LM73-Q1 Series

11- to 14-Bit Digital Temperature Sensor With 2-Wire Interface

Catalog

11- to 14-Bit Digital Temperature Sensor With 2-Wire Interface

Part	Test Condition	Grade	Operating Temperature [Max]	Operating Temperature [Min]	Features	Package / Case	Output Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Accuracy - Highest (Lowest)	Accuracy - Highest (Lowest)	Mounting Type	Qualification	Sensor Type	Supplier Device Package	Resolution	Sensing Temperature - Local [Max]	Sensing Temperature - Local [Min]	Test Condition	Accuracy - Highest (Lowest) [Max]	Accuracy - Highest (Lowest) [Min]
Texas Instruments LM73C0QDDCRQ1	25 °C	Automotive	125 °C	-40 °C	One-Shot Shutdown Mode	SOT-23-6 Thin TSOT-23-6	I2C/SMBus	2.7 V	5.5 V	1.5 ¯C	2 °C	Surface Mount	AEC-Q100	Digital Local	SOT-23-THIN	14 b	125 °C	-40 °C
Texas Instruments LM73CIMKX-1/NOPB						SOT-23-6 Thin TSOT-23-6	I2C/SMBus	2.7 V	5.5 V			Surface Mount		Digital Local	TSOT-23-6	13 b	150 °C	-40 °C	-10°C ~ 80°C -40°C ~ 150°C	1.5 °C	2.5 °C
Texas Instruments LM73CIMK-1/NOPB						SOT-23-6 Thin TSOT-23-6	I2C/SMBus	2.7 V	5.5 V			Surface Mount		Digital Local	TSOT-23-6	13 b	150 °C	-40 °C	-10°C ~ 80°C -40°C ~ 150°C	1.5 °C	2.5 °C
Texas Instruments LM73C1QDDCRQ1	25 °C	Automotive	125 °C	-40 °C	One-Shot Shutdown Mode	SOT-23-6 Thin TSOT-23-6	I2C	2.7 V	5.5 V	1.7 °C 2.2 °C		Surface Mount	AEC-Q100	Digital Local	SOT-23-THIN	14 b	60 °C	-10 °C

Catalog

11- to 14-Bit Digital Temperature Sensor With 2-Wire Interface

Key Features

• Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following ResultsLM73-Q1 Temperature grade 1: –40°C to 125°CLM73-Q1 HBM ESD Classification Level 2LM73-Q1 CDM ESD Classification Level C6Single Address Pin Offers Choice of Three Selectable Addresses Per Version for a Total of Six Possible Addresses.SMBus and I2C-compatible Two-Wire InterfaceSupports 400-kHz OperationShutdown Mode With One-shot Feature Available for Very Low Average Power ConsumptionProgrammable Digital Temperature Resolution From 11 Bits to 14 BitsFast Conversion Rate Ideal for Quick Power Up and Measuring Rapidly Changing TemperatureOpen-DrainALERTOutput Pin Goes Active When Temperature is Above a Programmed Temperature LimitVery Stable, Low-noise Digital OutputUL Recognized ComponentTemperature Accuracy: ±1.45°C (Maximum)Temperature Range: –40°C to 125°CConversion Time11-Bit (0.25°C): 14 ms (Maximum)14-Bit (0.03125°C): 112 ms (Maximum)Operating Supply Current: 320 µA (Typical)Shutdown Supply Current: 1.9 µA (Typical)Resolution: 0.25°C to 0.03125°CQualified for Automotive ApplicationsAEC-Q100 Qualified With the Following ResultsLM73-Q1 Temperature grade 1: –40°C to 125°CLM73-Q1 HBM ESD Classification Level 2LM73-Q1 CDM ESD Classification Level C6Single Address Pin Offers Choice of Three Selectable Addresses Per Version for a Total of Six Possible Addresses.SMBus and I2C-compatible Two-Wire InterfaceSupports 400-kHz OperationShutdown Mode With One-shot Feature Available for Very Low Average Power ConsumptionProgrammable Digital Temperature Resolution From 11 Bits to 14 BitsFast Conversion Rate Ideal for Quick Power Up and Measuring Rapidly Changing TemperatureOpen-DrainALERTOutput Pin Goes Active When Temperature is Above a Programmed Temperature LimitVery Stable, Low-noise Digital OutputUL Recognized ComponentTemperature Accuracy: ±1.45°C (Maximum)Temperature Range: –40°C to 125°CConversion Time11-Bit (0.25°C): 14 ms (Maximum)14-Bit (0.03125°C): 112 ms (Maximum)Operating Supply Current: 320 µA (Typical)Shutdown Supply Current: 1.9 µA (Typical)Resolution: 0.25°C to 0.03125°C

Description

The LM73 is an integrated, digital-output temperature sensor featuring an incremental Delta-Sigma ADC with a two-wire interface that is compatible with the SMBus and I2C interfaces. The host can query the LM73 at any time to read temperature. Available in a 6-pin SOT package, the LM73 occupies very little board area while operating over a wide temperature range (–40°C to 150°C) and providing ±1°C accuracy from –10°C to 80°C. The user can optimize between the conversion time and the sensitivity of the LM73 by programming it to report temperature in any of four different resolutions. Defaulting to 11-bit mode (0.25°C/LSB), the LM73 measures temperature in a maximum time of 14 ms, making it ideal for applications that require temperature data very soon after power-up. In its maximum resolution, 14-bit mode (0.03125°C/LSB), the LM73 is optimized to sense very small changes in temperature. A single multi-level address line selects one of three unique device addresses. An open-drainALERToutput 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, a time-out feature on the clock and data lines causes the LM73 to automatically reset these lines if either is held low for an extended time, thus exiting any bus lock-up condition without processor intervention. The LM73 is an integrated, digital-output temperature sensor featuring an incremental Delta-Sigma ADC with a two-wire interface that is compatible with the SMBus and I2C interfaces. The host can query the LM73 at any time to read temperature. Available in a 6-pin SOT package, the LM73 occupies very little board area while operating over a wide temperature range (–40°C to 150°C) and providing ±1°C accuracy from –10°C to 80°C. The user can optimize between the conversion time and the sensitivity of the LM73 by programming it to report temperature in any of four different resolutions. Defaulting to 11-bit mode (0.25°C/LSB), the LM73 measures temperature in a maximum time of 14 ms, making it ideal for applications that require temperature data very soon after power-up. In its maximum resolution, 14-bit mode (0.03125°C/LSB), the LM73 is optimized to sense very small changes in temperature. A single multi-level address line selects one of three unique device addresses. An open-drainALERToutput 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, a time-out feature on the clock and data lines causes the LM73 to automatically reset these lines if either is held low for an extended time, thus exiting any bus lock-up condition without processor intervention.