LM27A

LM27A SOT-23, ±3°C Accurate, 120°C-150°C Factory Preset Thermostat (LM27 in Die Form) July 2007 LM27A ±3°C Accurate, 120°C-150°C Factory Preset Thermostat (LM27 in Die Form) General Description This datasheet applies to the LM27A, which is the die form of the LM27. The LM27 is available in the SOT23-5 package. Please refer to the LM27 datasheet for detailed specifications pertaining to the packaged part. The LM27A is a precision, single digital-output, low-power thermostat comprised of an internal reference, DAC, temperature sensor and comparator. Utilizing factory programming, it can be manufactured with different trip points as well as different digital output functionality. The trip point (TOS) can be preset at the factory to any temperature in the range of +120°C to +150°C in 1°C increments. The LM27A has two digital output pads, one digital input (HYST) and one analog output (VTEMP). One digitial output is an active-high, push-pull output and the other is an active-low, open-drain output. Either of the outputs (but not both) are available. The LM27A is available in either an overtemperature shutdown or an undertemperature shutdown option. An LM27A with overtemperature shutdown is configured so that its thermostat outputs (OS and OS) will go active when a rising temperature crosses the trip point and the hysteresis will apply to a falling temperature. The thermostat outputs of an LM27A with an undertemperature shutdown (US and US) will trip on a falling temperature and...