Production Data
WM8352
9
TYPICAL PERFORMANCE DATA
9.1 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 WM8352 Power Management to generate the
power supply rails for the audio CODEC. The supply conditions are as follows:
.
.
AVDD = HPVDD = 3.0V, generated by WM8352 LDO1
DCVDD = DBVDD = 1.8V, generated by WM8352 DC-DC6
AC coupled headphone
(16 Ohm Load)
THD+N Amplitude (dBV)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
AVDD=HPVDD=3.0V
(WM8352 - LDO1)
DCVDD=DBVDD=1.8V
(WM8352 - DCDC6)
0
5
10
15
20
25
30
35
Output Power (mW)
AC coupled Headphone
(32 Ohm Load)
THD+N Amplitude (dBV)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
AVDD=HPVDD=3.0V
(WM8352 - LDO1)
DCVDD=DBVDD=1.8V
(WM8352 - DCDC6)
-100
0
5
10
15
20
25
30
Output Power (mW)
PD, February 2011, Rev 4.4
27
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
