RF & Wireless RF Log Detectors

LTC2362 - 500ksps, 12-Bit Serial ADCs in TSOT-23

LT5538 - 40MHz to 3.8GHz RF Power Detector with 75dB Dynamic Range

Features

  • Frequency Range: 40MHz to 3.8GHz
  • 75dB Log Linear Dynamic Range
  • Exceptional Accuracy over Temperature
  • Linear DC Output vs. Input Power in dBm
  • -72dBm Detection Sensitivity
  • Single-ended RF Input
  • Low Supply Current: 29mA
  • Supply Voltage: 3V to 5.25V
  • 8-lead DFN 3mm × 3mm package

Typical Application

LT5538 Typical Application
LT5538 Typical Application

Description

The LT5538 is a 40MHz to 3800MHz monolithic logarithmic RF power detector, capable of measuring RF signals over a wide dynamic range, from -75dBm to 10dBm. The RF signal in an equivalent decibel-scaled value is precisely converted into DC voltage on a linear scale. The wide linear dynamic range is achieved by measuring the RF signal using cascaded RF limiters and RF detectors. Their outputs are summed to generate an accurate linear DC voltage proportional to the input RF signal in dBm. The LT5538 delivers superior temperature stable output (within ±1dB over full temperature range) from 40MHz to 3.8GHz. The output is buffered with a low impedance driver.

Packaging

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

DFN-8

LT5538 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT5538IDD#PBF DFN 8 I $6.40 $4.50 View
LT5538IDD#TRPBF DFN 8 I $4.55 View
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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
DC1120A LT5538IDD | 40MHz to 3.8GHz 75dB Dynamic Range Log Detector. Board optimized for 40MHz to 2.7GHz. Call Factory for higher freq. $100.00
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Click here to view our complete list of demo boards

Applications

  • Received Signal Strength Indication (RSSI)
  • RF Power Measurement and Control
  • RF/IF Power Detection
  • Receiver RF/IF Gain Control
  • Envelope Detection
  • ASK Receiver

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