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LM73CIMK-0/NOPB
2.7V, SOT-23, 11- to 14- Bit Digital Temperature Sensor with 2-Wire Interface
LM73SMBDAT
ADDR 1
VDD = 2.7V to 5.5V
Typical bypass 0.1 PF3
To hardware
shutdown
To / from processor
Address (set as desired for one
of three addresses)
ALERT
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LM73SNIS141F –OCTOBER 2005–REVISED OCTOBER 2015
LM73 2.7-V, SOT-23, 11-to 14-Bit Digital Temperature Sensor With 2-Wire Interface Features 3 DescriptionThe LM73is an integrated, digital-output temperature Single Address Pin Offers Choiceof Three sensor featuring an incremental Delta-Sigma ADCSelectable Addresses Per Version fora Totalof witha two-wire interface thatis compatible with theSix Possible Addresses. SMBus andI2C interfaces. The host can query the• SMBus andI2 C-compatible Two-Wire Interface LM73at any timeto read temperature. Supports 400-Khz Operation Availableina 6-pin SOT package, the LM73 occupies• Shutdown Mode With One-shot Feature Available very little board area while operating overa wide
for Very Low Average Power Consumption temperature range (–40°Cto 150°C) and providing
±1°C accuracy from –10°Cto 80°C. The user can• Programmable Digital Temperature Resolution optimize between the conversion time and theFrom11 Bitsto14 Bits sensitivityof the LM73 by programmingitto report• Fast Conversion Rate Ideal for Quick Power Up temperature in any of four different resolutions.and Measuring Rapidly Changing Temperature Defaultingto 11-bit mode (0.25°C/LSB), the LM73 Open-Drain ALERT Output Pin Goes Active When measures temperatureina maximum timeof 14 ms,
making it ideal for applications that requireTemperatureis Abovea Programmed
temperature data very soon after power-up. In itsTemperature Limit
maximum resolution, 14-bit mode (0.03125°C/LSB),• Very Stable, Low-noise Digital Output the LM73is optimizedto sense very small changesin• UL Recognized Component temperature.
Key Specifications A single multi-level address line selects oneof three– Supply Current unique device addresses. An open-drain ALERT
output goes active when the temperature exceedsa– Operating
programmable limit. Both the data and clock lines are– 320 µA (Typical) filtered for excellent noise tolerance and reliable– 495 µA (Maximum) communication. Additionally,a time-out featureon the Shutdown clock and data lines causes the LM73 to
automatically reset these linesif eitheris held low for– 8 µA (Maximum) an extended time, thus exiting any bus lock-up– 1.9 µA (Typical) condition without processor intervention. Temperature Accuracy
Device Information(1)– −10°Cto 80°C: ±1.0°C (Maximum)– −25°Cto 115°C: ±1.5°C (Maximum)– −40°Cto 150°C: ±2°C (Maximum)
(1) Forall available packages, see the orderable addendumat– Resolution the endofthe datasheet.– 0.25°Cto 0.03125°C
Typical Application– Conversion Time 11-Bit (0.25°C):14 ms (Maximum) 112 ms (Maximum)
