Wide temperature range: -45°C to 130°C
Wide supply voltage range: 2.7V to 5.5V
P17-22R
Wide supply voltage range: 2.7V to 5.5V
P17-22R
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سنسور دما SMT172
مشخصات فنی
Features and Highlights
World’s most energy efficient temperature sensor
0.36μJ/measurement (TA=25°C, 3.3V)
Wide temperature range: -45°C to 130°C
Wide supply voltage range: 2.7V to 5.5V
High accuracy: ±0.25°C (-10°C to 100°C TO18)
±0.1°C (-20°C to 60°C, TO18)
Extreme low noise: 0.0002°C
Ultra-low current (60μA active or 220nA average)
Excellent long term stability
Direct interface with Microcontroller (MCU)
Wide range of package option
Application
Ultra-low power applications: wearable electronics, wireless sensor networks
Medical applications: body temperature monitoring Instrumentation: (Bio)chemical analysis, precision equipment Environmental monitoring (indoor/outdoor)
Industrial applications: process monitoring/controlling
Introduction
The SMT172 is an ultra-low power, high-precision temperature sensor that combines the ease of use with the world’s leading performance over a wide temperature range. Using the most recent advances in the silicon
temperature sensing technology, the SMT172 has applied some really sophisticated IC design techniques as well as high-precision calibration methods, to achieve an absolute inaccuracy of less than ±0.1°C in the range of - 20°C to 60°C
The SMT172 operates with a supply voltage from 2.7V to 5.5V. The typical active current of only 60μA, the high speed conversion over 4000 outputs per second (at room temperature) and an extremely low noise makes this
sensor the most energy efficient temperature sensor in the world (0.36μJ/measurement).
The SMT172 has a pulse width modulated (PWM) output signal, where the duty cycle is proportional to the measured temperature. This makes it possible that the sensor can directly interface to a MCU without using an
Analog-to-Digital Converter (ADC). Today, the hardware Timer in a MCU to read our PWM signal has become available almost universally, fast in speed and low in cost. Therefore, it is extremely easy for any user to get started with this sensor and achieve a very quick time to market.
