ADL5387-EVALZ Analog Devices, ADL5387-EVALZ Datasheet

ADL5387-EVALZ

Manufacturer Part Number

ADL5387-EVALZ

Description

EVALBOARD/FOR ADL5387 50 MHZ TO 2 GHZ QUADRATURE DEMODULATOR

Manufacturer

Analog Devices

Datasheet

1.ADL5387.pdf (28 pages)

Specifications of ADL5387-EVALZ

Pack_quantity

Comm_code

85437090

Lead_time

Eccn

EAR99

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FEATURES

Operating RF frequency

LO input at 2 × f

Input IP3: 31 dBm @ 900 MHz

Input IP2: 62 dBm @ 900 MHz

Input P1dB: 13 dBm @ 900 MHz

Noise figure (NF)

Voltage conversion gain > 4 dB

Quadrature demodulation accuracy

Demodulation bandwidth ~240 MHz

Baseband I/Q drive 2 V p-p into 200 Ω

Single 5 V supply

APPLICATIONS

QAM/QPSK RF/IF demodulators

W-CDMA/CDMA/CDMA2000/GSM

Microwave point-to-(multi)point radios

Broadband wireless and WiMAX

Broadband CATVs

GENERAL DESCRIPTION

The ADL5387 is a broadband quadrature I/Q demodulator that

covers an RF/IF input frequency range from 50 MHz to 2 GHz.

With a NF = 13.2 dB, IP1dB = 12.7 dBm, and IIP3 = 32 dBm @

450 MHz, the ADL5387 demodulator offers outstanding dynamic

range suitable for the demanding infrastructure direct-conversion

requirements. The differential RF/IF inputs provide a well-

behaved broadband input impedance of 50 Ω and are best

driven from a 1:1 balun for optimum performance.

Ultrabroadband operation is achieved with a divide-by-2 method

for local oscillator (LO) quadrature generation. Over a wide

range of LO levels, excellent demodulation accuracy is

achieved with amplitude and phase balances ~0.05 dB and

~0.4°, respectively. The demodulated in-phase (I) and

quadrature (Q) differential outputs are fully buffered and

provide a voltage conversion gain of >4 dB. The buffered

baseband outputs are capable of driving a 2 V p-p differential

signal into 200 Ω.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

50 MHz to 2 GHz

100 MHz to 4 GHz

12.0 dB @ 140 MHz

14.7 dB @ 900 MHz

Phase accuracy ~0.4°

Amplitude balance ~0.05 dB

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The fully balanced design minimizes effects from second-order

distortion. The leakage from the LO port to the RF port is

<−70 dBc. Differential dc-offsets at the I and Q outputs are

<10 mV. Both of these factors contribute to the excellent IIP2

specifications > 60 dBm.

The ADL5387 operates off a single 4.75 V to 5.25 V supply. The

supply current is adjustable with an external resistor from the

BIAS pin to ground.

The ADL5387 is fabricated using the Analog Devices, Inc.

advanced silicon-germanium bipolar process and is available in

a 24-lead exposed paddle LFCSP.

Quadrature Demodulator

FUNCTIONAL BLOCK DIAGRAM

VPA

COM

BIAS

VPL

CMRF CMRF RFIP RFIN CMRF VPX

CML

LOIP LOIN CML

PHASE SPLITTER

DIVIDE-BY-2

Figure 1.

50 MHz to 2 GHz

CML

COM

QLO

VPB

QHI

ILO

ADL5387

IHI

www.analog.com

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