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MAX7502MUA Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX7502MUA Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 13 page Digital Temperature Sensors and Thermal Watchdog with Bus Lockup Protection 4 _______________________________________________________________________________________ Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) QUIESCENT SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE ( °C) 95 65 35 5 -25 240 250 260 270 280 290 300 230 -55 125 +VS = +5V +VS = +3V 1 2 3 4 5 6 0 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE ( °C) 95 65 35 5 -25 -55 125 +VS = +5V +VS = +3V ACCURACY vs. TEMPERATURE -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 -2.0 TEMPERATURE ( °C) 95 65 35 5 -25 -55 125 4 TYPICAL PARTS Pin Description PIN MAX7500 MAX7501 MAX7502 NAME FUNCTION 1 1 SDA Serial Data Input/Output Line. Open drain. Connect SDA to a pullup resistor. 2 2 SCL Serial Data Clock Input. Open drain. Connect SCL to a pullup resistor. 3 3 OS Over-Temperature Shutdown Output. Open drain. Connect OS to a pullup resistor. 4 4 GND Ground 5 — A2 2-Wire Interface Address Input. Connect A2 to GND or +VS to set the desired I 2C bus address. Do not leave floating. (See Table 1.) — 5 RESET Active-Low Reset Input. Pull RESET low for longer than the minimum reset pulse width to reset the I 2C bus and all internal registers to their POR values. 66 A1 2-Wire Interface Address Input. Connect A1 to GND or +VS to set the desired I 2C bus address. Do not leave floating. (See Table 1.) 77 A0 2-Wire Interface Address Input. Connect A0 to GND or +VS to set the desired I 2C bus address. Do not leave floating. (See Table 1.) 88 +VS Positive Supply Voltage Input. Bypass to GND with a 0.1µF bypass capacitor. Detailed Description The MAX7500/MAX7501/MAX7502 temperature sen- sors measure temperature, convert the data into digital form using a sigma-delta ADC, and communicate the conversion results through an I2C-compatible 2-wire serial interface. These devices accept standard I2C commands to read the data, set the over-temperature alarm (OS) trip thresholds, and configure other charac- teristics. The MAX7500 features three address select lines (A0, A1, A2) while the MAX7501 and MAX7502 feature two address select lines (A0, A1) and a RESET input. The MAX7500/MAX7501/MAX7502 operate from +3.0V to +5.5V supply voltages of and consume 250µA of supply current. |
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