wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 11

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

Production Data
INPUT SIGNAL PATH
OUTPUT SIGNAL PATH
w
PGA and Microphone Boost
Minimum PGA gain setting
Maximum PGA gain setting
Single-ended to differential
conversion gain
PGA gain accuracy
Mute attenuation
Equivalent input noise
Stereo Playback to Headphones - DAC input to HPOUTL+HPOUTR pins with 15Ω load
Test conditions: HPOUTL_VOL = HPOUTR_VOL = 111001b (0dB)
Output Power (per Channel)
DC Offset
Signal to Noise Ratio
Total Harmonic Distortion + Noise
Channel Separation
Channel Level Matching
Power Supply Rejection Ratio
PARAMETER
PARAMETER
L_MODE/R_MODE= 00b or 01b
L_MODE/R_MODE= 00b or 01b
L_MODE/R_MODE= 00b or 01b
L_MODE/R_MODE= 10b
L_MODE/R_MODE= 10b
L_MODE/R_MODE= 00b
L_MODE/R_MODE= 00b
L_MODE/R_MODE= 00b
L_MODE/R_MODE= 1X
L_MODE/R_MODE= 1X
all modes of operation
Gain +7.5 to +28.3dB
TEST CONDITIONS
Gain -1.5 to +6.7dB
Gain +12 to +24dB
Gain +27 to +30dB
SYMBOL
THD+N
PSRR
SNR
P
o
10kHz signal, 0dBFS
calibration complete.
TEST CONDITIONS
217Hz, 100mVpk-pk
R
R
1kHz signal, 0dBFS
1kHz signal, 0dBFS
1kHz, 100mV pk-pk
DC servo enabled,
R
R
L
L
L
L
=30Ω; P
=15Ω; P
=30Ω; P
=15Ω; P
R
R
A-weighted
1% THD
1% THD
Load
Load
= 30Ω
= 15Ω
o
o
o
o
=20mW
=20mW
=2mW
=2mW
MIN
-1.5
-1.5
-1
-1
+28.28
MIN
-1.5
-1.55
90
TYP
+12
+30
100
214
+6
30
PD, Rev 4.0, September 2010
-0.76
-3.19
0.92
0.69
TYP
100
+/-1
-91
-84
-87
-85
28
32
96
90
75
70
MAX
+1.5
+1.5
+1
+1
MAX
+1.5
-80
WM8918
nV/√Hz
μVrms
UNIT
dB
dB
dB
dB
dB
UNIT
Vrms
Vrms
dBV
dBV
mW
mW
mV
dB
dB
dB
dB
dB
11