LT5579 Datasheet | Linear Technology

.. LT5579 1.5GHz to 3.8GHz High Linearity Upconverting Mixer DESCRIPTION The LT®5579 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 - 1d Bm 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 1.3d B, high OIP3 of +26d Bm and a low noise floor of - 157.5d Bm/Hz at a - 5d Bm 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, bined with the excellent LO leakage performance, translate into lower LO signal contamination of the output signal. Features n n n n n n n n n High Output IP3: +27.3d Bm at 2.14GHz Low Noise Floor: - 158d Bm/Hz (POUT = - 5d Bm) High Conversion Gain: 2.6d B at 2.14GHz Wide Frequency Range: 1.5GHz to 3.8GHz- Low LO Leakage Single-Ended RF and LO Low LO Drive Level: - 1d Bm Single 3.3V Supply 5mm × 5mm QFN24 Package APPLICATIONS n n n n GSM/EDGE, W-CDMA, UMTS, LTE and TD-SCDMA Basestations 2.6GHz and 3.5GHz Wi MAX Basestations 2.4GHz ISM Band Transmitters High Performance Transmitters L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. - Operation over wider frequency range is possible with reduced performance. Consult Linear Technology for information and assistance. TYPICAL APPLICATION Frequency Upconversion in 2.14GHz W-CDMA Transmitter LO INPUT - 1d Bm (TYP) Gain, NF and OIP3 vs RF Output Frequency LT5579 LO 30 GAIN (d B), NF (d B), OIP3 (d Bm) 25 20 15 10 5 0 1900 SSB NF TA = 25°C VCC = 3.3V f IF =...