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The LM73-Q1 is a digital output temperature sensor with an integrated incremental Δ-Σ ADC. The LM73-Q1 communicates via a two-wire interface compatible with SMBus and I 2C interfaces, allowing the host computer to query the LM73-Q1 at any time to read the temperature. 

The LM73-Q1 can operate over a wide temperature range (-40°C to 125°C) with an accuracy of ±1.45° C over the temperature range of -10°C to 80°C. The LM73-Q1 includes four selectable resolution options that can be used to adjust the temperature transition time and sensitivity for optimum performance. mode (0.25°C/LSB), which measures temperature within a maximum time of 14ms, making it ideal for applications where temperature data needs to be acquired quickly after power-up. In the highest resolution 14-bit mode (0.03125°C/LSB), the LM73-Q1 is optimised to sense very small temperature changes.

Features

- Suitable for automotive electronics applications

- With the following results in accordance with AEC-Q100

- LM73-Q1 temperature class 1: -40°C to 125°C

- LM73-Q1 Beyond Human Body Model (HBM) Electrostatic Discharge (ESD) classification class 2

- LM73-Q1 Charged Device Model (CDM) ESD classification class C6

- Any of the three selectable addresses can be selected for each version via an address pin, for a total of 6 available addresses.

- SMBus and I2C compatible 2-wire interface

- 400kHz operating frequency support

- Shutdown mode with single trigger function for very low average power consumption

- Programmable digital temperature resolution of 11 to 14 bits

- Fast conversion rates for fast power-up and measuring fast charging temperatures

- Open-drain ALERT output pin activates when temperature exceeds programmed temperature limits

- Very stable, low noise digital output

- UL listed device

- Temperature accuracy: ±1.45°C (max)

- Temperature range: -40°C to 125°C

- Conversion time

- 11-bit (0.25°C): 14ms (max)

- 14 bit (0.03125°C): 112ms (max)

- Operating supply current: 320µA (typical)

- Off-supply current: 1.9µA (typical)

- Resolution: 0.25°C to 0.03125°C

Applications

- Automotive air conditioning

- Advanced Driver Assistance Systems (ADAS)

- Air flow sensors

- Infotainment processor management

- Instrument panel systems

- UREA Sensors

- HID lights

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