WM8768 Ver la hoja de datos (PDF) - Wolfson Microelectronics plc
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WM8768 Datasheet PDF : 38 Pages
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WM8768
Production Data
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
Digital supply range
DVDD
2.7
3.6
Analogue reference supply
VREFP
2.7
5.5
Analogue supply range
AVDD
2.7
5.5
Ground
AGND, VREFN, DGND
0
Difference DGND to AGND
-0.3
0
+0.3
Note: Digital supply DVDD must never be more than 0.3V greater than AVDD for normal operation of the device.
UNIT
V
V
V
V
V
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs, unless
otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
Input HIGH level
VIH
0.7 x DVDD
0.3 x DVDD
V
V
Output LOW
VOL
IOL=1mA
0.1 x DVDD
V
Output HIGH
VOH
IOH= -1mA
0.9 x DVDD
V
Analogue Reference Levels
Reference voltage
VVMID
VREFP/2
V
Potential divider resistance
RVMID
VREFP to VMID and
100
kΩ
VMID to VREFN
DAC Performance (Load = 10kΩ, 50pF)
0dBFs Full scale output voltage
1.0 x
Vrms
VREFP/5
SNR (Note 1,2,4)
A-weighted,
95
103
dB
@ fs = 48kHz
SNR (Note 1,2,4)
A-weighted
101
dB
@ fs = 96kHz
SNR (Note 1,2,4)
A-weighted
101
dB
@ fs = 192kHz
SNR (Note 1,2,4)
A-weighted
101
dB
@ fs = 48kHz, AVDD =
3.3V
SNR (Note 1,2,4)
A-weighted
96
dB
@ fs = 96kHz, AVDD =
3.3V
Dynamic Range (Note 2,4)
DNR
A-weighted, -60dB full
95
103
dB
scale input
Total Harmonic Distortion (THD)
(Note 4)
1kHz, 0dBFs
-90
-83
dB
Mute Attenuation
1kHz Input, 0dB gain
100
dB
DAC channel separation
100
dB
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
50
dB
20Hz to 20kHz
45
dB
100mVp-p
Supply Current
Analogue supply current
AVDD = 5V
18.4
mA
Digital Supply Current
DVDD = 3.3V
14.6
mA
w
PD Rev 4.1 March 2005
6
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