WM8766
Preliminary Technical Data
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
DVDD
TEST CONDITIONS
MIN
2.7
TYP
MAX
3.6
UNIT
Digital supply range
Analogue supply range
Ground
V
V
V
V
AVDD, VREFP
AGND, VREFN, DGND
2.7
5.5
0
0
Difference DGND to AGND
-0.3
+0.3
Note: Digital supply DVDD must never be more than 0.3V greater than AVDD for normal operation of the device .
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (CMOS Levels)
Input LOW level
V
0.3 x DVDD
0.1 x DVDD
V
V
V
V
IL
Input HIGH level
VIH
VOL
VOH
0.7 x DVDD
0.9 x DVDD
Output LOW
I
OL=1mA
Output HIGH
IOH= -1mA
Analogue Reference Levels
Reference Voltage
VVMID
RVMID
VREFP/2
133k
V
Potential Divider Resistance
(VREFP to VMID) and
(VMID to VREFN)
Ω
DAC Performance (Load = 10kΩ, 50pF)
0dBFs Full Scale Output
Voltage
1.0 x
VREFP/5
103
Vrms
dB
SNR (Note 1,2,4)
SNR (Note 1,2,4)
SNR (Note 1,2,4)
SNR (Note 1,2,4)
A-weighted,
@ fs = 48kHz
A-weighted
95
101
101
101
dB
@ fs = 96kHz
A-weighted
dB
@ fs = 192kHz
A-weighted
dB
@ fs = 48kHz, AVDD =
3.3V
SNR (Note 1,2,4)
A-weighted
99
dB
dB
@ fs = 96kHz, AVDD =
3.3V
Dynamic Range (Note 2,4)
DNR
A-weighted, -60dB full
scale input
95
103
Total Harmonic Distortion (THD)
Mute Attenuation
1kHz, 0dBFs
-90
100
100
50
-80
dB
dB
dB
dB
dB
1kHz Input, 0dB gain
DAC Channel Separation
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
20Hz to 20kHz
100mVp-p
45
Supply Current
Analogue Supply Current
Digital Supply Current
AVDD, VREFP = 5V
DVDD = 3.3V
13.8
11.0
mA
mA
PTD Rev 2.3 February 2004
6
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
