Features and Benefits
- Frequency Range: 30MHz to 1300MHz
- Low Power: 2.7V to 3.6V Supply; 28mA
- Low LO Carrier Leakage: –51.5dBm at 500MHz
- Side-Band Suppression: –52.6dBc at 500MHz
- Output IP3: 20.8dBm at 500MHz
- Low RF Output Noise Floor: –156dBm/Hz at 6MHz Offset, PRF = 3dBm
- Sine Wave or Square Wave LO Drive
- SPI Control:
- Adjustable Gain: –19dB to 0dB in 1dB Steps Effecting Supply Current from 8mA to 35mA
- I/Q Offset Adjust: –65dBm LO Carrier Leakage
- I/Q Gain/Phase Adjust: –60dBc Side-Band Suppressed
- 24-Lead QFN 4mm × 4mm Package
The LTC5599 is a direct conversion I/Q modulator designed for low power wireless applications that enable 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 optimization of the LO carrier feedthrough and side-band suppression, with sine wave or square wave LO drive. A fixed LC network on the LO and RF ports covers a continuous 90MHz to 1300MHz operation. 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.
- Wireless Microphones
- Battery Powered Radios
- Ad-Hoc Wireless Infrastructure Networks
- “White-Space” Transmitters
- Software Defined Radios (SDR)
- Military Radios
Product Lifecycle 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)
Demonstration circuit 2091A is optimized for evaluation of the LTC5599 low power direct quadrature modulator. The balanced I and Q baseband input ports can be either AC- or DC-coupled to a source with a common mode voltage level of about 1.4V. Fixed LC networks on the LO and RF ports cover a continuous 90MHz to 1300MHz range. The SPI interface controls the supply current, modulator gain, and allows optimization of the LO carrier feedthrough and side-band suppression.
Documentation & Resources
R550 Reliability Data3/23/201880 K
DC2091A - Demo Manual11/20/2015648K
90mW I/Q Modulator2/10/20162M
Low-Power IQ Modulators for Generating FM1/26/2018
Baseband Design Example for LTC5589/LTC5599 Low-Power IQ Modulator7/1/2016
Low Power IQ Modulator for Digital Communications11/1/2015 LT Journal
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
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.
LTC5599 Companion Parts
Recommended Output Amplifiers
Recommended Related Parts
Recommended Suggested Oscillator
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.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC5599IUF#PBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|LTC5599IUF#TRPBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|Wafer Fabrication Data||R550 Reliability Data|
Sample & Buy
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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.