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±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
ABSOLUTE MAXIMUM RATINGS
AV DD to GND............................................................-0.3V to +6V
DV DD to AV DD .......................................................-0.3V to +0.3V
Digital Inputs/Outputs to GND .................-0.3V to (DV DD + 0.3V)
X+, Y+, X-, Y-, AUX1, AUX2,
and REF to GND ..................................-0.3V to (AV DD + 0.3V)
BAT1, BAT2 to GND .................................................-0.3V to +6V
Maximum ESD per IEC 1000-4-2 (per MIL STD-883 HBM)
X+, X-, Y+, Y-, AUX1, AUX2, BAT1, BAT2...................... ± 15kV
All Other Pins..................................................................... ± 2.5kV
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T A = +70 ° C)
28-Pin QFN (derate 28.5mW/ ° C above +70 ° C) .................2W
28-Pin TQFN (derate 28.5mW/ ° C above +70 ° C) ...............2W
Operating Temperature Range ...........................-40 ° C to +85 ° C
Storage Temperature Range .............................-60 ° C to +150 ° C
Lead Temperature (soldering, 10s) .................................+300 ° C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(DV DD = AV DD = +2.7V to +3.6V (MAX1233), DV DD = AV DD = +4.75V to +5.25V (MAX1234), external reference V REF = 2.5V
(MAX1233), V REF = 4.096V (MAX1234); f SCLK = 10MHz, f SAMPLE = 50ksps, 12-bit mode, 0.1μF capacitor at REF, T A = -40 ° C to
+85°C, unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG-TO-DIGITAL CONVERTER
DC ACCURACY (Note 1)
Resolution
No Missing Codes
Software-programmable 8/10/12 bit
11
12
Bits
Bits
Relative Accuracy (Note 2)
Differential Nonlinearity
Offset Error
INL
DNL
12-bit mode
10-bit and 8-bit modes
12-bit mode
10-bit and 8-bit modes
12-bit mode
10-bit and 8-bit modes
± 0.8
± 0.5
± 0.8
± 0.5
± 0.5
± 0.5
± 2
± 2
± 4
LSB
LSB
LSB
12-bit mode
± 0.5
± 4
Gain Error (Note 3)
10-bit mode
8-bit mode
± 0.5
± 0.5
LSB
Total Unadjusted Error
Offset Temperature Coefficient
Gain Temperature Coefficient
Channel-to-Channel Offset
Channel-to-Channel Gain
Matching
Noise
TUE
12-bit mode
10-bit and 8-bit modes
Including internal V REF
± 2
± 1
± 0.4
± 0.4
± 0.1
± 0.1
50
LSB
ppm/ ° C
ppm/ ° C
LSB
LSB
μV RMS
Power-Supply Rejection
PSR
Full-scale
input
MAX1233
AV DD = DV DD = +2.7V to +3.6V
MAX1234
AV DD = DV DD = +5V ± 5%
± 0.4
± 0.3
mV
DYNAMIC SPECIFICATIONS (1kHz SINE WAVE, V IN = 2.5V P-P FOR MAX1233, V IN = 4.096V P-P FOR MAX1234, 50ksps,
f SCLK = 10MHz)
Signal-to-Noise Plus Distortion
SINAD
69
dB
2
_______________________________________________________________________________________
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