AD8331-EVALZ Analog Devices Inc, AD8331-EVALZ Datasheet

AD8331-EVALZ

Manufacturer Part Number

AD8331-EVALZ

Description

BOARD EVAL FOR AD8331

Manufacturer

Analog Devices Inc

Series

X-AMP®r

Datasheet

1.AD8331-EVALZ.pdf (4 pages)

Specifications of AD8331-EVALZ

Design Resources

Interfacing the High Frequency AD8331 to AD9215 (CN0096)

Channels Per Ic

1 - Single

Amplifier Type

Variable Gain

Output Type

Differential

Slew Rate

650 V/µs

-3db Bandwidth

120MHz

Current - Output / Channel

165mA

Operating Temperature

-40°C ~ 85°C

Current - Supply (main Ic)

25mA

Voltage - Supply, Single/dual (±)

4.5 V ~ 5.5 V

Board Type

Fully Populated

Utilized Ic / Part

AD8331

Silicon Manufacturer

Analog Devices

Application Sub Type

Variable Gain Amplifier

Kit Application Type

Amplifier

Silicon Core Number

AD8331

Kit Contents

Board

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

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GENERAL DESCRIPTION

The AD8331 evaluation board is a platform for testing and

evaluating the AD8331 variable gain amplifier (VGA). The

board is provided completely assembled and tested; therefore,

the user only needs to connect an input signal, V

and a single 5 V power supply.

USER SUPPLIED OPTIONAL COMPONENTS

As shown in the schematic in Figure 2 (fixed), the board has

provisions for optional components. The basic components are

shown in black, and the optional components, which can be

installed at the user’s discretion, are shown in grey.

The input impedance of the LNA is configured for 50 Ω to

accommodate most signal generators and network analyzers.

Input impedances up to 6 kΩ can be realized by changing the

values of RFB and CSH. Consult the

details on this circuit feature. See Table 1 for typical values of

input impedance and corresponding components.

Table 1. LNA External Component Values for Common Source

Impedances

100

200

500

6 k

The board is designed for 0805 size surface-mount components.

Space is provided for various popular configurations of overload

diodes at locations D1, D2, or D3.

The LNA can be evaluated on its own. If so used alone, it must

be ac-coupled with capacitors at its differential output. Typical

values are 0.1 μF, and they are installed at Position C1 and

Position C2.

Resistors of 0 Ω are installed at R4 and R8, unless capacitive

loads larger than 10 pF are connected to the SMA connectors,

LON, and LOP (such as coaxial cables.) In that event, small

value resistors (68 Ω to 100 Ω) must be installed at R4 and R8.

A resistor can be inserted at RCLMP if output clamping is

desired. Consult the

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.

(Ω)

RFB (Ω, Nearest 1% Value)

274

412

562

1.13 k

3.01 k

∞

AD8331

data sheet for appropriate values.

AD8331

data sheet for

GAIN

CSH (pF)

1.2

None

sources,

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

Tel: 781.329.4700

Fax: 781.461.3113

The preferred signal detection method is a differential probe

connected to VO, as shown in Figure 3. Single-ended loads can

be connected using the board edge SMA connector, VOH. Be

sure to take into account the 25.8 dB attenuation incurred when

using the board in this manner.

MEASUREMENT SETUP

The basic board connection for measuring bandwidth is shown

in Figure 3. A 5 V, 100 mA minimum power supply, and a low

noise, voltage reference supply for GAIN is required. Table 2

lists jumpers, and Figure 3 shows their function and positions.

Table 2. Jumper Functions

No.

ENBL

ENBV

W5, W6

Mode

HI_LO

BOARD LAYOUT AND PARTS LIST

The evaluation board circuitry uses four conductor layers. The

two inner layers are grounded, and all interconnecting circuitry

is located on the outer layers. Figure 5 to Figure 8 illustrate the

copper patterns. Table 3 is a part’s list.

Function

Enables the LNA when inserted in the top position

Enables the VGA when inserted in the top position

Connects the AD8331’s outputs to the SMA connectors

Bottom, gain increases with V

with V

Top, HI gain; bottom, LO gain (shown in Hi gain position)

AD8331 Evaluation Board

GAIN

Figure 1. AD8331-EVAL Top View

AD8331-EVAL

GAIN

; Top, gain decreases

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Related parts for AD8331-EVALZ

AD8331-EVALZ Summary of contents

Page 1

... GENERAL DESCRIPTION The AD8331 evaluation board is a platform for testing and evaluating the AD8331 variable gain amplifier (VGA). The board is provided completely assembled and tested; therefore, the user only needs to connect an input signal, V and a single 5 V power supply. USER SUPPLIED OPTIONAL COMPONENTS As shown in the schematic in Figure 2 (fixed), the board has provisions for optional components ...

Page 2

... LOP DIFFERENTIAL DP8200 PRECISION VOLTAGE REFERENCE (FOR VGAIN) +5V CLMD +C3 0.1µF 10µ 10V LMD COMM C INH 0.1µ INH ENBL CSH CFB 22pF DUT 0.018µF AD8331ARQ RFB 274Ω + VPS ENBV L2 C6 120nH FB 0.1µ LON COMM 120nH LOP VOL ...

Page 3

... Figure 4. Top Silkscreen Figure 5. Primary Side Copper Figure 6. Secondary Side Copper Figure 7. Internal Layer Ground Figure 8. Power Plane Rev Page AD8331-EVAL ...

Page 4

... Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. ORDERING GUIDE Model Description AD8331-EVAL Evaluation Board with AD8331ARQ ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Reference Designation L1, L2, L3, L4, L5 RFB ...

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