BFS520 datasheet(42/130 Pages) NXP

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NXP Semiconductors RF Manual 16th edition

Dual digital IF VGAs

The BGA7350 and BGA7351 are dual, independently controlled

receive IF VGAs that operate from 50 to 250 MHz. Integrated

matching improves performance in the receiver chain, because

the VGA can drive the filter directly into the analog-to-digital

converter to ensure a constant input level. The BGA7350 has a

gain range of 24 dB, while the BGA7351 has a range of 28 dB.

For both devices, the maximum gain setting delivers at least

16 dBm output power at 1 dB gain

compression (P1dB). For gain control,

each amplifier uses a separate digital

gain-control code, which is provided

externally through two sets of five

bits. The resulting gain flatness

is 0.1 dB.

Medium power amplifier

The NXP MPAs (BGA7x2x/BGA7x3x) are based on a one-stage

amplifier, available in a low-cost surface-mount package.

It delivers a set of available output power from 24 to 30 dBm.

All cover the frequency range from 400 to 2700 MHz.

Low-noise amplifiers up to 2.8 GHz

Designed for high linearity and low noise, these monolithic

SiGe:C BiCMOS LNAs (BGU7051, BUG7052 & BGU7053) deliver

18-24 dB gain, 3-5 dB more gain than equivalents, along with

low power consumption. The RF input power overdrive of

20 dBm and the high ESD protection

(HBM 4 kV; CDM 2 kV) make these

devices extremely rugged.

Integrated biasing circuitry,

3.3 V supply voltage and low

external component count (only

6 capacitors) ensures easy system

integration.

Integrated base station LNAs with lowest NF for

the complete LNA chain

NXP provides the industry’s only fully Integrated base station

LNA that can be tailored to the needs of individual OEMs for

optimal fit in their Rx line-ups. By integrating three stages in

one monolithic design, these SiGe:C BiCMOS LNAs (BGU706x)

deliver the industry’s lowest noise figure for a receive chain

(0.9 dB), while saving up to 80% in component cost. Additionally,

the analog gain control up to 35 dB, RF input power overdrive

of 10-15 dBm, and high linearity (0.9-2.5 dBm IP3I at maximum

gain) make them very suitable in small cell sizes.

IQ modulators

The BGX7100 and BGX7101 devices combine high performance,

high linearity I and Q modulation paths for use in radio

frequency up-conversion. It supports RF frequency outputs in

the range from 400 to 4000 MHz. The BGX710x IQ modulator

is performance-independent of the IQ common mode voltage.

The modulator provides a typical output 1 dB compression point

(PL(1dB)) value of 12 dBm and a typical 27 dBm output third-

order intercept point (IP3

O). Unadjusted sideband suppression

and carrier feed through are 50 dBc and −45 dBm respectively.

A hardware control pin

provides a fast power-down/

power-up mode functionality

which allows significant

power saving. The BGX7101

is 4 dB higher gain compared

to the BGX7100.

Dual mixers

The BGX722x device combines a pair of high-performance,

high-linearity down-mixers for use in receivers having a common

local oscillator (e.g. having main and diversity paths). Each mixer

provides an input 1 dB compression point

(P1dB) above 13 dBm, with an input third-

order intercept point (IIP3) of 26 dBm.

The small-signal noise figure (NF) is below

10 dB whereas under large signal blocking

conditions the NF is typically 19 dB.

Isolation between mixers is at least 40 dB.

Synthesizer with an integrated VCO (LO generator)

The BGX7300 is a low phase noise wideband synthesizer

with an integrated VCO which allows the implementation of

an integer-N or fractional-N Phase-Locked Loop (PLL). The

integrated voltage controlled oscillator (VCO) supports a

fundamental frequency range from 2.2 GHz up to 4.4 GHz.

The BGX7300 has dual differential RF outputs, each with output

power up to +5 dBm. The VCO frequency can by divided by

1/2/4/8/16/32 before being fed to the RF outputs. Hence the

generated output frequency can be as low as 68.75MHz. For

isolation purpose, each RF output can be muted or forced into

power-down mode using a hardware pin or SPI sofware control.

A dedicated differential input stage lets the BGX7300 work with

an external VCO. Most of the characteristics are programmable

via a 3- or 4-wire Serial Peripheral Interface bus (SPI). Each VCO

is powered from an internally regulated voltage source providing

sufficient power supply rejection. The device is designed to

operate from 3.3 V nominal supply voltage connected to the

supply pins.

Selection guides of the listed components are available

in Chapter 3 (3.4.1 & 3.4.2).

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