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WM8918 датащи(PDF) 11 Page - Cirrus Logic

номер детали WM8918
подробное описание детали  Ultra Low Power DAC for Portable Audio Applications
PDF  176 Pages
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производитель  CIRRUS [Cirrus Logic]
домашняя страница  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8918 датащи(HTML) 11 Page - Cirrus Logic

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Production Data
WM8918
w
PD, Rev 4.1, January 2012
11
INPUT SIGNAL PATH
PGA and Microphone Boost
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Minimum PGA gain setting
L_MODE/R_MODE= 00b or 01b
-1.55
dB
L_MODE/R_MODE= 10b
+12
Maximum PGA gain setting
L_MODE/R_MODE= 00b or 01b
+28.28
dB
L_MODE/R_MODE= 10b
+30
Single-ended to differential
conversion gain
L_MODE/R_MODE= 00b
+6
dB
PGA gain accuracy
L_MODE/R_MODE= 00b
Gain -1.5 to +6.7dB
-1
+1
dB
L_MODE/R_MODE= 00b
Gain +7.5 to +28.3dB
-1.5
+1.5
L_MODE/R_MODE= 1X
Gain +12 to +24dB
-1
+1
L_MODE/R_MODE= 1X
Gain +27 to +30dB
-1.5
+1.5
Mute attenuation
all modes of operation
100
dB
Equivalent input noise
L_MODE/R_MODE= 00b or 01b
30
214
µVrms
nV/√Hz
OUTPUT SIGNAL PATH
Stereo Playback to Headphones
- DAC input to HPOUTL+HPOUTR pins with 15
 load
Test conditions:
HPOUTL_VOL = HPOUTR_VOL = 111001b (0dB)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Output Power (per Channel)
Po
1% THD
RLoad= 30
28
0.92
-0.76
mW
Vrms
dBV
1% THD
RLoad= 15
32
0.69
-3.19
mW
Vrms
dBV
DC Offset
DC servo enabled,
calibration complete.
-1.5
+1.5
mV
Signal to Noise Ratio
SNR
A-weighted
90
96
dB
Total Harmonic Distortion + Noise
THD+N
RL=30; Po=2mW
-91
dB
RL=30; Po=20mW
-84
RL=15; Po=2mW
-87
-80
RL=15; Po=20mW
-85
Channel Separation
1kHz signal, 0dBFS
100
dB
10kHz signal, 0dBFS
90
Channel Level Matching
1kHz signal, 0dBFS
+/-1
dB
Power Supply Rejection Ratio
PSRR
217Hz, 100mVpk-pk
75
dB
1kHz, 100mV pk-pk
70



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