LM57CISDX-5

• Trip temperature set by external resistor
• The tolerance of the external resistor contributes to zero error
• Push-pull and open-drain temperature switch outputs
• Wide operating temperature and trip temperature range of -50°C to 150°C
• Very linear analog V temperature temperature sensor output
• Analog and digital output short-circuit protection
• The TRIP-TEST pin allows for testing on the system
• Digital output latching function
• Very small 2.5 mm 2.5 mm 8-pin LLP package

illustrate

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

Built-in temperature hysteresis (T HYST) thermal oscillation to keep the output stable. The digital temperature switch output will go when the die temperature exceeds T trip, and will release when the temperature is lower than a certain temperature is equal to T tripping minus T HYST drop. The digital output, more than one ton, is a highly effective push-pull structure. ^ TOVER, Other Digital Outputs, Low Active Active, Open Drain Construction.

The driving stroke test input high will make the digital output. A processor can read the logic level output by the temperature switch, confirming that they change their positive state. This allows for in-situ verification, comparison, and output of circuit functionality after system assembly. When the TEST pin is high, the step-skipping reference voltage appears on the VTEMP pin. The system can use this voltage to calibrate the sensor more tightly. The bundling is handed over to the trip test T to output the latch after the number of people. It can clear LM57 that forces tripping tests low or closed.

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

Key specifications:

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