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WM8904ECS/R 数据表(PDF) 18 Page - Wolfson Microelectronics plc

部件名 WM8904ECS/R
功能描述  Ultra Low Power CODEC for Portable Audio Applications
PDF  188 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8904ECS/R 数据表(HTML) 18 Page - Wolfson Microelectronics plc

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WM8904
Pre-Production
w
PP, Rev 3.3, September 2012
18
BYPASS PATH
Differential Stereo Line Input to Stereo Line Output- IN2L-IN3L / IN2R-IN3R pins to LINEOUTL+LINEOUTR pins with 10k
 /
50pF load
Test conditions:
L_MODE = R_MODE = 01b (Differential Line)
LIN_VOL = RIN_VOL = 00101b (0dB)
LINEOUTL_VOL = LINEOUTR_VOL = 111001b (0dB)
Total signal path gain = 0dB
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Full Scale Output Signal Level
1.0
0
2.83
Vrms
dBV
Vpk-pk
Signal to Noise Ratio
SNR
A-weighted
90
100
dBV
Total Harmonic Distortion + Noise
THD+N
-1dBV input
-92
-85
dBV
Channel Separation
1kHz signal, -1dBV
90
dB
10kHz signal, -1dBV
80
Channel Level Matching
1kHz signal, -1dBV
+/-1
dB
Power Supply Rejection Ratio
PSRR
217Hz, 100mV pk-pk
45
dB
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
%



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