wm9001 Wolfson Microelectronics plc, wm9001 Datasheet - Page 12

• Manufacturer Part Number: wm9001
• Description: 1w Dual-mode Class Ab/d Speaker Driver
• Manufacturer: Wolfson Microelectronics plc

WM9001
PSRR PERFORMANCE
Note: The measurement noise floor is at approximately 88dB
w
100
90
80
70
60
50
40
30
20
90
80
70
60
50
40
0
0
2
2
4
4
CLASS AB SPKVDD PSRR
WM9001 Class AB SPKVDD PSRR
WM9001 Class AB AVDD PSRR
CLASS AB AVDD PSRR
6
6
AVDD=3.3V, SPKVDD=5.0V
AVDD=3.3V, SPKVDD=5.0V
8
8
Frequency (kHz)
Frequency (kHz)
Typical PSRR versus frequency curves are provided below. The curves were produced by
superimposing a 100mV pk-pk ripple onto a DC level at the supply pin and measuring rejection of
this signal at the output.
10
10
12
12
14
14
Differential Mode
Single-Emded Mode
16
Differential Mode
Single-Emded Mode
16
18
18
20
20
100
90
80
70
60
50
40
30
20
90
80
70
60
50
40
0
0
2
2
4
4
WM9001 Class D SPKVDD PSRR
CLASS D SPKVDD PSRR
WM9001 Class D AVDD PSRR
CLASS D AVDD PSRR
6
6
AVDD=3.3V, SPKVDD=5.0V
AVDD=3.3V, SPKVDD=5.0V
8
8
Frequency (kHz)
Frequency (kHz)
10
10
12
12
PP, June 2009, Rev 3.2
14
14
Differential Mode
Single-Emded Mode
16
Differential Mode
Single-Emded Mode
16
Pre-Production
18
18
20
20
12