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WM8912 데이터시트(PDF) 11 Page - Wolfson Microelectronics plc

부품명 WM8912
상세설명  Ultra Low Power DAC with Headphone Driver for Portable Audio Applications
PDF  128 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8912 데이터시트(HTML) 11 Page - Wolfson Microelectronics plc

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Production Data
WM8912
w
PD, Rev 4.0, September 2010
11
CHARGE PUMP
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Start-up Time
260
μs
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
μF
CPVOUTN Capacitor
at 2V
2
2.2
μF
CPVOUTP Capacitor
at 2V
2
2.2
μF
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
μs
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
μF
890
μs
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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