Features and Benefits
- Optimized Gain Flatness from 2.5GHz to 7GHz
- 31dBm Output IP3
- 9dB Power Conversion Gain
- 15.5dB Adjustable Gain Range
- SPI or Parallel Gain Control in 0.5dB Steps
- Very Small Solution Size
- 3.3V Single Supply
- Low Power and Shutdown Modes
- 28-Lead (4mm × 5mm) QFN Package
The LTC5555 programmable gain downconverting mixer is ideal for receivers that require precise gain setting. The IC incorporates an active mixer and a digital IF VGA with 15.5dB gain control range. The IF gain is programmed in 0.5dB steps through the SPI or parallel interface.
An enable pin allows for fast turn-on and shutdown. A reduced power mode is also available.
An integrated RF transformer provides a single-ended 50Ω input. The differential LO input is designed for single-ended or differential drive. The differential IF output simplifies the interface to differential IF filters and amplifiers. The mixer is optimized for the 3GHz to 7GHz RF frequency range but may be used down to 1.5GHz with degraded performance.
- 3.6GHz, 4.8GHz and 5.8GHz Band Wireless Infrastructure Receivers
- Wireless Repeaters
- Military Radar and Communications Receivers
- Test and Measurement Equipment
- Software-Defined Radios
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration circuit 2524A is optimized for evaluation of the LTC5555 programmable gain downconverting mixer. The IC incorporates an active mixer and a digital IF VGA with 15.5dB gain control range. The IF gain is programmed in 0.5dB steps through the SPI or parallel interface. The LTC5555 has single-ended 50Ω RF input, single-ended or differential-drive LO input, and differential IF output. It features an enable pin for fast turn-on and shutdown. A reduce power mode is also available through SPI or a CMOS logic pin reducing the total current consumption by approximately 25%.
Demonstration circuit 2524A’s RF input port is 50Ω matched from 2.6GHz to 6.4GHz and can be easily tuned down to 1.5GHz or up to 7GHz. The LO port is 50Ω matched from 500MHz to 7GHz. The demo circuit’s differential IF outputs has 100Ω differential impedance and are match for 115MHz to 495MHz IF frequencies. The IF outputs can be modified for other IF frequencies or impedances. Transformer footprint pads are included on the PCB allowing the use of IF transformer to provide 50Ω single-ended IF output. See data sheet for more details on input and output impedance matching.
CAUTION: This part is sensitive to electrostatic discharge (ESD). Observe proper ESD precautions when handling the LTC5555.
Tools & Simulations
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.
Sample & Buy
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.