Specifications and information are subject to change without notice.

WJ Communications, Inc

• Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • Web site: www.wj.com

Page 1 of 4 April 2006

AH3

High Dynamic Range Gain Block

Product Information

The Communications Edge

TM

Product Features

SOT-89 Package

Applications

Product Description

The AH3 is a high dynamic range amplifier in a low-cost

surface-mount package.

The combination of low noise

figure and high output IP3 at the same bias point makes it

ideal for receiver and transmitter applications. The device

combines dependable performance with superb quality to

maintain MTTF values exceeding 100 years at mounting

temperatures of +85

°C. The AH3 is available in the

environmentally-friendly lead-free/green/RoHS-compliant

SOT-89 package.

The broadband amplifier uses a high reliability GaAs

MESFET technology and is targeted for applications where

high linearity is required. In addition, the AH3 is internally

matched for 50 ohms.

Functional Diagram

RF IN

GND

RF OUT

GND

1

23

4

Function

Pin No.

Input

1

Output/Bias

3

Ground

2, 4

Specifications

(1)

Parameter

Units

Min

Typ

Max

Operational Bandwidth

MHz

50

870

Test Frequency

MHz

800

Gain

dB

12

12.9

14

Input Return Loss

dB

10

Output Return Loss

dB

20

Output P1dB

dBm

+20

Output IP3

(2)

dBm

+37

+41

Noise Figure

(3)

dB

2.9

Operating Current Range

mA

120

150

180

Supply Voltage

V

5

1. Test conditions unless otherwise noted: T = 25 ºC, 50

Ω system.

2. 3OIP measured with two tones at an output power of +5 dBm/tone separated by 10 MHz. The

suppression on the largest IM3 product is used to calculate the 3OIP using a 2:1 rule.

3. Noise figure can be optimized by matching the input for optimal return loss.

Absolute Maximum Rating

Parameter

Rating

Operating Case Temperature

-40 to +85

°C

Storage Temperature

-55 to +125

°C

Supply Voltage

+6 V

RF Input Power (continuous)

+10 dBm

Junction Temperature

+220

°C

Operation of this device above any of these parameters may cause permanent damage.

Typical Performance

(4)

Parameter

Units

Typical

Frequency

MHz

50

450

800

S21

dB

13.2

13

12.5

S11

dB

-8.4

-16

-15

S22

dB

-18.7

-16

-15

Output P1dB

dBm

+20

+20

+20

Output IP3

(2)

dBm

+36

+40

+41

Noise Figure

dB

6

3.5

3.4

Supply Voltage

V

5

Device Current

mA

150

4. Parameters reflect performance in an AH3WB-PCB application circuit, as shown on page 3.

Ordering Information

Part No.

Description

AH3-G

High Dynamic Range Amplifier

(lead-free/green/RoHS-compliant SOT-89 package)

AH3WB-PCB

50 – 870 MHz Fully Assembled Application Circuit