WM8234
Product Brief
GENERAL CHARACTERISTICS
Test Conditions
AVDD = LDOVDD = DBVDD = 3.3V , AGND = LDOGND = DBGND= 0V, TA = 25C, MCLK= 23.3MHz unless otherwise stated.
PARAMETER
SYMBOL
TEST
MIN
TYP
MAX
UNIT
CONDITIONS
References
Upper reference voltage
VREF1C
VREF3C
ADCFS=0
ADCFS=1
ADCFS=0
ADCFS=1
2.05
2.25
1.25
1.05
1.2
V
V
V
V
V
V
V
Lower reference voltage
Input return bias voltage
VREF2C
Diff. Reference voltage (VREF1C-
VREF3C)
VREF1C3C
ADCFS=0
ADCFS=1
0.8
1.2
Output resistance VREF1C,
VREF3C, VREF2C
1
VRLC/Reset-Level Clamp (RLC)
RLC switching impedance
RLC short-circuit current
RLC output resistance
RLC Hi-Z leakage current
RLCDAC resolution
50
2
mA
2
VRLC = 0 to AVDD
1
A
5
bits
V/step
V/step
V
RLCDAC step size
VRLCSTEP
VRLCSTEP
VRLCBOT
VRLC_TOP_SEL=0
VRLC_TOP_SEL=1
0.09
0.048
0.2
RLCDAC output voltage at
code 0(hex)
VRLC_TOP_SEL=0,
VRLC_VSEL[4:0]=00000
VRLC_TOP_SEL=1,
VRLC_VSEL[4:0]=00000
VRLC_TOP_SEL=0,
VRLC_VSEL[4:0]=11111
VRLC_TOP_SEL=1,
VRLC_VSEL[4:0]=11111
VRLCBOT
VRLCTOP
VRLCTOP
0.11
3.0
V
V
V
RLCDAC output voltage at
code 1F(hex)
1.6
VRLC DNL
VRLC INL
+/- 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
0.75
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
AVDD
V
V
Low level input voltage
0.2
AVDD
High level input current
Low level input current
Input capacitance
IIH
IIL
CI
1
1
A
A
pF
5
Product Brief, Rev 3.0, February 2012
9
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
