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WM8750 Datasheet(PDF) 6 Page - Wolfson Microelectronics plc

Part # WM8750
Description  Stereo CODEC for Portable Audio Applications
PDF  60 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8750 Datasheet(HTML) 6 Page - Wolfson Microelectronics plc

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WM8750BL
Production Data
w
PD, Rev 4.1, August 2012
6
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, TA = +25
oC, 1kHz signal, fs = 48kHz, ADCOSR=1, DACOSR=1,
PGA gain = 0dB, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analogue Inputs (LINPUT1, RINPUT1, LINPUT2, RINPUT2, LINPUT3, RINPUT3) to ADC out
Full Scale Input Signal Level
(for ADC 0dB Input at 0dB Gain)
VINFS
AVDD/3.3
V rms
Input Resistance
Pins LINPUT1/2/3, RINPUT1/2/3
PGA gain=0dB into ADC
22
k
PGA gain=+30dB into
ADC
1.5
DC Measurement from
L/RINPUT1
16
input pin unused
17
Input Capacitance
10
pF
Signal to Noise Ratio
(A-weighted)
SNR
AVDD = 3.3V
80
88
dB
AVDD = 1.8V
85
Total Harmonic Distortion
THD
-1dBFs input,
AVDD = 3.3V
-80
0.01
dB
%
-1dBFs input,
AVDD = 1.8V
-74
0.02
ADC Channel Separation
1kHz signal
85
dB
Channel Matching
1kHz signal
-0.5
0.5
dB
Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT)
0dB Full scale output voltage
AVDD/3.3
Vrms
Mute attenuation
1kHz, full scale signal
90
dB
MONOOUT pin
81
Channel Separation
analogue in
to analogue out
85
dB
DAC to Line-Out (L/ROUT2 with 10k
 / 50pF load)
Signal to Noise Ratio
(A-weighted)
SNR
AVDD=3.3V
90
97
dB
AVDD=1.8V
94
Total Harmonic Distortion
THD
AVDD=3.3V
-85
dB
AVDD=1.8V
-79
Channel Separation
1kHz signal
100
dB
Headphone Output (LOUT1/ROUT1, using capacitors)
Output Power per channel
PO
Output power is very closely correlated with THD; see below.
Total Harmonic Distortion plus
Noise
THD+N
HPVDD=1.8V, RL=32
PO=5mW
0.02
-73
%
dB
HPVDD=1.8V, RL=16
PO=5mW
0.03
-70
HPVDD=3.3V, RL=32,
PO=5mW
0.015
-76
HPVDD=3.3V, RL=16,
PO=5mW
0.02
-73
Signal to Noise Ratio
(A-weighted)
SNR
HPVDD = 3.3V
90
98
dB
HPVDD = 1.8V
93



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