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MAX1233_08 Datasheet, PDF (3/44 Pages) Maxim Integrated Products – ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller
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±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
ELECTRICAL CHARACTERISTICS (continued)
(DVDD = AVDD = +2.7V to +3.6V (MAX1233), DVDD = AVDD = +4.75V to +5.25V (MAX1234), external reference VREF = 2.5V
(MAX1233), VREF = 4.096V (MAX1234); fSCLK = 10MHz, fSAMPLE = 50ksps, 12-bit mode, 0.1µF capacitor at REF, TA = -40°C to
+85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Total Harmonic Distortion
SYMBOL
THD
CONDITIONS
MIN TYP MAX UNITS
-84
dB
Spurious-Free Dynamic Range
Full-Power Bandwidth
Full-Linear Bandwidth
CONVERSION RATE
Internal Oscillator Frequency
SFDR
-3dB point
SINAD > 67dB
84
dB
0.5
MHz
50
kHz
8
11.5 MHz
Aperture Delay
Aperture Jitter
30
ns
<50
ps
Maximum Serial Clock Frequency fSCLK
Duty Cycle
AUXILIARY ANALOG INPUTS (AUX1, AUX2)
Input Voltage Range
10
MHz
30
70
%
0
VREF
V
Input Leakage Current
Channel not selected or conversion
stopped
±0.1
±1
µA
Input Capacitance
BATTERY MONITOR INPUTS (BAT1, BAT2)
Input Voltage Range
Input Impedance
Accuracy
TEMPERATURE MEASUREMENT
Temperature Range
Resolution
Accuracy
INTERNAL ADC REFERENCE
Reference Output Voltage
Output Tempco
Reference Output Impedance
Reference Short-Circuit Current
VREF
TCVREF
Sampling battery
Battery monitor OFF
Internal reference
Differential method (Note 4)
Single measurement method (Note 5)
Differential method (Note 4)
Single measurement method (Note 5)
2.5V mode, TA = +25°C
1.0V mode, TA = +25°C
Normal operation
34
pF
0.5
6.0
V
10
kΩ
1
GΩ
-3
+3
%
-40
+85
°C
1.6
°C
0.3
±3
°C
±2
2.470
0.980
2.500
1.000
60
250
18
2.530
1.020
V
ppm/°C
Ω
mA
EXTERNAL ADC REFERENCE (INTERNAL REFERENCE DISABLED, REFERENCE APPLIED TO REF)
Reference Input Voltage Range
Input Impedance
(Note 6)
CS = GND or VDD
1.0
VDD
V
1
GΩ
VREF = +2.5V at 50ksps (MAX1233)
5
10
Input Current
VREF = +4.096V at 50ksps (MAX1234)
8
15
µA
Shutdown/between conversions
±0.1
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