LM57CISD-10

• The trip temperature is set by an external resistor
• The tolerances of the external resistors help zero errors
• Push-pull and open-drain temperature switch outputs
• Wide operating and trip temperature range from -50 °C to 150 °C
• Very linear_mockV temperature temperature sensor output
• Analog and digital output short-circuit protection
• TRIP - The TEST pin allows testing in the system
• Digital output latching function
• Very small 2.5mm 2.5mm 8-pin LLP package

illustrate

The LM57 is a precision integrated analog temperature sensor, temperature switch, dual output. Trip temperature (T_Trip) is programmable by using two external 1% resistors. Using a very small package resistance (0.5 mm x 1 mm), the LM57 can be programmed to any temperature of 256 while consuming very little board space. V_temperatureThe output provides an analog output voltage proportional to the temperature measured with a negative temperature coefficient (NTC).

Built-in temperature hysteresis (T_HYST）The output is stable in a thermally oscillating environment. The digital temperature switching output will go when the die temperature exceeds T_Trip, will be released when the temperature falls below a certain temperature equal to T_TripMinus T_HYSTDecline. Digital output, a ton_above, is a high effective push-pull structure. ^ TOVER, other digital outputs, active low, open-drain structure.

A high driving trip test input will make a digital output. A processor can read the logic level of the temperature switch output, confirming that they have changed their positive state. This allows for in-situ verification, comparison and output circuit functionality after system assembly. When the stroke TEST pin is high, the skip reference voltage appears at the VTEMP pin. The system can calibrate the sensor with this voltage with tighter accuracy. Strapping_ToThe trip test T outputs the latch to the next person. It can clear LM57 that forces the trip test low or closed.

Since it consumes only 28 μA of its maximum supply, it has very low self-heating, about 0.02 ° C, still air.

Main specifications

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• cell phone
• Wireless transceivers
• Digital cameras
• Personal Digital Assistant (PDA)
• Battery management
• Car
• disk drive
• Game
• household appliance