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MAX1491CNI Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX1491CNI Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 25 page 3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (continued) (AVDD = DVDD = +2.7V to +5.25V, GND = 0, VREF+ - VREF- = 2.048V (external reference), CNEG= 0.1µF. All specifications are TMIN to TMAX, unless otherwise noted. Typical values are at +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY AVDD Voltage AVDD 2.70 5.25 V DVDD Voltage DVDD 2.70 5.25 V Power-Supply Rejection AVDD PSRRA (Note 7) 80 dB Power-Supply Rejection DVDD PSRRD (Note 7) 100 dB AVDD Current IAVDD (Note 8) 660 µA DVDD = 5V 320 DVDD Current IDVDD DVDD = 3.3V 180 µA LCD DRIVER RMS Segment-On Voltage 1.92 x DVDD V RMS Segment-Off Voltage 1 / 3 x DVDD V Display Multiplex Rate 107 Hz LCD Data-Update Rate 2.5 Hz Note 1: Integral nonlinearity is the derivation of the analog values at any code from its theoretical value after nulling the gain error and offset error. Note 2: Offset calibrated. Note 3: Offset nulled. Note 4: The input voltage range for the analog inputs is given with respect to the voltage on the negative input of the differential pair. Note 5: For the range of VAIN+ or VAIN- = -2.2V to +2.2V and VREF+ or VREF- = -2.2V to +2.2V. Note 6: External load must be constant during conversion for specified accuracy. Guaranteed specification of 2mV/mA is a result of production test limitations. Note 7: Measured at DC by changing the power-supply voltage from 2.7V to 5.25V and measuring its effect on the conversion error. PSRR at 50Hz and 60Hz exceeds 120dB with filter notches of 10, 20, 30, 40, 50, or 60 Hz. Note 8: Analog power-supply currents are measured with all digital inputs at either GND or DVDD. Digital power-supply currents measured with all digital inputs at either GND or DVDD. |
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