1kHz-3GHz High Signal Level Active Mixer

The LT5512 is an active double-balanced mixer IC, optimized for high linearity HF, VHF and UHF applications. The IC includes an integrated LO buffer amplifi er to drive the mixer and an RF buffer amplifi er for improved LO-RF isolation. Internal bias circuits eliminate the need for precision external resistors and allow the device to be powered-down using the enable control (EN) pin.

The externally matched RF and IF ports allow the mixer to be used at very low frequencies, below 1MHz or up to 3GHz. The differential LO input is designed for single-ended or a differential input drive.

The LT5512 is a high-linearity alternative to passive diode mixers. Unlike passive mixers, which have conversion loss and require high LO drive levels, the LT5512 delivers conversion gain and requires signifi cantly lower LO drive levels.

Applications

* HF/VHF/UHF Mixer

* Cellular/PCS/UMTS Infrastructure

* High Linearity Mixer Applications

* ISM Band Receivers

* Wireless Medical Telemetry System (WMTS)

* Broadband RF, LO and IF Operation

* High Input IP3:

* >20dBm from 30MHz to 900MHz

* +17dBm at 1900MHz

* Typical Conversion Gain: 1dB

* SSB Noise Figure:

* 11dB at 900MHz

* 14dB at 1900MHz

* Integrated LO Buffer: Insensitive to LO Drive Level

* Single-Ended or Differential LO Drive

* High LO-RF Isolation

* Enable Function

* 4.5V to 5.25V Supply Voltage Range

* 4mm × 4mm QFN Package