WM8750L Просмотр технического описания (PDF) - Wolfson Microelectronics plc
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WM8750L Datasheet PDF : 56 Pages
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WM8750L
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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
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 = 3.3V
AVDD = 1.8V
1.0
0.545
Input Resistance
Selected for ADC,
12
20
PGA gain = 0dB
Selected for ADC,
1
1.5
PGA gain = +30dB
Selected for mixer
TBD
Input unused
TBD
Input Capacitance
10
Signal to Noise Ratio
SNR
AVDD = 3.3V
90
95
(A-weighted)
AVDD = 1.8V
90
Dynamic Range
-60dBFs
90
95
Total Harmonic Distortion
THD
-0.5dBFs input,
-90
-84
AVDD = 3.3V
0.003
0.006
-0.5dBFs input,
-84
-74
AVDD = 1.8V
0.006
0.02
ADC Channel Separation
1kHz signal
85
Channel Matching
1kHz signal
0.2
Programmable Gain Amplifier (PGA)
Programmable Gain
-17.25
30
Programmable Gain Step Size
Monotonic
0.5
0.75
1.0
Channel Matching
1kHz signal, 0dB Fs input
0.2
Automatic Level Control (ALC)
Target Record Level
-28.5
-6
Gain Hold Time
tHLD
MCLK = 12.288MHz
0, 2.67, 5.33, 10.67, … , 43691
(time doubles with each step)
Gain Ramp-Up (Decay) Time
tDCY
24, 48, 96, … , 2458
(time doubles with each step)
Gain Ramp-Down (Attack) Time
tATK
: DAC to Line-Out (L/ROUT2 with 10k / 50pF load)
6, 12, 24, … , 6140
(time doubles with each step)
Signal to Noise Ratio
SNR
AVDD=3.3V
TBD
98
(A-weighted)
AVDD=1.8V
95
Total Harmonic Distortion
THD
AVDD=3.3V
-95
AVDD=1.8V
-90
Channel Separation
1kHz signal
90
Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT)
0dB Full scale output voltage
AVDD/3.3
Programmable Gain
1kHz signal
-67
+6
Programmable Gain Steps
Monotonic
80
Mute attenuation
1kHz, full scale signal
85
Channel Separation
80
90
UNIT
V rms
kΩ
pF
dB
dB
dB
%
dB
dB
dB
dB
dB
dBFS
ms
ms
ms
dB
dB
dB
Vrms
dB
steps
dB
dB
PP Rev 1.77 May 2003
6
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