MAX11803 Maxim Integrated Products, MAX11803 Datasheet - Page 13

• Manufacturer Part Number: MAX11803
• Description: (MAX11800 - MAX11803) Ultra-Small Resistive Touch-Screen Controllers
• Manufacturer: Maxim Integrated Products

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(V
noncontinuous AUX input. SPI = 10MHz and I
Y+ to Y- = 371Ω).)
Low-Power, Ultra-Small Resistive Touch-Screen
DD
3.0
2.5
2.0
1.5
1.0
0.5
0
= 1.8V at T
0
sps = SAMPLES PER SECOND
DIRECT CONVERSION
MODE—AUXILIARY INPUT
20
AVERAGE SUPPLY CURRENT
40
2.08
2.06
2.04
2.02
2.00
1.98
1.96
1.94
1.92
1.90
vs. SAMPLING RATE
A
60
SAMPLING RATE (sps)
1.8
= -40°C to +85°C (T
80
FREQUENCY vs. SUPPLY VOLTAGE
______________________________________________________________________________________
INTERNAL OSCILLATOR CLOCK
100
120
2.4
140
V
160
DD
(V)
180
A
200
3.0
Controllers with I
= -40°C, T
2
C = 400kHz, unless otherwise noted. Resistive touch-screen panel (X+ to X- = 608Ω,
120
100
Typical Operating Characteristics (continued)
80
60
40
20
0
3.6
A
8
= 0°C, T
AUXILIARY INPUT DATA
SAMPLED AT 1ksps AND
2ksps WITH EIGHT AND
16 SAMPLES
AVERAGING
ENABLED
EQUIVALENT SAMPLING RATE (ksps)
AVERAGE SUPPLY CURRENT
ksps = KILO-SAMPLES PER SECOND
vs. SAMPLING RATE
A
= +25°C, and T
16
24
A
= +85°C), 12-bit mode, all measurements using
160
140
120
100
32
80
60
40
20
0
2
0
DIRECT EDGE MODE
DATA TAKEN WITH
RESISTIVE TOUCH SENSOR
C/SPI Interface
AUTONOMOUS MODE
2.08
2.06
2.04
2.02
2.00
1.98
1.96
1.94
1.92
1.90
POWER CONSUMPTION
50
DIRECT CONTINUOUS MODE
-40
vs. SAMPLE RATE
SAMPLE RATE (cps)
FREQUENCY vs. TEMPERATURE
V
INTERNAL OSCILLATOR CLOCK
DD
-15
100
= 1.8V
cps = COORDINATES
PER SECOND
TEMPERATURE (NC)
10
V
DD
150
V
= 3.6V
DD
= 3.0V
35
200
60
13
85