RF & Wireless Power Amplifier Controllers

For New Designs

LTC5532 - Precision 300MHz to 7GHz RF Detector with Gain and Offset Adjustment

LTC1758-1 - RF Power Controllers with 250kHz Control Loop Bandwidth and 40dB Dynamic Range

Features

  • Dual Band RF Power Amplifier Control (LTC1758-2)
  • Internal Schottky Diode Detector with Improved Dynamic Range vs LTC1757A
  • Wide Input Frequency Range: 850MHz to 2GHz
  • Autozero Loop Cancels Offset Errors and Temperature Dependent Offsets
  • Wide VIN Range: 2.7V to 6V
    Allows Direct Connection to Battery
  • RF Output Power Set by External DAC
  • 250kHz Control Loop Bandwidth
  • Fast Acquire After Transmit Enable
  • Internal Frequency Compensation
  • Rail-to-Rail Power Control Outputs
  • Power Control Signal Overvoltage Protection
  • Low Operating Current: 1mA
  • Very Low Shutdown Current: <1µA
  • Available in 8-PIn MSOP (LTC1758-1)
    and 10-Pin MSOP (LTC 1758-2) Packages
  • Improved Start Voltage Accuracy
  • Improved PCTL Input Filtering
  • Pin Compatible with LTC1757A-X

Typical Application

LTC1758-1 Typical Application

Description

The LTC1758-2 is a dual band RF power controller for RF power amplifiers operating in the 850MHz to 2GHz range. The loop bandwidth reduction to 250kHz improves frequency stability when controlling slow turn-on PAs such as the Philips BGY280, Conexant RM009/CX77302, Anadigics AWT6102/AWT6107 and the Hitachi PF08107/PF08123B.

The LTC1758-1 is a single output RF power controller that is identical in performance to the LTC1758-2 except that one output (VPCA) is provided. The LTC1758-1 can be used to drive a single RF or dual channel module with integral multiplexer. This part is available in an 8-pin MSOP package.

RF power is controlled by driving the RF amplifier power control pins and sensing the resultant RF output power via a directional coupler. The RF sense voltage is peak detected using an on-chip Schottky diode. This detected voltage is compared to the DAC voltage at the PCTL pin to control the output power. The RF power amplifier is protected against high supply current and high power control pin voltages.

Internal and external offsets are cancelled over temperature by an autozero control loop, allowing accurate low power programming. The shutdown feature disables the part and reduces the supply current to <1µA.

Packaging

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
Drawing		 RoHS
LTC1758-1EMS8#PBF MS-8 MS8 E 05-08-1660 Yes
LTC1758-1EMS8#TRPBF MS-8 MS8 E 05-08-1660 Yes
LTC1758-2EMS#PBF MS-10 MS E 05-08-1661 Yes
LTC1758-2EMS#TRPBF MS-10 MS E 05-08-1661 Yes


LTC1758-1 Package Drawing
LTC1758-1 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
(1-99)		 Price
(1k)*		 RoHS
LTC1758-1EMS8#PBF MS-8 E $1.95 $1.65 Yes
LTC1758-1EMS8#TRPBF MS-8 E $1.70 Yes
LTC1758-2EMS#PBF MS-10 E $2.03 $1.70 Yes
LTC1758-2EMS#TRPBF MS-10 E $1.75 Yes
Buy Now • Request Samples
* 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.

Click here to view our complete list of demo boards

Applications

  • Single and Dual Band GSM/GPRS Cellular Telephones
  • PCS Devices
  • Wireless Data Modems
  • U.S. TDMA Cellular Phones

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support