• North America Tel: 800.366.2266 / Fax: 978.366.2266

• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300

• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298

Visit www.macomtech.com for additional data sheets and product information.

M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make

changes to the product(s) or information contained herein without notice.

1

3 Volt Voltage Variable Attenuator

25 dB, DC - 2.5 GHz

Rev. V7

AT-255

ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

Features

• Single Voltage Control: 0 to -3 Volts

• 25 dB Attenuation Range at 0.9 GHz

• Low DC Power Consumption

• SOT-25 Plastic Package

• Tape and Reel Packaging Available

Description

M/A-COM’s AT-255 is a GaAs MMIC voltage

variable absorptive attenuator in a low cost SOT-25

surface

mount plastic package. The AT-255 is

ideally suited for use where variable attenuation, fine

tuning, and very low power consumption are

required.

Typical applications include radio, cellular, GPS

equipment and automatic gain/level control circuits.

The AT-255 is fabricated using a mature 1-micron

GaAs MESFET process. The process features full

chip passivation for increased performance and

reliability.

Functional Schematic

3

Part Number

Package

AT-255

Bulk Package

AT-255TR

1000 piece reel

AT-255SMB

Sample Board

Pin Configuration

Pin No.

Function

Pin No.

Function

1

RF Port

4

Ground

2

Ground

5

3

RF Port

Absolute Maximum Ratings

4

Parameter

Absolute Maximum

Input Power

+21 dBm

-8 V to +0.5 V

Operating Temperature

-40°C to +85°C

Storage Temperature

-65°C to +150°C

4. Exceeding any one or combination of these limits may cause

permanent damage to this device.

54

3

2

1

Vc

GND

GND

RF

RF

Ordering Information

1,2

1. Reference Application Note M513 for reel size information.

2. All sample boards include 5 loose parts.