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

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

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

Specifications subject to change without notice.

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

V 2.0

Variable Voltage Gain Control Amplifier, 2.0 GHz

AM55-0023

Pin Configuration

PIN

No.

PIN

Name

Description

1

Input

RF Input

2

NC

3

NC

4

NC

5

VCTL2

Second Attenuation Control

6

NC

7

NC

8

NC

9

VCTL1

First Attenuation Control

10

NC

11

NC

12

NC

13

Output

RF Output

14

VDDB3

Bias Pins

15

VDDA3

Bias Pins

16

VDDA2

Bias Pins

17

VDDB2

Bias Pins

18

VDDB1

Bias Pins

19

VDDA1

Bias Pins

20

NC

2

Operating Instructions

Two pins, VCTL1 and VCTL2 control the attenuation function

of this part. Varying these pins between 0 and 4.5 V controls the

attenuation.

VCTL1 should be controlled first to avoid

degrading the input match and noise figure until more

attenuation is needed.

VCTL1 controls an attenuator with 30

dB of range and VCTL2 15dB of range.

The AM55-0023 has two sets of Vdd pins. VDDA1,2 ,3 and

VDDB1,2,3. VDDA should be supplied with 5 V. This voltage

is internally stepped down to 3 V to reduce current

consumption. If current consumption is not a concern OR only

3 V is available to the part then the VDDB pins should be used.

Using the VDDB pins with 5 V will also give greater IP3/IMD

performance (See graphs).

Note: When using one set of bias pins the other should be left

open circuited.

Typical Performance Curves

-25

-20

-15

-10

-5

0

0.6

0.8

1

1.2

1.4

1.6

1.8

2

FREQUENCY (GHz)

Output Return Loss

(over full attenuation range

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

0.6

0.8

1

1.2

1.4

1.6

1.8

2

FREQUENCY (GHz)

Input Return Loss

(over full attenuation range)

Absolute Maximum Ratings

1

Parameter

Absolute Maximum

Input Power

2

+20 dBm

Operating Voltages

2

Operating Temperature

-40 °C to +85 °C

Storage Temperature

-65 °C to +150 °C

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

permanent damage.

°C