LTC5588-1 - 200MHz to 6000MHz Quadrature Modulator with Ultrahigh OIP3


  • Frequency Range: 200MHz to 6000MHz
  • Output IP3: +31dBm Typical at 2140MHz (Uncalibrated)
    +35dBm Typical (User Optimized)
  • Single Pin Calibration to Optimize OIP3
  • Low Output Noise Floor at 6MHz Offset:
    No RF: –160.6dBm/Hz
    POUT = 5dBm: –155.5dBm/Hz
  • Integrated LO Buffer and LO Quadrature Phase Generator
  • High Impedance DC Interface to Baseband Inputs with 0.5V Common Mode Voltage*
  • 50Ω Single-Ended LO and RF Ports
  • 3.3V Operation
  • Fast Turn-Off/On: 10ns/17ns
  • Temperature Sensor (Thermistor)
  • 24-Lead UTQFN 4mm × 4mm Package

Typical Application

LTC5588-1 Typical Application
LTC5588-1 Typical Application


The LTC5588-1 is a direct conversion I/Q modulator designed for high performance wireless applications. It allows direct modulation of an RF signal using differential baseband I and Q signals. It supports LTE, GSM, EDGE, TD-SCDMA, CDMA, CDMA2000, W-CDMA, WiMax and other communication standards. It can also be configured as an image reject upconverting mixer, by applying 90° phase-shifted signals to the I and Q inputs. The I/Q baseband inputs drive double-balanced mixers. An onchip balun converts the differential mixer signals to a 50Ω single-ended RF output. Four balanced I and Q baseband input ports are DC-coupled with a common mode voltage level of 0.5V. The LO path consists of an LO buffer with single-ended or differential inputs and precision quadrature generators to drive the mixers. The supply voltage range is 3.15V to 3.45V. An external voltage can be applied to the LINOPT pin to further improve 3rd‑order linearity performance. Accurate temperature dependent calibrations can be performed using the on-chip thermistor.


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
LTC5588IPF-1#PBF 4x4 UTQFN-24 PF I 05-08-1834 Yes
LTC5588IPF-1#TRPBF 4x4 UTQFN-24 PF I 05-08-1834 Yes

LTC5588-1 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
LTC5588IPF-1#PBF 4x4 UTQFN-24 I $8.22 $5.70 Yes
LTC5588IPF-1#TRPBF 4x4 UTQFN-24 I $5.76 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
DC1524A-A LTC5588-1 | 6GHz Ultrahigh OIP3 Quadrature Modulator $125.00
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Click here to view our complete list of demo boards


  • LTE, GSM/EDGE, W-CDMA, TD-SCDMA, CDMA2K, WiMax Basestations
  • Image Reject Upconverters
  • Point-to-Point Microwave Links
  • Broadcast Modulator
  • Military Radio

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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
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  • 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
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  • And More!

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