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MAX1238LEEE Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX1238LEEE Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 22 page 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VDD = 2.7V to 3.6V (MAX1237/MAX1239), VDD = 4.5V to 5.5V (MAX1236/MAX1238), VREF = 2.048V (MAX1237/MAX1239), VREF = 4.096V (MAX1236/MAX1238), CREF = 0.1µF, fSCL = 1.7MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C, see Tables 1–5 for programming notation.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Internal clock, SCAN[1:0] = 01 51 Internal clock, SCAN[1:0] = 00 CS[3:0] = 1011 (MAX1238/MAX1239) 51 Throughput Rate fSAMPLE External clock 94.4 ksps Track/Hold Acquisition Time 800 ns Internal Clock Frequency 2.8 MHz External clock, fast mode 60 Aperture Delay (Note 5) tAD External clock, high-speed mode 30 ns ANALOG INPUT (AIN0–AIN11) Unipolar 0 VREF Input-Voltage Range, Single- Ended and Differential (Note 6) Bipolar 0 ±VREF/2 V Input Multiplexer Leakage Current ON/OFF leakage current, VAIN_ = 0 or VDD ±0.01 ±1µA Input Capacitance CIN 22 pF INTERNAL REFERENCE (Note 7) MAX1237/MAX1239 1.968 2.048 2.128 Reference Voltage VREF TA = +25°C MAX1236/MAX1238 3.936 4.096 4.256 V Reference-Voltage Temperature Coefficient TCVREF 25 ppm/ °C REF Short-Circuit Current 2mA REF Source Impedance 1.5 k Ω EXTERNAL REFERENCE REF Input-Voltage Range VREF (Note 8) 1 VDD V REF Input Current IREF fSAMPLE = 94.4ksps 40 µA DIGITAL INPUTS/OUTPUTS (SCL, SDA) Input-High Voltage VIH 0.7 ✕ VDD V Input-Low Voltage VIL 0.3 ✕ VDD V Input Hysteresis VHYST 0.1 ✕ VDD V Input Current IIN VIN = 0 to VDD ±10 µA Input Capacitance CIN 15 pF Output Low Voltage VOL ISINK = 3mA 0.4 V |
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