400 MHz to 6 GHz

Broadband Quadrature Modulator

Data Sheet

ADL5375

Rev. C

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FEATURES

Output frequency range: 400 MHz to 6 GHz

1 dB output compression: ≥9.4 dBm from 450 MHz to 4 GHz

Output return loss ≤ 12 dB from 450 MHz to 4.5 GHz

Noise floor: −160 dBm/Hz @ 900 MHz

Sideband suppression: ≤−50 dBc @ 900 MHz

Carrier feedthrough: ≤−40 dBm @ 900 MHz

IQ3dB bandwidth: ≥ 750 MHz

Baseband input bias level

ADL5375-05: 500 mV

ADL5375-15: 1500 mV

Single supply: 4.75 V to 5.25 V

24-lead LFCSP_VQ package

APPLICATIONS

Cellular communication systems

GSM/EDGE, CDMA2000, W-CDMA, TD-SCDMA

WiMAX/LTE broadband wireless access systems

Satellite modems

FUNCTIONAL BLOCK DIAGRAM

IBBP

IBBN

QBBN

QBBP

RFOUT

DSOP

LOIP

LOIN

QUADRATURE

PHASE

SPLITTER

ADL5375

Figure 1.

GENERAL DESCRIPTION

The ADL5375 is a broadband quadrature modulator designed for

operation from 400 MHz to 6 GHz. Its excellent phase accuracy

and amplitude balance enable high performance intermediate

frequency or direct radio frequency modulation for commu-

nication systems.

The ADL5375 features a broad baseband bandwidth, along

with an output gain flatness that varies no more than 1 dB

from 450 MHz to 3.5 GHz. These features, coupled with a broad-

band output return loss of ≤−12 dB, make the ADL5375 ideally

suited for broadband zero IF or low IF-to-RF applications,

broadband digital predistortion transmitters, and multiband

radio designs.

The ADL5375 accepts two differential baseband inputs and

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

The two versions offer input baseband bias levels of 500 mV

(ADL5375-05) and 1500 mV (ADL5375-15).

The ADL5375 is fabricated using an advanced silicon-germanium

bipolar process. It is available in a 24-lead, exposed paddle, lead-

free, LFCSP_VQ package. Performance is specified over a −40°C

to +85°C temperature range. A lead-free evaluation board is

also available.