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LT5579 - 1.5GHz to 3.8GHz High Linearity Upconverting Mixer

The LT5579 mixer is a high performance upconverting mixer optimized for frequencies in the 1.5GHz to 3.8GHz range. The single-ended LO input and RF output ports simplify board layout and reduce system cost. The mixer needs only –1dBm of LO power and the balanced design results in low LO signal leakage to the RF output. At 2.6GHz operation, the LT5579 provides high conversion gain of 1.3dB, high OIP3 of +26dBm and a low noise floor of –157.5dBm/Hz at a –5dBm RF output signal level.

The LT5579 offers a high performance alternative to passive mixers. Unlike passive mixers, which have conversion loss and require high LO drive levels, the LT5579 delivers conversion gain at significantly lower LO input levels and is less sensitive to LO power level variations. The lower LO drive level requirements, combined with the excellent LO leakage performance, translate into lower LO signal contamination of the output signal.

Features High Output IP3: +27.3dBm at 2.14GHz Low Noise Floor: –158dBm/Hz (POUT = –5dBm) High Conversion Gain: 2.6dB at 2.14GHz Wide Frequency Range: 1.5GHz to 3.8GHz* Low LO Leakage Single-Ended RF and LO Low LO Drive Level: –1dBm Single 3.3V Supply 5mm × 5mm QFN24 Package Typical Application

Applications GSM/EDGE, W-CDMA, UMTS, LTE and TD-SCDMA Basestations 2.6GHz and 3.5GHz WiMAX Basestations 2.4GHz ISM Band Transmitters High Performance Transmitters Packaging

Demo Boards