LT5578 -0.4GHz to 2.7GHz High Linearity Upconverting Mixer Application Circuit

High frequency probe high frequency line can be customized other specifications

Shunluo high frequency inductor, parallel stack inductor, shun winding inductor, authorized agent

Crystal oscillator 2.5*2.0mm 2520 0.67M~170M OSC can be supplied at any frequency

description

The LT5578 mixer is a high performance upconverting mixer optimized for frequencies from 0.4GHz to 2.7GHz. Single-ended LO inputs and RF output ports simplify board layout and reduce system cost. The mixer requires only -1dBm of LO power, and the balanced design produces low LO signal leakage to the RF output. At 1.9GHz operating frequency, the LT5578 provides a conversion gain of -0.7dB, a high OIP3 of 24.3dBm, and a low noise floor of -158dBm/Hz (at -5dBm RF output signal level).

The LT5578 provides a high performance alternative to passive mixers. Unlike passive mixers that have conversion losses and require high LO drive levels, the LT5578 provides conversion gain at much lower LO input levels and is less sensitive to LO power level variations. Lower LO drive level requirements, combined with superior LO leakage performance, will reduce the LO signal contamination of the output signal.

Characteristics

• High output IP3: 27dBm (at 0.9GHz), 24.3dBm (at 1.95GHz)
• Low noise floor: -158dBm/Hz (POUT = -5dBm)
• High conversion gain: 1.4dB (at 0.9GHz)
• Noise figure: 8.6dB
• Low LO to RF leakage: -43dBm
• Single-ended RF and LO ports
• Low LO drive level: -1dBm
• Single 3.3V power supply
• 5mm x 5mm QFN24 package (pin compatible with LT5579)
  

application

• GSM 900PCS/1800PCS and W-CDMA infrastructure
• LTE (Long Term Evolution) and WiMAX base stations
• Wireless repeater
• Public safety radio
  

LT5578 application circuit