Description

The ADL5330 is a high performance, voltage controlled, variablegain amplifier (VGA)/attenuator for use in applications withfrequencies up to 3 GHz. The balanced structure of the signalpath minimizes distortion while it also reduces the risk ofspurious feedforward at low gains and high frequencies causedby parasitic coupling. While operation between a balanced sourceand load is recommended, a single sided input is internallyconverted to differential form.The input impedance is 50 ? from INHI to INLO. The outputsare usually coupled into a 50 ? grounded load via a 1:1 balun. Asingle supply of 4.75 V to 5.25 V is required.The 50 ? input system converts the applied voltage to a pair ofdifferential currents with high linearity and good commonrejection even when driven by a single sided source. The signalcurrents are then applied to a proprietary voltage controlledattenuator providing precise definition of the overall gain underthe control of the linear in dB interface. The GAIN pin accepts avoltage from 0 V at minimum gain to 1.4 V at full gain with a20 mV/dB scaling factor. The output of the high accuracy wideband attenuator is appliedto a differential transimpedance output stage. The output stagesets the 50 ? differential output impedances and drives theOPHI and OPLO pins. The ADL5330 has a power-downfunction. It can be powered down by a Logic LO input on theENBL pin. The current consumption in power-down mode is250 ?A.The ADL5330 is fabricated on an Analog Devices, Inc.,proprietary high performance, complementary bipolar IC process.The ADL5330 is available in a 24-lead (4 mm ? 4 mm), Pb-freeLFCSP package and is specified for operation from ambienttemperatures of ?40?C to +85?C. An evaluation board is alsoavailable. Applications Transmit and receive power control at RF and IF

Type:

Part number: ADL5330-EVALZ

More details from Analog Devices Inc.