LTC5589 - 700MHz to 6GHz Low Power Direct Quadrature Modulator
Features
- 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
Typical Application
Description
The LTC®5589 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.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC5589IUF#PBF | 4x4 QFN-24 | UF | I | 05-08-1697 | Yes |
| LTC5589IUF#TRPBF | 4x4 QFN-24 | UF | I | 05-08-1697 | Yes |
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 (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC5589IUF#PBF | 4x4 QFN-24 | I | $6.36 | $4.45 | Yes | |
| LTC5589IUF#TRPBF | 4x4 QFN-24 | I | $6.42 | $4.50 | Yes | |
| Buy Now • Request Samples | ||||||
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 |
|---|---|---|---|
| DC2391A | LTC5589 Demoboard | 700MHz - 3.8GHz Low-Power I/Q Modulator | $125.00 | |
| Buy Now | |||
Applications
- Wireless Microphones
- Battery Powered Radios
- Vector Modulator
- 2.45GHz and 5.8GHz Transmitters
- Software Defined Radios (SDR)
- Military Radios
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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
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- 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
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.