Production Data
CHARGE PUMP
PARAMETER
TEST CONDITIONS
Start-up Time
CPCA
Normal mode
Low power mode
CPCB
Normal mode
Low power mode
External component requirements
To achieve specified headphone output power and performance
Flyback Capacitor
at 2V
(between CPCA and CPCB)
CPVOUTN Capacitor
at 2V
CPVOUTP Capacitor
at 2V
WM8912
MIN
TYP
260
CPVDD
CPVDD/2
-CPVDD
-CPVDD/2
MAX
UNIT
μs
V
V
V
V
1
2.2
μF
2
2.2
μF
2
2.2
μF
FLL
PARAMETER
Input Frequency
Lock time
Free-running mode start-up time
Free-running mode frequency accuracy
SYMBOL
FREF
TEST CONDITIONS
FLL_CLK_REF_DIV = 00
FLL_CLK_REF_DIV = 01
VMID enabled
Reference supplied
initially
No reference provided
MIN
0.032
0.064
TYP
2
100
+/-10
+/-30
MAX
13.5
27
UNIT
MHz
MHz
ms
μs
%
%
OTHER PARAMETERS
VMID Reference
PARAMETER
TEST CONDITIONS
MIN
Midrail Reference Voltage (VMID pin)
-3%
Charge up time (from fully discharged
to +5% or -10% of VMID)
External capacitor
4.7μF
TYP
AVDD/2
890
MAX
+3%
UNIT
V
μs
Digital Inputs / Outputs
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
VIH
0.7×DBVDD
VIL
VOH
IOH = +1mA
0.9×DBVDD
VOL
IOL = -1mA
V
0.3×DBVDD
V
V
0.1×DBVDD
V
w
PD, Rev 4.0, September 2010
11