WM8718 Datasheet, PDF (6/27 Pages) Wolfson Microelectronics plc – 24 BIT DIFFERENTIAL STEREO DAC WITH VOLUME CONTROL

WM8718
DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
Digital supply range
DVDD
3.0
Analogue supply range
AVDD
3.0
Ground
AGND, DGND
0
Difference DGND to AGND
Supply current
-0.3
0
AVDD = 3.3V
0.191^a
19
AVDD = 5V
0.191^a
22
Supply current
DVDD = 3.3V
160 uA
7.1
DVDD = 5V
160 uA
8.3
Production Data
MAX
5.5
5.5
+0.3
UNIT
V
V
V
V
mA
mA
mA
mA
Notes:
1. This value represents the current usage when there are no switching digital inputs, MCLK is applied and the chip is in
power down mode
2. Digital supply DVDD must never be more than 0.3V greater than AVDD.
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND, DGND = 0V, TA = +25^oC, fs = 48kHz, MCLK = 256fs unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
Digital Logic Levels (TTL Levels)
Input LOW level
VIL
0.8
Input HIGH level
VIH
2.0
Output LOW
VOL
IOL = 1mA
AGND + 0.3V
Output HIGH
VOH
IOH = 1mA
DVDD – 0.3V
Analogue Reference Levels
Reference voltage
VMID
AVDD/2 -
50mV
AVDD/2
AVDD/2 +
50mV
Potential divider resistance
RVMID
8.7k
DAC Output (Load = 10kΩ 50pF)
0dBFs Full scale output voltage
At DAC outputs
2x
AVDD/5
SNR (Note 1,2,3)
A-weighted,
105
111
@ fs = 48kHz
SNR (Note 1,2,3)
A-weighted
109
@ fs = 96kHz
SNR (Note 1,2,3)
A-weighted
109
@ fs = 192kHz
SNR (Note 1,2,3)
A-weighted,
105
@ fs = 48kHz
AVDD = 3.3V
SNR (Note 1,2,3)
A-weighted
102
@ fs = 96kHz
AVDD = 3.3V
SNR (Note 1,2,3)
Non ‘A’ weighted @ fs
108
= 48kHz
THD (Note 1,2,3)
1kHz, 0dBFs
-100
-80
THD+N (Dynamic range, Note 2)
1kHz, -60dBFs
105
111
DAC channel separation
100
UNIT
V
V
V
V
V
Ω
Vrms
dB
dB
dB
dB
dB
dB
dB
dB
dB
w
PD Rev 4.1 March 2004
6