MAX1233_08 Datasheet, PDF (9/44 Pages) Maxim Integrated Products – ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller

±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
Typical Operating Characteristics (continued)
(AV_DD = DV_DD = 3V (MAX1233) or 5V (MAX1234), external V_REF = +2.5V (MAX1233), external V_REF = +4.096V (MAX1234), f_SCLK =
10MHz (50% duty cycle), f_SAMPLE = 20ksps, C_LOAD = 50pF, 0.1µF capacitor at REF, T_A = +25°C, unless otherwise noted.)
ADC EXTERNAL REFERENCE INPUT
CURRENT vs. SAMPLING RATE
8
MAX1233
V_REF = +2.5V
ADC SUPPLY CURRENT
vs. SAMPLING RATE
1000
6
100
4
10
2
1
0
100
1k
10k
100k
f_SAMPLE (Hz)
0.1
1
10 100 1k 10k 100k
f_SAMPLE (Hz)
ADC SUPPLY CURRENT
vs. SUPPLY VOLTAGE
250
EXTERNAL REF
f_SAMPLE = 20ksps
200
150
100
50
0
2.7 3.2 3.7 4.2 4.7 5.2
AV_DD (V)
DAC INTEGRAL NONLINEARITY vs. CODE
0.075
0.050
0.025
0
-0.025
-0.050
-0.075
-0.100
0
50 100 150 200 250 300
CODE
ADC SUPPLY CURRENT
vs. TEMPERATURE
140
AV_DD = +3V
120
100
80
60
40
20
0
-40 -20
0 20 40 60 80
TEMPERATURE (°C)
DAC DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
0.075
0.050
0.025
0
-0.025
-0.500
-0.075
-0.100
0
50 100 150 200 250 300
OUTPUT CODE
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