WM8352
Production Data
7.9 DIGITAL INTERFACES
Test Conditions
TA = +25ºC unless otherwise noted.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
SDA, SCLK, MCLK, BCLK, LRCLK, ADCDATA, DACDATA, GPIO4 to GPIO9
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
VIH
VIL
0.7×DBVDD
0.9×DBVDD
V
0.3×DBVDD
V
V
V
VOH
VOL
sinking 1mA
sourcing 1mA
0.1xDBVDD
7.10 AUXILIARY ADC
Test Conditions
TA = +25ºC unless otherwise noted.
PARAMETER
CONDITIONS
SYMBOL
MIN
TYP
MAX
UNITS
ꢀ
Input resistance
AUXADC_SCALEn [1:0] = 00
AUXADC_SCALEn [1:0] = 01
AUXADC_SCALEn [1:0]= 10
AUXADC_SCALEn [1:0] = 11
∞
∞
∞
(AUX1,2,3,4, USB, LINE, BATT
and CHIPTEMP)
2.2
kꢀ
330
330
660
440
kꢀ
kꢀ
Input Voltage range.
AUXADC_SCALEn [1:0] = 01
AUXADC_REF = 0
VBG
VRTC
V
V
V
V
V
V
AUX1,2,3,4,USB,LINE,BATT and
CHIPTEMP
AUXADC_SCALEn [1:0] = 01
AUXADC_REF = 1
(VRTC = 2.7V & VLINE (max)= 5.5V,
VBG=1.25V)
AUXADC_SCALEn [1:0] = 10
AUXADC_REF = 0
2 x VBG
2 x VRTC
VLINE
AUXADC_SCALEn [1:0] = 10
AUXADC_REF = 1
AUXADC_SCALEn [1:0] = 11
AUXADC_REF = 0
AUXADC_SCALEn [1:0] = 11
AUXADC_REF = 1
4 x VBG
Input capacitance
Input is selected
(AUX1,2,3,4, USB, LINE, BATT
and CHIPTEMP)
(INPUT_SELECT) and
AUXADC_SCALEn [1:0] not = 00
2.08
pF
VRTC quiescent current
VRTC quiescent current
AUX_RBMODE = 0,
AUXADC_ENA = 1
AUX_RBMODE = 1
AUXADC_ENA = 1
140
151
μA
μA
LINE_INT quiescent current
ADCCLK frequency
ADC Resolution
mA
<<1
800
fAUXCLK
400
470/512
12
kHz
bits
ADC Conversion Time
CLK
13
periods
Aux ADC accuracy
Non-calibrated (calibration
possible using the VBG input on
AUX3). 1% of this variation due
to BG variation over temperature.
2.2
%
PD, February 2011, Rev 4.4
24
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
