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LT5578 Datasheet(PDF) 1 Page - Linear Technology |
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LT5578 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LT5578 1 5578f TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION 0.4GHz to 2.7GHz High Linearity Upconverting Mixer n GSM 900PCS/1800PCS and W-CDMA Infrastructure n LTE and WiMAX Basestations n Wireless Repeaters n Public Safety Radios Frequency Upconversion in LTE Transmitter Gain, NF and OIP3 vs RF Output Frequency n High Output IP3: 27dBm at 0.9GHz 24.3dBm at 1.95GHz n Low Noise Floor: –158dBm/Hz (POUT = –5dBm) n High Conversion Gain: 1.4dB at 0.9GHz n Noise Figure: 8.6dB n Low LO-RF Leakage: –43dBm n Single-Ended RF and LO Ports n Low LO Drive Level: –1dBm n Single 3.3V Supply n 5mm × 5mm QFN24 Package (Pin Compatible with LT5579) The LT ®5578 mixer is a high performance upconverting mixer optimized for frequencies in the 0.4GHz to 2.7GHz 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 1.95GHz operation, the LT5578 provides conversion gain of –0.7dB, high OIP3 of 24.3dBm and a low noise floor of –158dBm/Hz at a –5dBm RF output signal level. The LT5578 offers a high performance alternative to pas- sive mixers. Unlike passive mixers, which have conversion loss and require high LO drive levels, the LT5578 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. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BIAS LT5578 RF GND LO VCC VCC 3.3V 5579 TA01a 10μF IF+ IF– 100nH 13.7Ω 13.7Ω 39pF 220pF TC4-1W+ 4:1 220pF 6.8pF 2.7pF 100μF 1nF 2pF RF 700MHz TO 950MHz LO INPUT –1dBm IF 140MHz 22nH 2.7pF 13nH 100nH RF OUTPUT FREQUENCY (MHz) 650 20 25 30 OIP3 800 900 5578 TA01b 15 10 700 750 850 950 1000 5 0 SSB NF GAIN TA = 25°C fIF = 140MHz fLO = fRF – fIF |
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