LTC5505 - RF Power Detector with Buffered Output and >40dB Dynamic Range

The LTC5505-X is an RF power detector for RF applications operating in the 300MHz to 3.5GHz range. A temperature compensated Schottky diode peak detector and buffer amplifier are combined in a small 5-pin ThinSOT 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. A power saving shutdown mode reduces supply current to less than 2µA.

The LTC5505-1 operates with input power levels from –28dBm to 18dBm. The LTC5505-2 operates with input power levels from –32dBm to 12dBm.

Features
  • Internal Schottky Diode RF Detector with Two Input Power Ranges: LTC5505-1, –28dBm to 18dBm LTC5505-2, –32dBm to 12dBm
  • Wide Input Frequency Range: 300MHz to 3GHz (LTC5505-1); 300MHz to 3.5GHz (LTC5505-2)
  • Temperature Compensated
  • Buffered Detector Output
  • Wide VCC Range of 2.7V to 6V
  • Low Operating Current: 0.5mA
  • Low Shutdown Current: <2µA
  • Low Profile (1mm) ThinSOT Package
Typical Application
LTC5505 Typical Application
Applications
  • Multimode Mobile Phone Products
  • PCS Devices
  • Wireless Data Modems
  • Wireless and Cable Infrastructure
  • RF Power Alarm
  • Envelope Detector
Packaging
LTC5505 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC5505-1ES5#PBFSOT-23E$1.42
LTC5505-1ES5#TRMPBFSOT-23E$1.47$1.22
LTC5505-1ES5#TRPBFSOT-23E$1.20
LTC5505-2ES5#PBFSOT-23E$1.42
LTC5505-2ES5#TRMPBFSOT-23E$1.47$1.21
LTC5505-2ES5#TRPBFSOT-23E$1.19
Demo Boards
Part NumberDescriptionPrice
DC391A-ALTC5505-1ES5 | -28dBm to 18dBm RF Power Detector (postage stamp)$100.00
DC391A-BLTC5505-2ES5 | -32dBm to 12dBm RF Power Detector (postage stamp)$100.00
Datasheet
Application Note
Design Note
Reliability Data
CAD Symbol
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LTC5505 Footprints and Symbols