ADL5358:  Dual 500 MHz to 1700 MHz Balanced Mixer with LO Buffer, IF Amp, and RF Balun

The ADL5358 utilizes two highly linear doubly balanced passive mixer cores along with integrated RF and LO balancing circuitry to enable single-ended operation. The ADL5358 incorporates two RF baluns allowing for optimal main and diversity mixer performance over a 500 to 1700 MHz RF input frequency range using high-side LO injection for RF frequencies between 500 MHz to 1100 MHz, and low side injection for RF frequencies between 1100 MHz and 1700 MHz. (For low side injection at RF frequencies between 700 MHz and 1100 MHz, please contact the factory.) The balanced passive mixer arrangement provides good LO to RF leakage, typically better than -25 dBm, 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. A high linearity IF buffer amp follows the passive mixer cores, to yield a typical power conversion gain of 8.5 dB, and can be utilized with a wide range of output impedances. (For a higher IIP3 version of the dual mixer without the IF amplifiers, please contact the factory).

The ADL5358 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 (<100µA) the circuit when desired.

For low voltage applications, the ADL5358 is capable of operation at voltages down to 3.3V with substantially reduced dc current.

The ADL5358 is fabricated using a BiCMOS high performance IC process. The device is available in a 6 mm × 6 mm 36-lead LFCSP package and operates over a −40°C to +85°C temperature range. An evaluation board is also available.

Applications

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