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WM9712CLGEFL/RV датащи(PDF) 9 Page - Wolfson Microelectronics plc

номер детали WM9712CLGEFL/RV
подробное описание детали  AC??7 Audio and Touchpanel CODEC
PDF  78 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM9712CLGEFL/RV датащи(HTML) 9 Page - Wolfson Microelectronics plc

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Production Data
WM9712L
w
PD, Rev 4.6, November 2011
9
TOUCHPANEL AND AUXILIARY ADC
Test Conditions
DBVDD=3.3V, DCVDD = 3.3V, AVDD = TPVDD = 3.3V, TA = +25
oC, MCLK = 24.576 MHz, unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Pins X+, X-, Y+, Y-, WIPER/AUX4, COMP1/AUX1, COMP2/AUX2 and BMON/AUX3
Input Voltage
AGND
AVDD
V
Input leakage current
AUX pin not selected as
AUX ADC input
<10
nA
ADC Resolution
12
bits
Differential Non-Linearity Error
DNL
0.25
1
LSB
Integral Non-Linearity Error
INL
2
LSB
Offset Error
4
LSB
Gain Error
6
LSB
Power Supply Rejection
PSRR
50
dB
Throughput Rate
DEL = 1111
(zero settling time)
48
kHz
Settling Time (programmable)
MCLK = 24.576MHz
0
6
ms
Conversion Time
Note: touch pressure
measurements require two
conversions
20.8
s
Switch matrix resistance
12
Programmable Pull-up resistor
RPU
RPU = 000001
55
63
70
k
Pen down detector threshold
VDD/2
V
Pressure measurement current
IP
PIL = 1
400
A
PIL = 0
200
BMON/AUX3 (pin 31 only)
Input Range
AVDD = 3.3V
AGND
5
V
AVDD = 1.8V
AGND
3.3
V
Scaling
-3%
1/3
+3%
Input Resistance (Note 1)
during measurement
30
k
average over time
30 /
duty cycle
Note:
1. Current only flows into pin 31 during a measurement. At all other times, BMON/AUX3 is effectively an open circuit.
COMPARATORS
Test Conditions
AVDD = 3.3V, TA = +25
oC, unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
COMP1/AUX1 and COMP2/AUX2 (pins 29, 30)
Input Voltage
AGND
AVDD
V
Input leakage current
pin not selected as AUX
ADC input
<10
nA
Comparator Input Offset
(COMP1, COMP2 only)
-50
+50
mV
COMP2 delay (COMP2 only)
24.576MHz crystal
0
10.9
s



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