300 MHz to 1000 MHz

Quadrature Modulator

ADL5370

Rev. 0

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FEATURES

Output frequency range: 300 MHz to 1000 MHz

Modulation bandwidth: >500 MHz (3 dB)

1 dB output compression: 11 dBm @ 450 MHz

Noise floor: −160 dBm/Hz

Sideband suppression: −41 dBc @ 450 MHz

Carrier feedthrough: −50 dBm @ 450 MHz

Single supply: 4.75 V to 5.25 V

24-lead LFCSP_VQ package

APPLICATIONS

Cellular communication systems at 450 MHz

CDMA2000/GSM

WiMAX/broadband wireless access systems

Cable communication equipment

Satellite modems

FUNCTIONAL BLOCK DIAGRAM

IBBP

IBBN

VOUT

LOIP

LOIN

QBBN

QBBP

QUADRATURE

PHASE

SPLITTER

Figure 1.

GENERAL DESCRIPTION

The ADL5370 is the first in the fixed-gain quadrature modulator

(F-MOD) family designed for use from 300 MHz to 1000 MHz.

Its excellent phase accuracy and amplitude balance enable high

performance intermediate frequency or direct radio frequency

modulation for communication systems.

The ADL5370 provides a greater than 500 MHz, 3 dB baseband

bandwidth, making it ideally suited for use in broadband zero

IF or low IF-to-RF applications and in broadband digital

predistortion transmitters.

The ADL5370 accepts two differential baseband inputs and

a single-ended LO and generates a single-ended 50 Ω output.

The ADL5370 is fabricated using the Analog Devices, Inc.

advanced silicon-germanium bipolar process. It is available in

a 24-lead, exposed-paddle, Pb-free, LFCSP_VQ package. Perform-

ance is specified over a −40°C to +85°C temperature range.

A Pb-free evaluation board is available.