RF3334PCBA datasheet(5/14 Pages) RFMD

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8-461

RF3334

Rev A5 031020

Function

Description

Interface Schematic

RFAGC

RF Gain select voltage input. The voltage applied to this pin sets the

gain of the RF amplifier. The voltage applied to this pin should be

between 0.5V and 4.5V. The RF gain characteristic is such that 0.5V

yields a gain of -2dB and 4.5V yields a gain of +30dB as measured

from the input of the LNA to the output of the mixer stage.

Differential LO Input. This pin and pin 14 (LOB) are the differential LO

inputs. This input should be AC-coupled. The differential input imped-

ance across pins 13 and 14 is 75

Ω. The LO may be driven single

ended but will require a higher drive level. If a single ended LO is

applied, pin 14 should be AC-coupled to ground.

LOB

Complementary LO Input. Should be AC-coupled.

GND

Ground.

RFVCC

5V supply for RF section.

GND

Paddle

Backside of package should be connected to ground.

100 k

Ω

RFAGC

10 k

Ω

VREF

300

Ω

LOB

300

Ω

VBIAS

Ω

300

Ω

LOB

300

Ω

VBIAS

Ω

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