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