LTC2997 - Remote/Internal Temperature Sensor


  • Converts Remote Sensor or Internal Diode
  • Temperature to Analog Voltage
  • ±1°C Remote Temperature Accuracy
  • ±1.5°C Internal Temperature Accuracy
  • Built-In Series Resistance Cancellation
  • 2.5V to 5.5V Supply Voltage
  • 1.8V Reference Voltage Output
  • 3.5ms VPTAT Update Time
  • 4mV/°K Output Gain
  • 170μA Quiescent Current
  • Available in 6-Pin 2mm × 3mm DFN Package

Typical Application

LTC2997 Typical Application
LTC2997 Typical Application


The LTC®2997 is a high-accuracy analog output temperature sensor. It converts the temperature of an external sensor or its own temperature to an analog voltage output. A built-in algorithm eliminates errors due to series resistance between the LTC2997 and the sensor diode.

The LTC2997 gives accurate results with low-cost diodeconnected NPN or PNP transistors or with integrated temperature transistors on microprocessors or FPGAs. Tying pin D+ to VCC configures the LTC2997 to measure its internal temperature.

The LTC2997 provides an additional 1.8V reference voltage output which can be used as an ADC reference input or for generating temperature threshold voltages to compare against the VPTAT output.

The LTC2997 provides a precise and versatile micropower solution for accurate temperature sensing.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC2997CDCB#PBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC2997CDCB#TRMPBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC2997CDCB#TRPBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC2997HDCB#PBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC2997HDCB#TRMPBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC2997HDCB#TRPBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC2997IDCB#PBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LTC2997IDCB#TRMPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LTC2997IDCB#TRPBF 2x3 DFN-6 DCB I 05-08-1715 Yes

LTC2997 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC2997CDCB#PBF 2x3 DFN-6 C $2.07 Yes
LTC2997CDCB#TRMPBF 2x3 DFN-6 C $2.07 $1.50 Yes
LTC2997CDCB#TRPBF 2x3 DFN-6 C $2.07 $1.45 Yes
LTC2997HDCB#PBF 2x3 DFN-6 H $2.74 Yes
LTC2997HDCB#TRMPBF 2x3 DFN-6 H $2.74 $1.97 Yes
LTC2997HDCB#TRPBF 2x3 DFN-6 H $2.74 $1.92 Yes
LTC2997IDCB#PBF 2x3 DFN-6 I $2.38 Yes
LTC2997IDCB#TRMPBF 2x3 DFN-6 I $2.38 $1.72 Yes
LTC2997IDCB#TRPBF 2x3 DFN-6 I $2.38 $1.67 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1767A LTC2997 | Internal/Remote Temperature Sensor $50.00
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Click here to view our complete list of demo boards


  • Temperature Measurement
  • Remote Temperature Measurement
  • Environmental Monitoring
  • System Thermal Control
  • Desktop and Notebook Computers
  • Network Servers

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