WM8750JL
Production Data
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, TA = +25oC, 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
V rms
k
Analogue Inputs (LINPUT1, RINPUT1, LINPUT2, RINPUT2, LINPUT3, RINPUT3) to ADC out
Full Scale Input Signal Level
(for ADC 0dB Input at 0dB Gain)
Input Resistance
VINFS
AVDD/3.3
PGA gain=0dB into ADC
22
Pins LINPUT1/2/3, RINPUT1/2/3
PGA gain=+30dB into
ADC
1.5
DC Measurement from
L/RINPUT1
16
input pin unused
17
10
88
Input Capacitance
Signal to Noise Ratio
(A-weighted)
pF
dB
SNR
AVDD = 3.3V
ADCOSR=1
AVDD = 3.3V
ADCOSR=0
AVDD = 1.8V
ADCOSR=1
AVDD = 1.8V
ADCOSR=0
-1dBFs input,
AVDD = 3.3V
-1dBFs input,
AVDD = 1.8V
1kHz signal
80
95
85
90
Total Harmonic Distortion
THD
-80
0.01
-74
dB
%
0.02
85
ADC Channel Separation
Channel Matching
dB
dB
1kHz signal
-0.5
0.5
Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT)
0dB Full scale output voltage
AVDD/3.3
Vrms
dB
Mute attenuation
1kHz, full scale signal
MONOOUT pin
analogue in
90
81
85
Channel Separation
dB
to analogue out
DAC to Line-Out (L/ROUT2 with 10k / 50pF load)
Signal to Noise Ratio
(A-weighted)
SNR
AVDD=3.3V
AVDD=1.8V
AVDD=3.3V
AVDD=1.8V
1kHz signal
90
97
94
dB
dB
dB
Total Harmonic Distortion
THD
-85
-79
100
Channel Separation
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
0.02
-73
%
PO=5mW
HPVDD=1.8V, RL=16
PO=5mW
dB
0.03
-70
HPVDD=3.3V, RL=32,
0.015
-76
PO=5mW
HPVDD=3.3V, RL=16,
0.02
-73
PO=5mW
Signal to Noise Ratio
(A-weighted)
SNR
HPVDD = 3.3V
HPVDD = 1.8V
90
98
dB
93
PD, April 2012, Rev 4.1
6
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
