WM8750JL Datasheet, PDF (6/61 Pages) Wolfson Microelectronics plc – Stereo CODEC for Portable Audio Applications

WM8750JL
Production Data
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, T_A = +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
Analogue Inputs (LINPUT1, RINPUT1, LINPUT2, RINPUT2, LINPUT3, RINPUT3) to ADC out
Full Scale Input Signal Level
(for ADC 0dB Input at 0dB Gain)
V_INFS
AVDD/3.3
Input Resistance
PGA gain=0dB into ADC
22
Pins LINPUT1/2/3, RINPUT1/2/3
PGA gain=+30dB into
1.5
ADC
DC Measurement from
16
L/RINPUT1
MAX
UNIT
V rms
k
input pin unused
17
Input Capacitance
10
pF
Signal to Noise Ratio
SNR
AVDD = 3.3V
80
88
dB
(A-weighted)
ADCOSR=1
AVDD = 3.3V
95
ADCOSR=0
AVDD = 1.8V
85
ADCOSR=1
AVDD = 1.8V
90
ADCOSR=0
Total Harmonic Distortion
THD
-1dBFs input,
-80
dB
AVDD = 3.3V
0.01
%
-1dBFs input,
-74
AVDD = 1.8V
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
85
dB
to analogue out
DAC to Line-Out (L/ROUT2 with 10k / 50pF load)
Signal to Noise Ratio
SNR
AVDD=3.3V
90
97
dB
(A-weighted)
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
Total Harmonic Distortion plus
Noise
P_O
THD+N
Output power is very closely correlated with THD; see below.
HPVDD=1.8V, R_L=32
0.02
%
P_O=5mW
-73
dB
HPVDD=1.8V, R_L=16
P_O=5mW
0.03
-70
HPVDD=3.3V, R_L=32,
P_O=5mW
0.015
-76
HPVDD=3.3V, R_L=16,
P_O=5mW
0.02
-73
Signal to Noise Ratio
SNR
HPVDD = 3.3V
90
98
dB
(A-weighted)
HPVDD = 1.8V
93
w
PD, April 2012, Rev 4.1
6