ADI ADL5360 900MHz混频方案
ADI公司的ADL5360是700-1000MHz双平衡混频器,它采用两个高度线性的双平衡无源混频器核,并集成RF和本地振荡(LO)平衡电路,得以单断工作.IF频率从50MHZ 到 350MHz,功率转换增益3.5dB,单边带(SSB)噪音9.5dB,输入IP3为26dBm.工作电压3.3V到5.0V,可用作蜂窝基站接收器,无线链接下变换器和多种接收器设计.本文介绍了ADL5360的主要特性, 功能方框图, 评估板电路图以及评估板主要配置表.ADL5360: Dual 900MHz Balanced Mixer with Low Side LO Buffer, IF Amp, and RF Balun
The ADL5360 utilizes two highly linear doubly balanced passive mixer cores along with integrated RF and LO balancing circuitry to enable single-ended operation. The ADL5360
incorporates two RF baluns allowing for optimal main and diversity mixer performance over a 700 to 1000 MHz RF input frequency range using low-side LO injection. The balanced passive mixer arrangement provides good LO to RF leakage, typically better than -25dBm, and excellent intermodulation performance. The balanced mixer cores also provide 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. High linearity IF buffer amps follow the passive mixer cores, to yield a typical power conversion gain of 9.5dB.(For a higher IIP3 version of the dual mixer without the IF amplifiers, please contact the factory).
The ADL5360 provides two switched LO paths that can be utilized in TDD applications where it is desirable to rapidly alternate between two local oscillators. LO current can be
externally set using a resistor to minimize DC current commensurate with the desired level of performance. An additional 3V logic pin is provided to power down (<100uA) the circuit when desired.
For low voltage applications, the ADL5360 is capable of operation at voltages down to 3V with substantially reduced DC current.
The ADL5360 is fabricated using a BiCMOS high performance IC process. The device is available in a 6mm x 6mm 36-lead LFCSP package and operates over a −40°C to +85°C
temperature range. An evaluation board is also available.
ADL5360主要特性:
RF Frequency 700MHz to 1000MHz
IF Frequency 50MHZ to 350MHz
Power Conversion Gain of 8.5dB
SSB Noise Figure of 9.5dB
SSB NF with +10dBm blocker of 16.5dB
Input IP3 of 26dBm
Input P1dB of 10 dBm
Typical LO Drive of 0 dBm
Single-ended, 50Ω RF and LO Input Ports
High Isolation SPDT LO Input Switch
Single Supply Operation: 3.3 to 5 V
Exposed Paddle 6 x 6 mm, 36 Lead LFCSP Package
ADL5360应用:
Cellular Base Station Receivers
Main and Diversity Receiver Designs
Radio Link Downconverters
图1.ADL5360功能方框图
图2.ADL5360评估板电路图
评估板主要配置表:
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