wm8974gefl-v Wolfson Microelectronics plc, wm8974gefl-v Datasheet - Page 60

• Manufacturer Part Number: wm8974gefl-v
• Description: Mono Codec With Speaker Driver
• Manufacturer: Wolfson Microelectronics plc

WM8974
w
Figure 34 ADC Power Up and Down Sequence (not to scale)
BIASEN bits
Power Supply
POR
I
ADC Internal
Analogue Inputs
ADCDAT pin
ADCEN bit
(Note 3)
INPPGAEN bit
2
VMIDSEL/
S Clocks
State
(Note 4)
V
pora
POR Undefined
No Power
V
por_on
Power down
AVDD/2
DGND
Table 57 Typical POR Operation (typical values, not tested)
(Note 1)
POR
t
t
SYMBOL
midrail_on
midrail_off
t
t
midrail_on
adcint
DNC
Init
t
adcint
GD
Normal Operation
ADC enabled
MIN
TYPICAL
500
>10
2/fs
GD
INPPGA enabled
Device Ready
VMID enabled
ADC off
DNC
PD
MAX
Init
GD
t
adcint
n /fs
UNIT
ms
ADC enabled
s
Normal Operation
GD
PD, Rev 4.5, September 2008
t
midrail_off
Internal POR active
Power down
(Note 2)
V
Production Data
por_off
60