Dual High IP3, 700 MHz TO 2800 MHz, Double Balanced, Passive Mixer, IF Amp, and Wideband LO Amp
The ADL5812 uses highly linear, doubly balanced, passive mixer cores along with integrated RF and LO balancing circuits to allow single-ended operation. The ADL5812 incorporates programmable RF baluns, allowing optimal performance over a 700 MHz to 2800 MHz RF input frequency. The balanced passive mixer arrangement provides outstanding LO-to-RF and LO-to-IF leakages, excellent RF-to-IF isolation, and excellent intermodulation performance over the full RF bandwidth.
The balanced mixer cores also provide extremely high input linearity, allowing the device to be used in demanding wideband applications where in-band blocking signals may otherwise result in the degradation of dynamic range. Blocker noise figure performance is comparable to narrow-band passive mixer designs. High linearity IF buffer amplifiers follow the passive mixer cores, yielding typical power conversion gains of 6.7 dB, and can be used with a wide range of output impedances. For low voltage applications, the ADL5812 is capable of operation at voltages down to 3.6 V with substantially reduced current. Two logic bits are provided to individually power down (1.5 mA for both channels) the two channels as desired.
All features of the ADL5812 are controlled via a 3-wire serial port interface, resulting in optimum performance and minimum external components.
The ADL5812 is fabricated using a BiCMOS high performance IC process. The device is available in a 40-lead, 6mm × 6mm, LFCSP package and operates over a −40°C to +85°C temperature range. An evaluation board is also available.
- Multiband/multistandard cellular base station diversity receivers
- Wideband radio link diversity downconverters
- Multimode cellular extenders and broadband receivers
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This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
ADL5812-EVALZ is a fully populated, 4-layer, Rogers 3003-based evaluation board. It requires 5 V/370 mA or 3.6/267 mA power supply for normal operation. The power supply should be connected to the clip leads, labeled VPOS and AGND. All signal ports are populated with edge-mounted SMA connectors. RFIN1 and RFIN2 are the RF input ports of each channel, and LOIN is the common LO input port. The IF output ports, IFOP1 and IFOP2, are configured for single-ended output signaling via the on-board transformers. The IFON1 and IFON2 ports provide the option for IF differential interfacing, with R21 and R22 resistor removal. The evaluation board can be programmed through the USB port of a PC running Windows XP or Vista with Microsoft .NET Framework 3.5 installed. The required control software can be downloaded from www.analog.com.
Recommended RF/IF Differential Amplifiers
- For a differential input/output IF VGA , we recommend the AD8370, AD8375 or the ADL5336 .
- For adjustable gain with external resistor , we recommend the AD8351 .
- For ultralow distortion and adjustable gain with external resistor , we recommend the AD8352 .
- For ultralow distortion, pin strappable gain adjust , we recommend the ADL5561 .