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MAX1271ACAI Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX1271ACAI Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 20 page Multirange, +5V, 8-Channel, Serial 12-Bit ADCs 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (continued) (VDD = +5.0V ±5%; unipolar/bipolar range; external reference mode, VREF = +4.096V; 4.7µF at REF; external clock; fCLK = 2.0MHz, 50% duty cycle (MAX127_B); fCLK = 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INTERNAL REFERENCE REF Output Voltage VREF TA = +25°C 4.076 4.096 4.116 V MAX1270_C/MAX1271_C ±15 REF Output Tempco TC VREF MAX1270_E/MAX1271_E ±30 ppm/ °C Output Short-Circuit Current 30 mA Load Regulation 0 to 0.5mA output current (Note 5) 10 mV Capacitive Bypass at REF 4.7 µF Capacitive Bypass at REFADJ 0.01 µF REFADJ Output Voltage 2.465 2.500 2.535 V REFADJ Adjustment Range Figure 1 ±1.5 % Buffer Voltage Gain 1.638 V/V REFERENCE INPUT (Reference buffer disabled, reference input applied to REF) Input Voltage Range 2.40 4.18 V Normal or STBYPD 400 Input Current VREF = 4.18V FULLPD 1 µA Normal or STBYPD 10 k Ω Input Resistance VREF = 4.18V FULLPD 4.18 M Ω REFADJ Threshold for Buffer Disable VDD - 0.5 V POWER REQUIREMENT Supply Voltage VDD 4.75 5.25 V Bipolar range 18 Normal Unipolar range 6 10 mA STBYPD power-down mode (Note 6) 700 850 Supply Current IDD FULLPD power-down mode 120 220 µA External reference = 4.096V ±0.1 ±0.5 Power-Supply Rejection Ratio (Note 7) PSRR Internal reference ±0.5 LSB TIMING MAX127_A 0.1 1.8 External Clock Frequency Range fSCLK MAX127_B 0.1 2.0 MHz MAX127_A 3.3 External clock mode (Note 8) MAX127_B 3.0 Acquisition Phase Internal clock mode, Figure 9 3 5 µs |
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