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ADL5354高性能RF混頻設計
摘要: ADI 公司的ADL5354是高度線性雙平衡(RF和LO平衡)RF混頻器,輸入頻率從2300 MHz 到2900 MHz.
Abstract:
Key words :
</a><ADI" title="ADI">ADI" title="ADI">ADI" title="ADI">ADI 公司的ADL5354" title="ADL5354">ADL5354是高度線性雙平衡(RF和LO平衡)RF混頻器" title="RF混頻器">RF混頻器,輸入頻率從2300 MHz 到2900 MHz.平衡的無源混頻器具有良好的LO-RF泄漏" title="LO-RF泄漏">LO-RF泄漏,優于-35dBm.IF頻率范圍從30MHz到450MHz,功率轉換增益8dB,單邊帶(SSB) 噪音10dB,輸入IP3為25dBm,輸入P1為11dBm,LO典型驅動為0dBm.工作電壓3.3V-5.0V,主要用在蜂窩無線基站接收器,無線鏈接下變換器等.本文介紹ADL5354主要特性,方框圖以及典型應用,評估板電路圖和元件配置表.

The ADL5354 uses a highly linear, doubly balanced, passive mixer core along with integrated RF and local oscillator (LO) balancing circuitry to allow single-ended operation. The ADL5354 incorporates the RF baluns, allowing for optimal performance over a 2300 MHz to 2900 MHz RF input frequency range. The balanced passive mixer arrangement provides good LO-to-RF leakage, typically better than −35 dBm, and excellent intermodulation performance. The balanced mixer core also provides extremely high input linearity, allowing the device to be used in demanding cellular applications where in-band blocking signals may otherwise result in the degradation of dynamic performance. A high linearity IF buffer amplifier follows the passive mixer core to yield a typical power conversion gain of 8.2 dB and can be used with a wide range of output impedances.

The ADL5354 provides two switched LO paths that can be used in TDD applications where it is desirable to ping-pong between two local oscillators. LO current can be externally set using a resistor to minimize dc current commensurate with the desired level of performance. For low voltage applications, the ADL5354 is capable of operation at voltages down to 3.3 V with substantially reduced current. Under low voltage operation, an additional logic pin is provided to power down (<300 μA) the circuit when desired.

The ADL5354 is fabricated using a BiCMOS high performance IC process. The device is available in a 6 mm × 6 mm, 36-lead LFCSP and operates over a −40℃ to +85℃ temperature range.

ADL5354主要特性:

RF frequency range of 2300 MHz to 2900 MHz

IF frequency range of 30 MHz to 450 MHz

Power conversion gain: 8 dB

SSB noise figure of 10 dB

Input IP3 of 25 dBm

Input P1dB of 11 dBm

Typical LO drive of 0 dBm

Single-ended, 50 Ω RF and LO input ports

High isolation SPDT LO input switch

Single-supply operation: 3.3 V to 5 V

Exposed paddle, 6 mm × 6 mm, 36-lead LFCSP

ADL5354應用:

Cellular base station receivers

Transmit observation receivers

Radio link downconverters


圖1.ADL5354功能方框圖

圖2.ADL5354典型應用電路圖

圖3.ADL5354評估板電路圖

ADL5354評估板元件配置表:


圖4.ADL5354評估板頂層布局圖

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