wm9001 Wolfson Microelectronics plc, wm9001 Datasheet - Page 8

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

WM9001
ELECTRICAL CHARACTERISTICS
w
Test Conditions
AVDD = 3.3V; SPKVDD = 5V, T
Analogue Input Pins (LIN, LIP)
Maximum Full-Scale Input Signal Level
Differential Mode (INP_SEL=0): This is
the maximum on each input pin; the total
differential input is 2x this figure.
Single-Ended Mode (INP_SEL=1): This is
the maximum on LIP.
Note that the maximum signal level scales
in proportion to AVDD (AVDD/3.3).
Input Resistance – Differential Mode
(INP_SEL=0)
Input Resistance – Single-Ended Mode
(INP_SEL=1)
Input Capacitance
Speaker Driver Performance
SNR (A-weighted)
THD (P
THD+N (P
THD (P
THD+N (P
SNR (A-weighted)
THD (P
THD+N (P
THD (P
THD+N (P
Mute Attenuation
Common Mode Rejection Ratio
Bandwidth
AVDD PSRR
SPKVDD PSRR
DC Offset at load
SPKVDD Leakage Current
AVDD Leakage Current
Reference Levels
VMID Midrail Reference Voltage
Output Common Mode Voltage
(Note: BSEL[2:0]=110 and BSEL[2:0]=111
are reserved settings)
O
O
O
O
=0.5W)
=1.0W)
=0.5W)
=1.0W)
O
O
O
O
=0.5W)
=1.0W)
=0.5W)
=1.0W)
PARAMETER
A
= +25
o
C, 1kHz input signal, BSEL[2:0] = 000 unless otherwise stated.
Gain=2.1dB (BSEL[2:0]=001)
Gain=2.9dB (BSEL[2:0]=010)
Gain=3.6dB (BSEL[2:0]=011)
Gain=4.5dB (BSEL[2:0]=100)
Gain=5.1dB (BSEL[2:0]=101)
Differential and Single-Ended
Differential and Single-Ended
Gain=0dB (BSEL[2:0]=000)
100mV pk-pk ripple, 217Hz
BSEL[2:0] = 011 (1.52x)
BSEL[2:0] = 011 (1.52x)
Device disabled (EN=0)
8Ω Bridge Tied Load
8Ω Bridge Tied Load
TEST CONDITIONS
Differential Mode
BSEL[2:0] = 000
BSEL[2:0] = 001
BSEL[2:0] = 010
BSEL[2:0] = 011
BSEL[2:0] = 100
BSEL[2:0] = 101
All gain settings
Class AB Mode
Class D Mode
Input Modes
Input Modes
EN=0
EN=0
-3%
MIN
0
1.00 x VMID
1.27 x VMID
1.40 x VMID
1.52 x VMID
1.67 x VMID
1.80 x VMID
AVDD/2
TYP
160
123
112
103
104
100
1.0
-92
-87
-83
-78
-79
-77
-77
-75
0.3
94
87
20
10
97
50
60
83
0
5
9
PP, June 2009, Rev 3.2
+3%
MAX
22
Pre-Production
Vrms
UNIT
dBV
kHz
mV
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
μA
μA
V
V
8