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MAX1233 Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX1233 Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 45 page ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller ______________________________________________________________________________________ 11 Typical Operating Characteristics (continued) (AVDD = DVDD = 3V (MAX1233) or 5V (MAX1234), external VREF = +2.5V (MAX1233), external VREF = +4.096V (MAX1234), fSCLK = 10MHz (50% duty cycle), fSAMPLE = 20ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.) ADC REFERENCE SUPPLY CURRENT vs. ANALOG SUPPLY VOLTAGE AVDD (V) 4.7 4.2 3.7 3.2 600 650 700 750 550 2.7 5.2 REFERENCE SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE ( °C) 600 650 700 750 550 80 65 -25 -10 5 35 20 50 -40 PIN NAME FUNCTION 1DVDD Positive Digital Supply Voltage, +2.7V to +3.6V for MAX1233, +4.75V to +5.25V for MAX1234. Bypass with a 0.1µF capacitor. Must be within 300mV of AVDD. 2AVDD Positive Analog Supply Voltage, +2.7V to +3.6V for MAX1233, +4.75V to +5.25V for MAX1234. Bypass with a 0.1µF capacitor. Must be within 300mV of DVDD. 3* X+ X+ Position Input 4* Y+ Y+ Position Input 5* X- X- Position Input 6* Y- Y- Position Input 7 GND Analog and Digital Ground 8* BAT1 Battery Monitoring Input 1. Measures battery voltages up to 6V. 9* BAT2 Battery Monitoring Input 2. Measures battery voltages up to 6V. 10* AUX1 Auxiliary Analog Input 1 to ADC. Measures analog voltages from zero to VREF. 11* AUX2 Auxiliary Analog Input 2 to ADC. Measures analog voltages from zero to VREF. 12 REF Voltage Reference Output/Input. Reference voltage for analog-to-digital conversion. In internal reference mode, the reference buffer provides a 2.5V or 1.0V nominal output. In external reference mode, apply a reference voltage between 1.0V and AVDD. Bypass REF to GND with a 0.1µF capacitor in the external reference mode only. 13 DACOUT DAC Voltage Output; 0.9 × AVDD Full Scale 14 R4 Keypad Row 4. Can be reconfigured as GPIO3. 15 R3 Keypad Row 3. Can be reconfigured as GPIO2. 16 R2 Keypad Row 2. Can be reconfigured as GPIO1. 17 R1 Keypad Row 1. Can be reconfigured as GPIO0. 18 C1 Keypad Column 1. Can be reconfigured as GPIO4. Pin Description |
Similar Part No. - MAX1233_05 |
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Similar Description - MAX1233_05 |
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