz sample rate
1.8
1.67
1
0.18
1.8
0.00
1.8
0.36
3.86
48kHz, Po = 0dBFS 1kHz sine wave
1.8
1.78
1
0.77
1.8
0.00
1.8
2.27
8.09
Off
Note: DC servo calibration is retained in this state as long as DCVDD is supplied. This allows fast, pop suppressed start-up from
the off state.
Variant test conditions
AVDD
DCVDD
DBVDD
CPVDD
TOTAL
V
mA
V
mA
V
mA
V
mA
mW
Off (default settings)
No Clocks applied
1.8
0.01
1
0.00
1.8
0.00
1.8
0.01
0.04
Off (default settings)
DACDAT, MCLK, BCLK, and LRCLK
applied
1.8
0.01
1
0.02
1.8
0.00
1.8
0.01
0.06



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