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AT-255TR

3Volt Voltage Variable Attenuator 25 dB, DC - 2.5 GHz

M/A-COM Technology Solutions, Inc. 

3 Volt Voltage Variable Attenuator, 25 dB, DC - 2.5 GHz

Absolute Maximum Ratings1

Parameter

Absolute Maximum

Maximum Input Power

+21 dBm

Control Voltage VC

-8V, +0.5V

Operating Temperature

-40°C to +85°C

Storage Temperature

-65°C to +150°C

1. Exceeding any one or a combination of these limits may cause

permanent damage.

Typical Performance Curves

Functional Schematic1

Vc

GND

5

4

1 23

RF GND RF

1. VCC = 0 VDC to -3 VDC @ 50 µA max.

AT-255

Relative Attenuation vs. Control Voltage

0

-5

-10

-15

2.5GHz

-20

1.0GHz

-25

-30

-35

-3

-2

-1

CONTROL VOLTAGE (VOLTS)

50MHz

0

Insertion Loss vs. Frequency

0

-1

-2

-3

-4

0

1

2

3

4

FREQUENCY(GHz)

Maximum Relative Attenuation vs. FQrequency

0

-5

-10

-15

-20

-25

-30

-35

0

0.5

1

1.5

2

2.5

3

FREQUENCY (GHz)

0 Return Loss vs. Control @ 900 MHz

-5

-10

-15

-20

-25

-3

-2

-1

0

CONTROL VOLTAGE (VOLTS)

IInNpPuUtTIPIP33vvss.CCOoNnTtrRoOl LVoVlOtaLgTeAGE

45

40

35

500 MHz

30

25

50MHz

20

15

10

5

0

-3

-2

-1

0

CONTROL VOLTAGE (VOLTS)

Specifications subject to change without notice.

North America: Tel. (800) 366-2266, Fax (800) 618-8883

Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298

Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020

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

Input P1dB vs. Control Voltage

30

25

50MHz

20

15 500MHz

10

5

0

-3

-2

-1

0

CONTROL VOLTAGE (VOLTS)

V 4.0

2

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