Production Data
WM8750L
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, TA = +25oC,
1kHz signal, fs = 48kHz, 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 = 3.3V
AVDD = 1.8V
1.0
0.545
22
L/RINPUT1 to ADC,
PGA gain = 0dB
L/RINPUT1 to ADC,
PGA gain = +30dB
1.5
16
L/RINPUT1 unused
DC Measurement
L/RINPUT1 unused
17
10
Input Capacitance
Signal to Noise Ratio
(A-weighted)
pF
dB
SNR
THD
AVDD = 3.3V
AVDD = 1.8V
-1dBFs input,
AVDD = 3.3V
-1dBFs input,
AVDD = 1.8V
1kHz signal
80
95
90
Total Harmonic Distortion
-82
0.008
-74
0.02
85
dB
%
ADC Channel Separation
Channel Matching
dB
dB
1kHz signal
0.2
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
98
93
dB
dB
dB
Total Harmonic Distortion
THD
-84
-80
100
Channel Separation
Headphone Output (LOUT1/ROUT1, using capacitors)
Output Power per channel
Total Harmonic Distortion
PO
Output power is very closely correlated with THD; see below.
THD
HPVDD=1.8V, RL=32
0.016
-76
%
PO=5mW
HPVDD=1.8V, RL=16
PO=5mW
dB
0.022
-73
HPVDD=3.3V, RL=32,
0.013
-78
PO=20mW
HPVDD=3.3V, RL=16,
0.018
-75
PO=20mW
Signal to Noise Ratio
(A-weighted)
SNR
HPVDD = 3.3V
HPVDD = 1.8V
92
96
dB
96
PD, Rev 4.4, August 2012
7
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
