ADL5331ACPZ-R7 Analog Devices Inc, ADL5331ACPZ-R7 Datasheet

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ADL5331ACPZ-R7

Manufacturer Part Number
ADL5331ACPZ-R7
Description
Broadband Differential VGA
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADL5331ACPZ-R7

Current - Supply
240mA
Frequency
1MHz ~ 1.2GHz
Gain
15dB
Noise Figure
9dB
Package / Case
24-VFQFN, CSP Exposed Pad
Rf Type
CATV
Test Frequency
900MHz
Voltage - Supply
4.75 V ~ 5.25 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ADL5331ACPZ-R7
ADL5331ACPZ-R7TR

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FEATURES
Voltage-controlled amplifier/attenuator
Operating frequency: 1 MHz to 1.2 GHz
Optimized for controlling output power
High linearity: OIP3 47 dBm @ 100 MHz
Output noise floor: −149 dBm/Hz @ maximum gain
Input impedance: 50 Ω
Output impedance: 20 Ω
Wide gain-control range: 30 dB
Linear-in-dB gain control function: 40 mV/dB
Single-supply voltage: 4.75 V to 5.25 V
APPLICATIONS
Transmit and receive power control at RF and IF
CATV distribution
GENERAL DESCRIPTION
The ADL5331 is a high performance, voltage-controlled
variable gain amplifier/attenuator for use in applications with
frequencies up to 1.2 GHz. The balanced structure of the signal
path maximizes signal swing, eliminates common-mode noise
and minimizes distortion while it also reduces the risk of spu-
rious feed-forward at low gains and high frequencies caused by
parasitic coupling.
The 50 Ω differential input system converts the applied
differential voltage at INHI and INLO to a pair of differential
currents with high linearity and good common-mode rejection.
The signal currents are then applied to a proprietary voltage-
controlled attenuator providing precise definition of the overall
gain under the control of the linear-in-dB interface. The GAIN
pin accepts a voltage from 0 V at a minimum gain to 1.4 V at a
full gain with a 40 mV/dB scaling factor over most of the range.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The output of the high accuracy wideband attenuator is applied
to a differential transimpedance output stage. The output stage
provides a differential output at OPHI and OPLO, which must be
pulled up to the supply with RF chokes or a center-tapped balun.
The ADL5331 consumes 240 mA of current including the out-
put pins and operates off a single supply ranging from 4.75 V
to 5.25 V. A power-down function is provided by applying a
logic low input on the ENBL pin. The current consumption in
power-down mode is 250 μA.
The ADL5331 is fabricated on an Analog Devices, Inc., pro-
prietary high performance, complementary bipolar IC process.
The ADL5331 is available in a 24-lead (4 mm × 4 mm), Pb-free
LFCSP_VQ package and is specified for operation from ambient
temperatures of −40°C to +85°C. An evaluation board is also
available.
RFIN
1 MHz to 1.2 GHz VGA with
30 dB Gain Control Range
GAIN
COM1
INHI
INLO
COM1
VPS1
VPS1
FUNCTIONAL BLOCK DIAGRAM
NC
CONTROL
STAGE
INPUT
VREF
GAIN
ENBL VPS2
BIAS
AND
IPBS
GM
©2009 Analog Devices, Inc. All rights reserved.
OPBS
Figure 1.
COM2
VPS2
COM2
VPS2
OUTPUT
ADL5331
STAGE
(TZ)
COM2
VPS2
ADL5331
COM2
COM2
VPS2
OPLO
VPS2
OPHI
www.analog.com
RFOUT

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ADL5331ACPZ-R7 Summary of contents

Page 1

FEATURES Voltage-controlled amplifier/attenuator Operating frequency: 1 MHz to 1.2 GHz Optimized for controlling output power High linearity: OIP3 47 dBm @ 100 MHz Output noise floor: −149 dBm/Hz @ maximum gain Input impedance: 50 Ω Output impedance: 20 Ω Wide ...

Page 2

ADL5331 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ...

Page 3

SPECIFICATIONS 25°C; M/A-COM ETC1-1-13 1:1 balun at input and output for single-ended 50 Ω match Table 1. Parameter Conditions GENERAL Usable Frequency Range Nominal Input Impedance Nominal Output Impedance FREQUENCY INPUT = ...

Page 4

ADL5331 Parameter Conditions POWER SUPPLIES Pin VPS1, Pin VPS2, Pin COM1, Pin COM2, Pin ENBL Voltage Current, Nominal Active ENBL, Logic 1, Device Enabled ENBL, Logic 0, Device Disabled Current, Disabled ENBL = Logic 0 1 Minimum gain voltage varies ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage VPS1 Supply Voltage VPS2 VPS2 to VPS1 RF Input Power OPHI, OPLO ENBL GAIN Internal Power Dissipation θ (with Pad Soldered to Board) JA Maximum Junction Temperature Operating Temperature Range Storage Temperature ...

Page 6

ADL5331 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic 1, 6 VPS1 2, 5 COM1 3, 4 INHI, INLO IPBS 9 OPBS 10 to 12, 14, 17 COM2 13 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 25°C; M/A-COM ETC1-1-13 1:1 balun at input and output for single-ended 50 Ω match –5 –10 –15 –20 0.1 0.3 0.5 0.7 0.9 V ...

Page 8

ADL5331 0.5 0.6 0.7 0.8 0.9 1.0 V (V) GAIN Figure 9. Output IP3 vs. V GAIN 2 CH2 500mV M 2.0µs 25.0MS/s 40.0ns/pt CH3 200mV Ω A CH1 150mV Figure 10. Step ...

Page 9

THEORY OF OPERATION The ADL5331 is a high performance, voltage-controlled variable gain amplifier/attenuator for use in applications with frequencies up to 1.2 GHz. This device is intended to serve as an output variable gain amplifier (OVGA) for applica- tions where ...

Page 10

ADL5331 APPLICATIONS INFORMATION GAIN VPOS RFIN VPOS BASIC CONNECTIONS Figure 15 shows the basic connections for operating the ADL5331. There are two positive supplies, VPS1 and VPS2, which must be connected to the same potential. Connect COM1 and COM2 (common ...

Page 11

ADL5331 RF VGA 10nF RFIN INHI OPHI INLO OPLO 10nF Figure 17. Single-Ended Drive with Balanced Output The device can be driven single-ended with similar perfor- mance, as shown in Figure 17. The single-ended input interface can be implemented ...

Page 12

ADL5331 RFIN SIGNAL DAC 220pF Figure 19. AD8319 Operating in Controller Mode to Provide Automatic Gain Control Functionality in Combination with the ADL5331 Figure 19 shows the basic connections for operating the log detector in an automatic gain control (AGC) ...

Page 13

For the AGC loop to remain in equilibrium, the track the envelope of the output signal of the ADL5331 and provide the necessary voltage levels to the gain control input of the ADL5331. Figure 21 shows an oscilloscope of the ...

Page 14

ADL5331 INTERFACING MODULATOR The basic connections for interfacing the ADL5331 with the ADL5385 are shown in Figure 24. The ADL5385 quadrature modulator with an output frequency range of 50 MHz to 2.2 GHz. It ...

Page 15

EVALUATION BOARD SCHEMATIC SW1A VPS1A 3 2 ENB_A 1 R1A ENBLA GAINA GNA C17A 1000pF AGNDA AGNDA AGNDA C8A C7A 0.1µF 100pF 1 VPS1A RSA 2 0Ω AGNDA C11A 10nF T1A 3 INHIA C12A ...

Page 16

... PIN 1 INDICATOR 1.00 12° MAX 0.85 0.80 SEATING PLANE ORDERING GUIDE Model Temperature Range ADL5331ACPZ-R7 1 −40°C to +85°C 1 ADL5331ACPZ-WP −40°C to +85°C ADL5331-EVALZ RoHS Compliant Part. ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ...

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