wm8988 Wolfson Microelectronics plc, wm8988 Datasheet - Page 7

• Manufacturer Part Number: wm8988
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
w
Test Conditions
DCVDD = 1.5V, DBVDD = 2.4V, AVDD = HPVDD =2.4V , T
data unless otherwise stated.
PARAMETER
DAC to Line-Out (L/ROUT1 or L/ROUT2 with 10kΩ / 50pF load)
Signal to Noise Ratio
(A-weighted)
Total Harmonic Distortion
Total Harmonic Distortion +
Noise
Channel Separation
Ground noise rejection
Headphone Output (LOUT1/ROUT1, LOUT2/ROUT2 AC coupled to load)
Output Power per channel
Total Harmonic Distortion
SYMBOL
THD+N
SNR
THD
THD
P
O
AVDD = 2.4V
AVDD = 2.4V
AVDD = 2.4V
AVDD=3.3V
HPCOM=LC
HPCOM=LC
AVDD=1.8V
HPCOM=LC
AVDD=3.3V
HPCOM=LC
HPCOM=LC
AVDD=1.8V
HPCOM=LC
AVDD=3.3V
HPCOM=LC
HPCOM=LC
AVDD=1.8V
HPCOM=LC
LCOM/HPCOM, LCOM/HPCOM
TEST CONDITIONS
OM=0
OM=1
OM=0
OM=0
OM=1
OM=0
OM=0
OM=1
OM=0
HPVDD=2.4V, R
HPVDD=2.4V, R
HPVDD=1.8V, R
HPVDD=1.8V, R
10mV, 20kHz noise on
HPCOM=LCOM=0
HPCOM=LCOM=0
HPCOM=LCOM=1
HPCOM=LCOM=1
DACMIXBIAS=1
DACMIXBIAS=1
DACMIXBIAS=1
DACMIXBIAS=1
10kHz signal
1kHz signal
Output power is very closely correlated with THD; see below.
P
P
P
P
enabled
O
O
O
O
A
DACMIXBIAS=0
DACMIXBIAS=1
DACMIXBIAS=0
DACMIXBIAS=1
DACMIXBIAS=0
DACMIXBIAS=1
DACMIXBIAS=0
DACMIXBIAS=1
DACMIXBIAS=0
DACMIXBIAS=1
DACMIXBIAS=0
DACMIXBIAS=1
=5mW
=5mW
=5mW
=5mW
DACMIXBIAS=0
DACMIXBIAS=1
DACMIXBIAS=0
DACMIXBIAS=1
DACMIXBIAS=0
DACMIXBIAS=1
= +25
L
L
o
L
L
=32Ω,
=16Ω,
C, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio
=32Ω
=16Ω
MIN
88
88
85
0.013
0.010
0.010
0.013
TYP
100
100
-90
-89
-83
-82
-80
-79
-88
-87
-75
-74
-75
-74
-78
-80
-80
-78
99
97
96
96
95
85
40
PD, Rev 4.0, October 2008
0.032
MAX
-75
-75
-65
-70
-70
-65
-70
WM8988
UNIT
dB
dB
dB
dB
dB
dB
dB
%
7