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WM8945ECS/R датащи(PDF) 12 Page - Wolfson Microelectronics plc

номер детали WM8945ECS/R
подробное описание детали  Mono Low-Power CODEC with Video Buffer and Touch Panel Controller
PDF  169 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8945ECS/R датащи(HTML) 12 Page - Wolfson Microelectronics plc

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WM8945
Production Data
w
PD, May 2011, Rev 4.1
12
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
AuxADC and Touch Panel Interface
Maximum input signal
level (changes in
proportion to LDOVDD)
3.3
V
Input leakage current
AUX pin not selected as
AUXADC input
10
nA
Input resistance
50
Input capacitance
10
pF
AUXADC resolution
12
Bits
AUXADC conversion
time
20.8
s
AUXADC accuracy
6
LSB
Touch Panel switch
matrix resistance
20
Maximum Pen-Down
detection sensitivity pull-
up resistor
55
63
70
k
Touch Pressure current
source
TCH_ISEL = 0
230
uA
TCH_ISEL = 1
460
uA
Pen-Down detection
threshold (changes in
proportion to LDOVDD)
1.65
V
Digital Inputs/Outputs
Input high level
0.7
DBVDD
V
Input low level
0.3
DBVDD
V
Output high level
IOL = 1mA
0.8
DBVDD
V
Output low level
IOH = -1mA
0.2
DBVDD
V
Input capacitance
10
pF
Input leakage
All digital pins except CIFMODE
-900
900
nA
CIFMODE pin
-90
90
nA
LDO Regulator
Input voltage
LDOVDD
2.4
3.3
3.6
V
Output voltage
LDOVOUT
LDO_REF_SEL = 0
3.0
V
Maximum output current
(see note)
50
mA
Output voltage accuracy
ILOAD = 50mA
2
%
Quiescent current
No Load
55
A
Leakage current
1
A
PSRR (with respect to
LDOVDD)
217Hz
1kHz
40
49
dB
Video Buffer
Maximum output voltage
swing
Vom
f=100kHz, THD=1%
1.10
1.25
1.50
V pk-pk
Voltage gain
Av
VB_GAIN = 1, RREF=187,
RLOAD=75, RSOURCE=75
5.08
6
7.94
dB
VB_GAIN = 0, RREF=187,
RLOAD=75, RSOURCE=75
-0.92
0
1.94
dB
Gain step size
6
dB
Differential gain
DG
Vin = 1V pk-pk
-2.0
0.3
+2.0
%
Differential phase
DP
Vin = 1V pk-pk
-2.0
0.7
+2.0
Deg
SNR
VSNR
40
60
100
dB



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