LTC5509 - 300MHz to 3GHz RF Power Detector in SC70 Package


  • Temperature Compensated Internal Schottky Diode RF Detector
  • Wide Input Frequency Range: 300MHz to 3GHz
  • Wide Input Power Range: �30dBm to 6dBm
  • Buffered Detector Output
  • Wide VCC Range of 2.7V to 6V
  • Low Operating Current: 600µA
  • Low Shutdown Current: <2µA
  • SC70 Package

Typical Application

LTC5509 Typical Application
LTC5509 Typical Application


The LTC™5509 is an RF power detector for RF applications operating in the 300MHz to 3GHz range. A temperature compensated Schottky diode peak detector and buffer amplifier are combined in a small SC70 package. The supply voltage range is optimized for operation from a single lithium-ion cell or 3xNiMH.

The RF input voltage is peak detected using an on-chip Schottky diode. The detected voltage is buffered and supplied to the VOUT pin without gain compression. Consequently, the output voltage is linearly proportional to the RF input voltage. A power saving shutdown mode reduces supply current to less than 2µA.

The LTC5509 operates with input power levels from �30dBm to 6dBm.


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
LTC5509ESC6#PBF SC-70 SC6 E 05-08-1638 Yes
LTC5509ESC6#TRMPBF SC-70 SC6 E 05-08-1638 Yes
LTC5509ESC6#TRPBF SC-70 SC6 E 05-08-1638 Yes

LTC5509 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
LTC5509ESC6#PBF SC-70 E $2.00 Yes
LTC5509ESC6#TRMPBF SC-70 E $2.00 $1.43 Yes
LTC5509ESC6#TRPBF SC-70 E $2.00 $1.41 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
DC539B LTC5509ESC6 | 3 GHz RF Power Detector (No Gain Compression) $100.00
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