MAX1233 MAX1234 MAX1233EGI MAX1234EGI MAX1233/MAX1234 STD-883 096VP-P

KIT ATION EVALU ABLE AVAIL ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller Applications

19-2512; Rev 1; 9/03 KIT ATION EVALU ABLE AVAIL ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller Applications Features o ESD-Protected Analog Inputs ±15kV IEC 1000-4-2 Air-Gap Discharge ±8kV IEC 1000-4-2 Contact Discharge o Single-Supply Operation +2.7V to +3.6V (MAX1233 MAX1233) +4.75V to +5.25V (MAX1234 MAX1234) o 4-Wire Touch-Screen Interface o Internal +1.0V/+2.5V Reference or External Reference (+1.0V to AVDD) o SPITM/QSPITM/MICROWIRETM-Compatible 10MHz Serial Interface o 12-Bit, 50ksps ADC Measures Resistive Touch-Screen Position and Pressure Two Auxiliary Analog Inputs Two Battery Voltages (0.5V to 6V) On-Chip Temperature o 8-Bit DAC for LCD Bias Control o 4 × 4 Keypad Programmable Controller Offers Up to Eight GPIO Pins o Automatic Detection of Screen Touch, Key Press, and End of Conversion Personal Digital Assistants Pagers Touch-Screen Monitors o Programmable 8-, 10-, 12-Bit Resolution Cellular Phones o Programmable Conversion Rates MP3 Players o AutoShutdownTM Between Conversions Portable Instruments o Low Power 260µA at 50ksps 50µA at 10ksps 6µA at 1ksps 0.3µA Shutdown Current Point-of-Sale Terminals CS SCLK DIN BUSY DOUT PENIRQ KEYIRQ 28 27 26 25 24 23 22 Pin Configuration TOP VIEW o 28-Pin 5mm × 5mm QFN Package DVDD 1 21 AVDD 2 20 C3 *X+ 3 19 C2 Ordering Information C4 15 R3 R4 DACOUT REF *BAT1 14 R2 7 *AUX2 GND 13 16 12 R1 6 *AUX1 *Y- 11 C1 17 10 18 9 5 8 4 *X- *BAT2 *Y+ MAX1233 MAX1233 MAX1234 MAX1234 QFN *PIN INCLUDES 8kV/15kV ESD PROTECTION. TEMP RANGE PIN-PACKAGE MAX1233EGI MAX1233EGI PART -40°C to +85°C 28 QFN (5mm × 5mm) MAX1234EGI MAX1234EGI -40°C to +85°C 28 QFN (5mm × 5mm) TransZorb is a trademark of General Semiconductor Industries, Inc. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. AutoShutdown is a trademark of Maxim Integrated Products, Inc. _ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX1233/MAX1234 MAX1233/MAX1234 General Description The MAX1233/MAX1234 MAX1233/MAX1234 are complete PDA controllers in a 5mm × 5mm, 28-pin QFN package. They feature a 12-bit analog-to-digital converter (ADC), low on-resistance switches for driving resistive touch screens, an internal +1.0V/+2.5V or external reference, ±2°C accurate, on-chip temperature sensor, direct +6V battery monitor, keypad controller, 8-bit digital-to-analog converter (DAC), and a synchronous serial interface. Each of the keypad controllers' eight row and column inputs can be reconfigured as general-purpose parallel I/O pins (GPIO). All analog inputs are fully ESD protected, eliminating the need for external TransZorbTM devices. The MAX1233/MAX1234 MAX1233/MAX1234 offer programmable resolution and sampling rates. Interrupts from the devices alert the host processor when data is ready, when the screen is touched, or a key press is detected. Softwareconfigurable scan control and internal timers give the user flexibility without burdening the host processor. These devices consume only 260µA at the maximum sampling rate of 50ksps. Supply current falls to below 50µA for sampling rates of 10ksps. The MAX1233/MAX1234 MAX1233/MAX1234 are guaranteed over the -40°C to +85°C temperature range. MAX1233/MAX1234 MAX1233/MAX1234 ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller ABSOLUTE MAXIMUM RATINGS AVDD to GND.-0.3V to +6V DVDD to AVDD .-0.3V to +0.3V Digital Inputs/Outputs to GND .-0.3V to (DVDD + 0.3V) X+, Y+, X-, Y-, AUX1, AUX2, and REF to GND .-0.3V to (AVDD + 0.3V) BAT1, BAT2 to GND .-0.3V to +6V Maximum ESD per IEC 1000-4-2 (per MIL STD-883 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 (TA = +70°C) 28-Pin QFN (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 (DVDD = AVDD = +2.7V to +3.6V (MAX1233 MAX1233), DVDD = AVDD = +4.75V to +5.25V (MAX1234 MAX1234), external reference VREF = 2.5V (MAX1233 MAX1233), VREF = 4.096V (MAX1234 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 SYMBOL CONDITIONS MIN TYP MAX UNITS 12 Bits ANALOG-TO-DIGITAL CONVERTER DC ACCURACY (Note 1) Resolution Software-programmable 8/10/12 bit No Missing Codes 11 Relative Accuracy (Note 2) INL Differential Nonlinearity DNL Bits 12-bit mode ±0.8 10-bit and 8-bit modes ±0.5 ±0.5 10-bit mode ±0.5 8-bit mode TUE ±0.5 12-bit mode Total Unadjusted Error ±0.5 10-bit and 8-bit modes Gain Error (Note 3) ±0.8 ±0.5 12-bit mode Offset Error 12-bit mode 10-bit and 8-bit modes ±2 ±0.5 12-bit mode ±4 LSB LSB ±4 ±2 10-bit and 8-bit modes ±2 LSB ±1 LSB LSB Offset Temperature Coefficient ±0.4 ppm/°C Gain Temperature Coefficient ±0.4 ppm/°C Channel-to-Channel Offset ±0.1 LSB Channel-to-Channel Gain Matching ±0.1 LSB 50 µVRMS Noise Including internal VREF Power-Supply Rejection Full-scale input PSR MAX1233 MAX1233 AVDD = DVDD = +2.7V to +3.6V ±0.4 MAX1234 MAX1234 AVDD = DVDD = +5V ±5% ±0.3 mV DYNAMIC SPECIFICATIONS (1kHz SINE WAVE, VIN = 2.5VP-P FOR MAX1233 MAX1233, VIN = 4.096VP-P 096VP-P FOR MAX1234 MAX1234, 50ksps, fSCLK = 10MHz) Signal-to-Noise Plus Distortion 2 SINAD 69 _ dB ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller (DVDD = AVDD = +2.7V to +3.6V (MAX1233 MAX1233), DVDD = AVDD = +4.75V to +5.25V (MAX1234 MAX1234), external reference VREF = 2.5V (MAX1233 MAX1233), VREF = 4.096V (MAX1234 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 SYMBOL CONDITIONS MIN TYP MAX UNITS Total Harmonic Distortion THD -84 dB Spurious-Free Dynamic Range SFDR 84 dB Full-Power Bandwidth -3dB point 0.5 MHz Full-Linear Bandwidth SINAD > 67dB 50 kHz CONVERSION RATE Internal Oscillator Frequency 8 11.5 MHz Aperture Delay 30 ns Aperture Jitter 10k and capacitive loads