WM8224
Production Data
GENERAL CHARACTERISTICS
Test Conditions
AVDD = DVDD = 3.3V, AGND = DGND = 0V, TA = 25C
PARAMETER
SYMBOL
TEST
MIN
TYP
MAX
UNIT
CONDITIONS
References
Upper reference voltage
VRT
VRB
LOWREFS=0
LOWREFS=1
LOWREFS=0
LOWREFS=1
2.05
1.85
1.05
1.25
1.25
1.0
V
V
V
V
V
V
V
Lower reference voltage
Input return bias voltage
VRX
VRTB
Diff. Reference voltage (VRT-
VRB)
LOWREFS=0
LOWREFS=1
0.6
Output resistance VRT, VRB, VRX
VRLC/Reset-Level Clamp (RLC)
RLC switching impedance
VRLC short-circuit current
VRLC output resistance
VRLC Hi-Z leakage current
RLCDAC resolution
1
50
2
mA
2
VRLC = 0 to AVDD
1
A
4
bits
RLCDAC step size
VRLCSTEP
VRLCSTEP
RLCDACRNG=0,
RLCDACRNG=1,
LOWREFS=0
0.173
0.11
V/step
V/step
VRLCSTEP
RLCDACRNG=1,
LOWREFS=1
0.097
V/step
RLCDAC output voltage at
code 0(hex)
VRLCBOT
VRLCBOT
VRLCTOP
VRLCTOP
RLCDACRNG=0,
RLCDAC[3:0]=0000,
0.4
0.4
V
V
V
V
RLCDACRNG=1,
RLCDAC[3:0]=0000,
RLCDAC output voltage at
code F(hex)
RLCDACRNG=0,
RLCDAC[3:0]=1111,
3.0
RLCDACRNG=1,
RLCDAC[3:0]=1111,
LOWREFS = 0
2.05
VRLCTOP
RLCDACRNG=1,
RLCDAC[3:0]=1111,
LOWREFS = 1
1.85
V
VRLC DNL
VRLC INL
-0.5
-0.5
+0.5
+0.5
LSB
LSB
Offset DAC, Monotonicity Guaranteed
Resolution
8
bits
LSB
Differential non-linearity
Integral non-linearity
Step size
DNL
INL
0.1
0.5
1
0.75
2.04
-250
+250
LSB
mV/step
mV
Output voltage
Code 00(hex)
Code FF(hex)
mV
DIGITAL SPECIFICATIONS
Digital Inputs
High level input voltage
VIH
VIL
0.7
DVDD
V
V
Low level input voltage
0.2
DVDD
High level input current
Low level input current
Input capacitance
IIH
IIL
CI
1
1
A
A
pF
5
PD, Rev 4.1, June 2012
9
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
