SX8650 Datasheet, PDF (15/56 Pages) Semtech Corporation – World’s Lowest Power & Smallest Footprint 4-wire Resistive Touchscreen Controller with 15kV ESD

SX8650
World’s Lowest Power & Smallest Footprint 4-wire
Resistive Touchscreen Controller with 15kV ESD
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
2.7. Typical Operating Characteristics
At Ta= -40°C to +85°C, VDD=1.7V to 3.7V, PowDly=0.5 us, SetDly=0.5us, Filt=1, Resistive touch screen sensor current not
taking in account, unless otherwise noted.
CURRENT IN PEN TRIGGER MODE
500
TOUCH SENSOR
NOT ACTIVATED
400
300
200
100
0
1.5
2
2.5
3
3.5
VDD(V)
SUPPLY CURRENT VS CONVERSION RATE
VDD=1.8V - X,Y CONVERSION
100
90
Filt=7
80
70
Filt=5
60
50
Filt=3
40
30
Filt=1
20
10
0
0
1
2
3
4
5
Conversion Rate (kCPS)
SUPPLY CURRENT vs SAMPLE RATE
500
TOUCH SENSOR
X+ to X- =1000 Ohm
400 ^{Y+ to Y- =1000 Ohm}
300
200
V _DD=3.3V
V _DD=2.5V
V _DD=1.65V
100
0
0
1
2
3
4
5
Sample Rate (kCPS)
SUPPLY CURRENT in MANUAL MODE
vs TEMPERATURE
700
600
500
400
300
200
100
0
-40
-20
VDD=3.3V
VDD=1.85V
0
20
40
60
Temperature (C)
80
100
SUPPLY CURRENT VS CONVERSION RATE
VDD=1.8V - X,Y, Z1, Z2 CONVERSION
130
120
Filt=5
110
Filt=7
100
90
80
Filt=3
70
60
50
40
Filt=1
30
20
10
0
0
1
2
3
4
5
Conversion Rate (kCPS)
ACS Revision V2.15/October 2009
©2009 Semtech Corp.
Page 14
www.semtech.com