wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 27

• Manufacturer Part Number: wm8351
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

Production Data
9
9.1
w
TYPICAL PERFORMANCE DATA
AUDIO CODEC
Typical THD+N performance of the Headphone Drivers is shown below for 16Ω and 32Ω headphone
loads. These graphs are derived whilst using the WM8351 Power Management to generate the
power supply rails for the audio CODEC. The supply conditions are as follows:
THD+N Amplitude (dBV)
THD+N Amplitude (dBV)
-100
-100


-10
-20
-30
-40
-50
-60
-70
-80
-90
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
0
0
0
AVDD = HPVDD = 3.0V, generated by WM8351 LDO1
DCVDD = DBVDD = 1.8V, generated by WM8351 DC-DC1
5
5
AC coupled headphone
AC coupled Headphone
10
10
(32 Ohm Load)
(16 Ohm Load)
Output Power (mW)
Output Power (mW)
15
15
20
20
25
AVDD=HPVDD=3.0V
(WM8351 - LDO1)
DCVDD=DBVDD=1.8V
(WM8351 - DCDC1)
AVDD=HPVDD=3.0V
(WM8351 - LDO1)
DCVDD=DBVDD=1.8V
(WM8351 - DCDC1)
25
30
30
35
PD, June 2009, Rev 4.1
WM8351
27