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MAX149BCAP Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX149BCAP Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 24 page +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs _______________________________________________________________________________________ 3 Multiplexer Leakage Current µA 0.01 10 Shutdown VREF Input Current k Ω 18 25 VREF Input Resistance µA 100 150 VREF Input Current V 1.0 VDD + 50mV VREF Input Voltage Range (Note 9) pF 16 Input Capacitance 1.8 MHz 0.225 Internal Clock Frequency µA ±0.01 ±1 UNITS MIN TYP MAX SYMBOL PARAMETER SHDN = FLOAT VREF = 2.500V SHDN = VDD On/off leakage current, VCH_ = 0V or VDD CONDITIONS ELECTRICAL CHARACTERISTICS (continued) VDD = +2.7V to +5.25V; COM = 0V; fSCLK = 2.0MHz; external clock (50% duty cycle); 15 clocks/conversion cycle (133ksps); MAX149—4.7µF capacitor at VREF pin; MAX148—external reference, VREF = 2.500 V applied to VREF pin; TA = TMIN to TMAX; unless otherwise noted.) V 2.470 2.500 2.530 VREF Output Voltage TA = +25°C (Note 7) mA 30 VREF Short-Circuit Current ±30 MAX149 mV 0.35 Load Regulation (Note 8) 0mA to 0.2mA output load 0 Internal compensation mode µF 4.7 Capacitive Bypass at VREF External compensation mode µF 0.01 Capacitive Bypass at REFADJ % ±1.5 REFADJ Adjustment Range V VDD - 0.5 REFADJ Buffer-Disable Threshold µF 0 Capacitive Bypass at VREF Internal compensation mode 2.00 V/V 2.06 Reference Buffer Gain 4.7 MAX148 MAX149 External compensation mode ±10 µA ±50 REFADJ Input Current MAX148 MAX149 ppm/°C VREF Temperature Coefficient 0 to VREF V ±VREF / 2 Input Voltage Range, Single- Ended and Differential (Note 6) Unipolar, COM = 0V Bipolar, COM = VREF / 2 0.1 2.0 MHz 0 2.0 External Clock Frequency Data transfer only CONVERSION RATE (continued) ANALOG/COM INPUTS INTERNAL REFERENCE (MAX149 only, reference buffer enabled) EXTERNAL REFERENCE AT VREF (Buffer disabled) EXTERNAL REFERENCE AT REFADJ |
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