wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 17

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
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
48kHz sample rate
8kHz sample rate
48kHz, Po = 0dBFS 1kHz sine wave
Stereo analogue bypass to headphones - IN1L/R or IN2L/R pins to HPOUTL+HPOUTR pins with 30Ω load.
Test conditions:
LIN_VOL = RIN_VOL = 00101 = +0.0 dB
MCLK = 11.2896MHz
Digital audio interface disabled
Note that the Analogue bypass configuration does not benefit from the Class W dynamic control.
Variant test conditions
Quiescent
HPOUTVOL = 000000 (-57dB)
Po = 0.1mW/channel 1kHz sine wave
HPOUTVOL = 100000 (-25dB)
Po = 1mW/channel 1kHz sine wave
HPOUTVOL = 101010 (-15dB)
Stereo analogue bypass to Line-out - IN1L/R or IN2L/R pins to LINEOUTL+LINEOUTR pins with 30Ω load.
Test conditions:
LIN_VOL = RIN_VOL = 00101 = +0.0 dB
MCLK = 11.2896MHz
Digital audio interface disabled
Note that the Analogue bypass configuration does not benefit from the Class W dynamic control.
Variant test conditions
Quiescent
LINEOUTVOL = 000000 (-57dB)
Quiescent
LINEOUTVOL = 101011 (-14dB)
Quiescent
LINEOUTVOL = 111001 (0dB)
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
Off (default settings)
No Clocks applied
Off (default settings)
AIFRXDAT, MCLK, BCLK, and LRCLK
applied
w
1.8
1.8
1.8
1.8
1.8
1.8
V
1.8
1.8
V
1.8
1.8
1.8
V
V
AVDD
AVDD
AVDD
AVDD
1.67
1.67
1.78
mA
1.24
1.29
1.30
1.04
1.04
1.04
0.01
0.01
mA
mA
mA
V
1
1
1
V
1
1
1
1.0
1.0
1.0
DCVDD
V
V
1
1
DCVDD
DCVDD
DCVDD
0.76
0.18
0.77
mA
0.11
0.11
0.11
0.15
0.15
0.15
mA
0.00
0.02
mA
mA
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.8
V
V
1.8
1.8
1.8
V
DBVDD
V
DBVDD
DBVDD
DBVDD
0.00
0.00
0.00
mA
0.00
0.00
0.00
mA
0.00
0.00
0.00
0.00
0.00
mA
mA
1.8
1.8
1.8
V
1.8
1.8
1.8
CPVDD
1.8
1.8
V
1.8
1.8
1.8
V
V
CPVDD
CPVDD
CPVDD
0.36
0.36
2.27
mA
PD, Rev 4.0, September 2010
0.26
2.05
5.86
mA
0.21
0.63
1.25
0.01
0.01
mA
mA
2.5
2.5
2.5
V
MICVDD
2.5
2.5
2.5
V
2.5
2.5
MICVDD
1.8
1.8
1.8
V
V
MICVDD
MICVDD
0.01
0.01
0.01
mA
0.01
0.01
0.01
mA
0.01
0.01
0.01
0.01
0.01
mA
mA
WM8918
TOTAL
TOTAL
4.43
3.86
8.09
mW
TOTAL
TOTAL
13.02
2.82
6.13
mW
2.41
3.18
4.28
mW
0.04
0.06
mW
17