UMTS Digital Gain Control

Amplifier, 1.94 - 2.34 GHz

4mm FQFP-N Package Style

V 1E.00

Advanced

Features

n

Digitally Controlled Gain Block

n

Parallel Control Interface

n

4mm FQFP-N Package

n

Single Positive Supply Voltage

n

0.25 dB Steps of Attenuation

n

10 dB Atttenuation Range

Description

M/A-COM’s AM55-0027 is a digitally controlled Variable

Gain Amplifier.

Attenuation range is 10 dB with

Attenuation Steps of 0.25 dB.

Attenuation is controlled

digitally through a parallel interface.

Ω, V

Parameter

Conditions

Frequency

Units

Min.

Typ.

Max.

Gain

No Attenuation

1.94 - 2.34 GHz

dB

24

26

—

Attenuation Range

—

1.94 - 2.34 GHz

dB

10

10

—

Attenuation Step Size

—

1.94 - 2.34 GHz

dB

0.2

0.25

0.3

Amplitude Flatness

—

All attenuation states

1.94 - 2.34 GHz

2.09 - 2.19 GHz

dB

dB

—

—

—

—

± 0.3

± 0.1

Input Return Loss

—

1.94 - 2.34 GHz

dB

13

18

—

Output Return Loss

—

1.94 - 2.34 GHz

dB

10

14

—

Output P1 dB

0 dB attenuation

1.94 - 2.34 GHz

dBm

15

19

—

Output IP3

0 dB attenuation

1.94 - 2.34 GHz

dBm

30

31

—

Noise Figure

0 dB attenuation

1.94 - 2.34 GHz

dB

—

4.7

—

Noise Figure

10 dB attenuation

1.94 - 2.34 GHz

dB

—

9.0

—

Supply Current

—

—

mA

—

110

120

Block Diagram

8 dB

Gain

IN

10 dB

Range

in

0.25 dB

Steps

8 dB

Gain

9 dB

Gain

OUT

Parallel

Control

Interface