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WM8912 数据表(PDF) 11 Page - Cirrus Logic

部件名 WM8912
功能描述  Ultra Low Power DAC with Headphone Driver
PDF  129 Pages
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制造商  CIRRUS [Cirrus Logic]
网页  http://www.cirrus.com
标志 CIRRUS - Cirrus Logic

WM8912 数据表(HTML) 11 Page - Cirrus Logic

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Production Data
WM8912
w
PD, Rev 4.1, February 2013
11
CHARGE PUMP
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Start-up Time
260
s
CPCA
Normal mode
CPVDD
V
Low power mode
CPVDD/2
V
CPCB
Normal mode
-CPVDD
V
Low power mode
-CPVDD/2
V
External component requirements
To achieve specified headphone output power and performance
Flyback Capacitor
(between CPCA and CPCB)
at 2V
1
2.2
F
CPVOUTN Capacitor
at 2V
2
2.2
F
CPVOUTP Capacitor
at 2V
2
2.2
F
FLL
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Frequency
FREF
FLL_CLK_REF_DIV = 00
0.032
13.5
MHz
FLL_CLK_REF_DIV = 01
0.064
27
MHz
Lock time
2
ms
Free-running mode start-up time
VMID enabled
100
s
Free-running mode frequency accuracy
Reference supplied
initially
+/-10
%
No reference provided
+/-30
%
OTHER PARAMETERS
VMID Reference
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Midrail Reference Voltage (VMID pin)
-3%
AVDD/2
+3%
V
Charge up time (from fully discharged
to +5% or -10% of VMID)
External capacitor
4.7
F
890
s
Digital Inputs / Outputs
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input HIGH Level
VIH
0.7
DBVDD
V
Input LOW Level
VIL
0.3
DBVDD
V
Output HIGH Level
VOH
IOH = +1mA
0.9
DBVDD
V
Output LOW Level
VOL
IOL = -1mA
0.1
DBVDD
V



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