High IP3, 700 MHz TO 2800 MHz, Double Balanced, Passive Mixer, IF Amp, and Wideband LO Amp
The ADL5811 uses revolutionary new broadband, square wave limiting, local oscillator (LO) amplifiers to achieve an unprecedented radio frequency (RF) bandwidth of 700 MHz to 2800 MHz. Unlike conventional narrow-band sine wave LO amplifier solutions, this permits the LO to be applied either above or below the RF input over an extremely wide bandwidth. Because energy storage elements are not used, the dc current consumption also decreases with decreasing LO frequency.
The ADL5811 uses highly linear, doubly balanced, passive mixer cores along with integrated RF and LO balancing circuits to allow single-ended operation. The ADL5811 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 7.5 dB, and can be used with a wide range of output impedances. For low voltage applications, the ADL5811 is capable of operation at voltages down to 3.6 V with substantially reduced current. Two logic bits are provided to power down (<1.5 mA) the circuit when desired.
All features of the ADL5811 are controlled via a 3-wire serial port interface, resulting in optimum performance and minimum external components.
The ADL5811 is fabricated using a BiCMOS high performance IC process. The device is available in a 32-lead, 5mm × 5mm, LFCSP package and operates over a −40°C to +85°C temperature range. An evaluation board is also available.
- Multiband/multistandard cellular base station 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.
ADL5811-EVALZ is a fully populated, 4-layer, Rogers 3003-based evaluation board. It requires 5 V/185 mA or 3.6/125 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. RFIN is the RF input port, and LOIP is the LO input port. The IF output port, IFOP, is configured for single-ended output signaling via the on-board transformer. The IFON port provides the option for IF differential infterfacing, with R21 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 ultralow distortion and adjustable gain with external resistor , we recommend the AD8352 .
- For ultralow distortion, pin strappable gain adjust , we recommend the ADL5561 .
- 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 .
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.