ANALOG DEVICES ADL5802 Service Manual

Dual Channel, High IP3,

ADL5802

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

that may result from its use. Specifications subject to change without notice. No

07882-001

GNDENBL LOIP

LOIN

VPOS

GND

OP2+

RF1–RF1+VPOS

7 8

212223

ADL5802

1920

RF2–GND

GND VSET

GND

RF2+

OP2–

VPOS

GND

OP1+

OP1–

9 10 11 12

IP3

BIAS

FEAT URE S

Power conversion gain of 1.6 dB Wideband RF, LO, and IF ports SSB noise figure of 11 dB Input IP3 of 28 dBm Input P1dB of 12 dBm Typical LO drive of 0 dBm Low LO leakage Single supply operation: 5 V @ 240 mA Exposed paddle, 4 mm × 4 mm, 24-lead LFCSP package

APPLICATIONS

Cellular base station receivers Main and diversity receiver designs Radio link downconverters

GENERAL DESCRIPTION

The ADL5802 uses high linearity, double-balanc ed, active mixer cores with integrated LO buffer amplifiers to provide high dynamic range frequency conversion from 100 MHz to 6 GHz. The mixers benefit from a proprietary linearization architecture that provides enhanced i np ut IP3 performance when subject to high input levels. A bias adjust feature allows the input linearity, SSB noise figure, and dc current to be optimized using a single control pin. The high input linearity allows the device to be used in demanding cellular applications where in-band blocking signals may otherwise result in degradation in dynamic performance. The balanced active mixer arrangement provides superb LO to RF and LO to IF leakage, typically better than −30 dBm.

100 MHz to 6 GHz Active Mixer

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

The IF outputs are designed for a 200 Ω source impedance and provide a typical voltage conversion gain of 7.6 dB when loaded into a 200 Ω load.

The ADL5802 is fabricated using a SiGe high performance IC process. The device is available in a compact 4 mm × 4 mm, 24-lead LFCSP package and operates over a −40° C to +85°C temperature range. An evaluation board is also available.

Rev. 0

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