adl5336 Analog Devices, Inc., adl5336 Datasheet

adl5336

Manufacturer Part Number

adl5336

Description

Cascadable If Vgas With Programmable Rms Detectors

Manufacturer

Analog Devices, Inc.

Datasheet

1.ADL5336.pdf (32 pages)

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adl5336ACPZ

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FEATURES

Pair of VGAs with rms AGC detectors

VGA and AGC modes of operation

Continuous gain control range: 48 dB

Noise figure (NF) = 6.8 dB at maximum gain

IMD3 > 62 dBc for 1.0 V p-p composite output

Differential input and output

Multiplexed inputs for VGA2

Programmable detector AGC setpoints

Programmable VGA maximum gain

Power-down feature

Single 5 V supply operation

APPLICATIONS

Point-to-multipoint radios

Instrumentation

Medical

GENERAL DESCRIPTION

The

(VGAs) designed for cascaded IF applications. The amplifiers

have linear-in-dB gain control and operate from low frequencies to

1 GHz. Their excellent gain conformance over the control range

and flatness over frequency are due to Analog Devices, Inc.,

patented X-AMP® architecture, an innovative technique for

implementing high performance variable gain control.

Each VGA has 24 dB of gain control range. Their maximum gain

can be independently programmable over a 6 dB range via the

SPI. The VGAs can be cascaded to provide a total range of 48 dB.

When connected to a 50 Ω source through a 1:4 balun, the gain

is 6 dB higher. The second VGA has an SPI programmable input

switch that selects one of two external inputs.

Rev. A

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.

ADL5336

consists of a pair of variable gain amplifiers

Programmable RMS Detectors

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

Tel: 781.329.4700

Fax: 781.461.3113

When driven from a 200 Ω source or from a 50 Ω source through

a 1:4 balun, the noise figure (NF) for the composite amplifier is

6.8 dB at maximum gain. The output of each VGA can drive

100 Ω loads to 5 V p-p maximum.

Each VGA has an independent square law detector for autonomous,

automatic gain control (AGC) operation. Each detector setpoint

can be programmed independently through the SPI from −24 dBV

to −3 dBV in 3 dB steps. When both VGAs are arranged in AGC

mode and are programmed to the same setpoint, the composite NF

increases to 9 dB when backed off by 18 dB from maximum gain.

The

supply current of 80 mA. When disabled, it consumes 4 mA. It is

fabricated in an advanced silicon-germanium BiCMOS process and

is available in a 32-lead exposed paddle LFCSP package. Performance

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

MODE

VCM1

VPOS

ENBL

INM1

COM

INP1

ADL5336

VGA1

GAIN1 DTO1 GAIN2 DTO2 COMD VPSD

COM

Cascadable IF VGAs with

FUNCTIONAL BLOCK DIAGRAM

operates from a 5 V supply and consumes a typical

OPP1 OPM1 IP2A IM2A COM IP2B IM2B

Figure 1.

ADL5336

VGA2

ADL5336

SPI

www.analog.com

CLK

VCM2

VPOS

OPP2

OPM2

VPOS

COM

SDO

DATA

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