Alternative Parts


Features and Benefits

  • Frequency Range: 1.5GHz to 2.5GHz
  • High IIP3: 20dBm at 1.9GHz
  • High IIP2: 51dBm at 1.9GHz
  • Noise Figure: 16.8dB at 1.9GHz
  • Conversion Gain: –0.7dB at 1.9GHz
  • I/Q Gain Mismatch: 0.3dB
  • I/Q Phase Mismatch: 1°
  • Shutdown Mode
  • 16-Lead QFN 4mm x 4mm Package with Exposed Pad

Product Details

The LT5515 is a 1.5GHz to 2.5GHz direct conversion quadrature demodulator optimized for high linearity receiver applications. It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth up to 260MHz. The LT5515 incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, high frequency quadrature generator.

In an RF receiver, the high linearity of the LT5515 provides excellent spur-free dynamic range, even with fixed gain front end amplification. This direct conversion receiver can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering. Channel filtering can be performed directly at the outputs of the I and Q channels. These outputs can interface directly to channelselect filters (LPFs) or to a baseband amplifier.


  • Cellular/PCS/UMTS Infrastructure
  • High Linearity Direct Conversion I/Q Receiver
  • High Linearity I/Q Demodulator
  • RF Power Amplifier Linearization

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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)

Tools & Simulations

Design Tools


ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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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.