WM8785(2005) データシートの表示（PDF） - Wolfson Microelectronics plc
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WM8785 Datasheet PDF : 31 Pages
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WM8785
Pre-Production
ELECTRICAL CHARACTERISTICS
Test Conditions
DVDD = 3.3V, AVDD = 5.0V, TA = +25oC, 1kHz signal, A-weighted, fs = 48kHz, MCLK = 256fs, 24-bit audio data, Slave Mode
unless otherwise stated.
PARAMETER
ADC Performance
Full Scale Input Signal Level
(for ADC 0dB Input)
Input resistance
Input capacitance
Signal to Noise Ratio (Note
1,2,4)
SYMBOL
SNR
Signal to Noise Ratio (Note
1,2,4)
SNR
Signal to Noise Ratio (Note
1,2,4)
SNR
Total Harmonic Distortion
THD
Total Harmonic Distortion
THD
Dynamic Range
Channel Level Matching
Power Supply Rejection Ratio
DNR
PSRR
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
Input HIGH level
VIH
Input leakage current
Input capacitance
Output LOW
VOL
Output HIGH
VOH
Analogue Reference Levels
Midrail Reference Voltage
VMID
Potential Divider Resistance
RVMID
Buffered Reference Voltage
VREF
TEST CONDITIONS
MIN
TYP
MAX
2.0
A-weighted,
104
@ fs = 48kHz
Unweighted,
@ fs = 48kHz
A-weighted,
@ fs = 96kHz
Unweighted,
@ fs = 96kHz
A-weighted,
@ fs = 192kHz
Unweighted,
@ fs = 192kHz
1kHz, -0.1dB Full Scale
@ fs = 48kHz
1kHz, -0.1dB Full Scale
@ fs = 96kHz
1kHz, -0.1dB Full Scale
@ fs = 192kHz
1kHz, -0.1dB Full Scale
@ fs = 48kHz
1kHz, -0.1dB Full Scale
@ fs = 96kHz
1kHz, -0.1dB Full Scale
@ fs = 192kHz
-60dBFS
104
20kHz signal
1kHz 100mVpp, applied
to AVDD, DVDD
20Hz to 20kHz
100mVpp
10
10
111
108
111
108
111
108
-102
-102
-102
0.0008
0.0008
0.0008
111
0.1
50
45
IOL=1mA
IOH= -1mA
0.3 x DVDD
0.7 x DVDD
-1
±0.2
+1
5
0.1 x DVDD
0.9 x DVDD
AVDD to VMID and
VMID to VREFGND
AVDD to VMID and
VMID to GND
–3%
–3%
AVDD/2
50
0.8 x AVDD
+3%
+3%
UNIT
Vrms
kΩ
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
%
%
%
dB
dB
dB
dB
V
V
µA
pF
V
V
V
kΩ
V
w
PP Rev 3.0 December 2005
6
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