wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 29

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

w
Pre-Production
TYPICAL PERFORMANCE DATA
SPEAKER DRIVER PERFORMANCE
HEADPHONE DRIVER PERFORMANCE
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
-80
-85
-100
-20
-25
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
-80
-85
-90
-95
0
0
Typical THD+N performance of the Speaker Driver is shown below for Class D mode and for Class AB mode. Data is
provided for five typical SPKVDD voltages.
Load R
Note that it is not recommended to operate Class D mode above 1W or Class AB mode above 0.5W due to high thermal
dissipation.
Typical THD+N performance of the Headphone Drivers is shown below for single-ended configuration (LOUT and ROUT)
and for BTL configuration (LOUT/OUT3 and ROUT/OUT4). Data is provided for four typical HPVDD voltages, together
with the appropriate VSEL value.
Load R
200
5
400
THD+N v Output Pow er (Single-Ended, 32Ohm)
L
L
10
= 8Ω, Frequency = 1kHz
= 32Ω, Frequency = 1kHz
THD+N v Output Power (Class D Mode)
600
15
Output Power (mW)
Output Pow er (m W)
800
20
1000
25
1200
30
1400
35
HPVDD=3.6V VSEL=11
HPVDD=3.3V VSEL=11
HPVDD=3.0V VSEL=11
HPVDD=2.7V VSEL=01
1600
SPKVDD=5.0V
SPKVDD=4.2V
SPKVDD=3.9V
SPKVDD=3.6V
SPKVDD=3.3V
40
-20
-25
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
-80
-85
-90
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
-80
-85
-90
0
0
200
20
400
THD+N v Output Pow er (BTL, 32Ohm)
THD+N v Output Power (Class AB Mode)
40
600
Output Pow er (m W)
Output Power (mW)
800
60
1000
80
1200
PP, April 2009, Rev 3.0
100
1400
HPV DD=3.6V VSEL=11
HPV DD=3.3V VSEL=11
HPV DD=3.0V VSEL=11
HPV DD=2.7V VSEL=01
1600
120
SPKVDD=5.0V
SPKVDD=4.2V
SPKVDD=3.9V
SPKVDD=3.6V
SPKVDD=3.3V
WM8400
29