Overview

Features and Benefits

  • Frequency Range: 700MHz to 6GHz
  • Low Power: 2.7V to 3.6V Supply; 29.5mA
  • Low LO Carrier Leakage: –43dBm at 1.8GHz
  • Side-Band Suppression: –50dBc at 1.8GHz
  • Output IP3: 19dBm at 1.8GHz
  • Low RF Output Noise Floor: –157dBm/Hz at 30MHz Offset, PRF = 1.8dBm, fRF = 2.17GHz
  • Sine Wave or Square Wave LO Drive
  • SPI Control:
    • Adjustable Gain: 19dB in 1dB Steps
    • Effecting Supply Current from 9mA to 39mA
    • I/Q Offset Adjust: –64dBm LO Carrier Leakage
    • I/Q Gain/Phase Adjust: –61dBc Side-Band Suppressed
  • 24-Lead 4mm × 4mm Plastic QFN Package

Product Details

The LTC5589 is a direct conversion I/Q modulator designed for low power wireless applications that enables direct modulation of differential baseband I and Q signals on an RF carrier. Single side-band modulation or side-band suppressed upconversion can be achieved by applying 90° phase-shifted signals to the I and Q inputs. The I/Q baseband input ports can be either AC or DC coupled to a source with a common mode voltage level of about 1.4V. The SPI interface controls the supply current, modulator gain, and allows adjustments of I and Q gain and phase imbalance to optimize the LO carrier feedthrough and side-band suppression. The LO port can be driven with sine wave or square wave LO drive. A fixed LC network on the LO and RF ports covers 700MHz to 6GHz operating range. An on-chip thermometer can be activated to compensate for gain-temperature variations. More accurate temperature measurements can be made using an on-chip diode. In addition, a continuous analog gain control (VCTRL) pin can be used for fast power control.

Applications

  • Wireless Microphones
  • Battery Powered Radios
  • Vector Modulator
  • 2.45GHz and 5.8GHz Transmitters
  • Software Defined Radios (SDR)
  • Military Radios

Product Categories

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.