TMP100NA/3K

• 12-Bit Digital Temperature Measurement
• I2C and SMBus 2-Wire Interface with Address Selection
• Supply Range of 2.7V to 5.5V
• Operating Current of 75uA, Quiescent 45uA
• Measurement Range of -55C to 125C
• 6-Pin SOT-23, 2.9mm X 1.6mm, Lead Free and RoHS Compliant

The Texas Instruments TMP100NA/3K is a 12-bit digital temperature sensor with an I2C and SMBus 2-wire interface in a 6-pin SOT-23 measuring 2.9mm x 1.6mm with a 1.2mm thickness, supplied on tape and reel. It operates from a 2.7V to 5.5V supply, drawing 75uA operating and 45uA quiescent current, and measures across a -55C to 125C range with a 150C maximum junction temperature. The product name gives a 2C accuracy figure. TI lists the TMP100NA/3K lead free, RoHS compliant, Active and in Production. Two record notes: the Resolution attribute reads 1.5B, which is the 12-bit figure expressed in bytes rather than a temperature resolution, and the Height attribute reads 0m against a 1.2mm thickness entry.

Digital temperature sensors on a two-wire bus are placed wherever a system needs to know a local temperature without running analog wiring back to an ADC: monitoring processor, FPGA and power-stage hot spots on a board, thermal protection and fan control in power supplies and servers, battery-pack and charger temperature limits, ambient sensing in HVAC and building-automation nodes, and cold-chain and instrument monitoring. Because the interface is addressable, several devices share one bus and the controller polls each in turn, which is how multi-zone thermal management is implemented with minimal pin count. Reporting temperature as a digital value removes the sensor cable, reference and calibration error that a thermistor or thermocouple front end introduces. Buyers are computing, telecom, industrial, medical and appliance OEMs, and a part like the TMP100NA/3K is often added late in a design once thermal validation identifies a hot spot that needs closed-loop control.