wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 10

• Manufacturer Part Number: wm8903
• Description: Ultra Low Power Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8903
OUTPUT SIGNAL PATH
w
PGA and microphone boost
PARAMETER
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)
PARAMETER
Output Power (per Channel)
DC Offset
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion + Noise
Channel Separation
Channel Level Matching
Power Supply Rejection Ratio
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
THD
P
o
10kHz signal, 0dBFS
20kHz, 100mV pk-pk
calibration complete.
TEST CONDITIONS
1kHz signal, 0dBFS
1kHz signal, 0dBFS
1kHz, 100mV pk-pk
R
R
R
R
DC servo enabled,
R
R
R
R
L
L
L
L
L
L
L
L
=30Ω; P
=15Ω; P
=30Ω; P
=15Ω; P
=30Ω; P
=15Ω; P
=30Ω; P
=15Ω; P
A-weighted
R
R
1% THD
1% THD
Load
Load
= 30Ω
= 15Ω
o
o
o
o
o
o
o
o
=20mW
=20mW
=20mW
=20mW
=2mW
=2mW
=2mW
=2mW
MIN
-1.5
-1.5
-1
-1
+28.28
MIN
-1.55
90
TYP
+12
+30
114
828
0
+6
88
-0.76
-3.47
0.91
0.67
TYP
+/-1
100
-93
-82
-83
-83
-90
-82
-81
-81
28
30
96
85
60
40
PP, Rev 3.1, August 2009
MAX
+1.5
+1.5
+1
+1
+/-1.5
MAX
-72
-70
Pre-Production
nV/√Hz
μVrms
UNIT
dB
dB
dB
dB
dB
Vrms
Vrms
UNIT
mW
dBV
mW
dBV
mV
dB
dB
dB
dB
dB
dB
10