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MAX1234 Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX1234 Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 44 page ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller _______________________________________________________________________________________ 5 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 SYMBOL CONDITIONS MIN TYP MAX UNITS Input Capacitance CIN 15 pF DIGITAL OUTPUT (DOUT) ISINK = 2mA 0.4 Output Voltage Low VOL ISINK = 4mA 0.8 V Output Voltage High VOH ISOURCE = 1.5mA DVDD - 0.5 V DIGITAL OUTPUT ( BUSY, PENIRQ, KEYIRQ, R_, C_) Output Voltage Low VOL ISINK = 0.2mA 0.4 V Output Voltage High VOH ISOURCE = 0.2mA DVDD - 0.5 V POWER REQUIREMENTS MAX1233 2.7 3 3.6 Supply Voltage (Note 12) AVDD / DVDD MAX1234 4.75 5 5.25 V Idle; all blocks shut down 0.5 5 Only ADC on; fSAMPLE = 20ksps 150 500 Only DAC on; no load 150 230 Analog and Digital Supply Current IAVDD + IDVDD Only internal reference on 670 900 µA TIMING CHARACTERISTICS SCLK Clock Period tCP 100 ns SCLK Pulse Width High tCH 40 ns SCLK Pulse Width Low tCL 40 ns DIN to SCLK Rise Setup tDS 40 ns SCLK Rise to DIN Hold tDH 0ns SCLK Fall to DOUT Valid tDOV CLOAD = 50pF 40 ns CS Fall to DOUT Enabled tDV CLOAD = 50pF 45 ns CS Rise to DOUT Disabled tDOD CLOAD = 50pF 40 ns CS Fall to SCLK Rise tCSS 40 ns CS Fall to SCLK Ignored tCSH 0ns SCLK Rise to R_/C_ Data Valid tGPO CLOAD = 50pF (Note 13) 230 ns CS Pulse Width High tCSW 40 ns Note 1: Tested at DVDD = AVDD = +2.7V (MAX1233), DVDD = AVDD = +5V (MAX1234). Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the offset and gain errors have been removed. Note 3: Offset nulled. Note 4: Difference between TEMP1 and TEMP2; temperature in °K = (VTEMP2 - VTEMP1) × 2680°K/V. No calibration is necessary. Note 5: Temperature coefficient is -2.1mV/°C. Determine absolute temperature by extrapolating from a calibrated value. Note 6: ADC performance is limited by the conversion noise floor, typically 300µVP-P. An external reference below 2.5V can compromise the ADC performance. Note 7: Guaranteed from code 5 to 255. |
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Similar Description - MAX1234 |
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