LT5524 - Low Distortion IF Amplifier/ADC Driver with Digitally Controlled Gain

Features

  • Output IP3 at 100MHz: 40dBm
  • Maximum Output Power: 16dBm
  • Bandwidth: LF to 540MHz
  • Propagation Delay: 0.8ns
  • Maximum Gain: 27dB
  • Gain Control Range: 22.5dB
  • Gain Control Step: 1.5dB
  • Gain Control Settling Time: 500ns
  • Noise Figure: 8.6dB at 100MHz (Max Gain)
  • Output Noise Floor: –138dBm/Hz (Max Gain)
  • Reverse Isolation: –92dB
  • Single Supply: 4.75V to 5.25V
  • Shutdown Mode
  • Enable/Disable Time: 1µs
  • Differential I/O Interface
  • 20-Lead TSSOP Package

Typical Application

LT5524 Typical Application
LT5524 Typical Application

Description

The LT5524 is a programmable gain amplifier (PGA) with bandwidth extending from low frequency (LF) to 540MHz. It consists of a digitally controlled variable attenuator, followed by a high linearity amplifier. Four parallel digital inputs control the gain over a 22.5dB range with 1.5dB step resolution. An on-chip power supply regulator/filter helps isolate the amplifier signal path from external noise sources.

The LT5524’s open-loop architecture offers stable operation for any practical load conditions, including peaking free AC response when driving capacitive loads, and excellent reverse isolation.

The LT5524 may be operated broadband, where the output differential RC time constant sets the bandwidth, or it may be used as a narrowband driver with the appropriate output filter.

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
LT5524EFE#PBF TSSOP-20 FE E 05-08-1663 (CB) Yes
LT5524EFE#TRPBF TSSOP-20 FE E 05-08-1663 (CB) Yes


LT5524 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
LT5524EFE#PBF TSSOP-20 E $6.25 $4.40 Yes
LT5524EFE#TRPBF TSSOP-20 E $4.50 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
DC807A LT5524EFE | IF AMP/ADC DRIVER $125.00
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Click here to view our complete list of demo boards

Applications

  • High Linearity ADC Driver
  • IF Sampling Receivers
  • VGA IF Power Amplifier
  • 50Ω Driver
  • Instrumentation Applications

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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