LM73-Q1

具有两线制接口的 11 至 14 位数字温度传感器 6-SOT-23-THIN -40 to 125

The is a digital output temperature sensor featuring an integrated incremental Delta-Sigma ADC. The LM73-Q1 communicates with a two-wire interface that is compatible with SMBus and I2C interfaces, and the host can query the LM73-Q1 at any time to read temperature.

The LM73-Q1 operates over a wide temperature range –40°C to 125°C and provides ±1.45°C accuracy from –10°C to 80°C. The LM73-Q1 includes four selectable resolution options that allow the temperature conversion time and sensitivity to be adjusted for optimal performance. The LM73-Q1 defaults to 11-bit mode 0.25°C/LSB, and will measure temperature in a maximum time of 14 ms, making it ideal for applications that require temperature data very soon after power-up. In its 14-bit maximum resolution mode 0.03125°C/LSB, the LM73-Q1 is optimized to sense very small changes in temperature.

A single multi-level address line selects one of three unique device addresses. An open-drain ALERT output goes active when the temperature exceeds a programmable limit. Both the data and clock lines are filtered for excellent noise tolerance and reliable communication. Additionally, the LM73-Q1 has a time-out feature that will automatically reset the clock and data lines, if these lines are held low for an extended period of time. This prevents a bus lock-up condition without requiring host processor intervention.

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Qualified for Automotive Applications

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AEC-Q100 Qualified With the Following Results

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LM73-Q1 Temperature grade 1: –40°C to 125°C

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LM73-Q1 HBM ESD Classification Level 2

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LM73-Q1 CDM ESD Classification Level C6

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Single Address Pin Offers Choice of Three Selectable Addresses Per Version for a Total of Six Possible Addresses.

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SMBus and I2C-compatible Two-Wire Interface

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Supports 400-kHz Operation

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Shutdown Mode With One-shot Feature Available for Very Low Average Power Consumption

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Programmable Digital Temperature Resolution From 11 Bits to 14 Bits

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Fast Conversion Rate Ideal for Quick Power Up and Measuring Rapidly Changing Temperature

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Open-Drain ALERT Output Pin Goes Active When Temperature is Above a Programmed Temperature Limit

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Very Stable, Low-noise Digital Output

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UL Recognized Component

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Temperature Accuracy: ±1.45°C Maximum

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Temperature Range: –40°C to 125°C

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Conversion Time

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11-Bit 0.25°C: 14 ms Maximum

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14-Bit 0.03125°C: 112 ms Maximum

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Operating Supply Current: 320 µA Typical

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Shutdown Supply Current: 1.9 µA Typical

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Resolution: 0.25°C to 0.03125°C