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

September 2004

The Communications Edge

TM

AH31

High Dynamic Range IF Amplifier

Product Information

Product Features

compliant

SOT-89 Package

Applications

amplifier following a mixer

in IF path of TX/RX systems

Product Description

The AH31 is a high dynamic range amplifier in a low-cost

surface-mount package.

The combination of low noise

figure, high gain, and high output IP3 is ideal as an IF

amplifier for receiver and transmitter applications.

The

device

combines

dependable

performance

with

consistent quality to maintain MTTF values exceeding

1000 years at mounting temperatures of +85

°C and is

available in both the standard SOT-89 package and the

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

and green SOT-89 package. All devices are 100% RF &

DC tested.

The MMIC amplifier based on GaAs MESFET technology

can be configured for IF and RF applications with various

current and next generation wireless technologies.

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

1000

Test Frequency

MHz

240

Gain

dB

19

Output P1dB

dBm

+22

Output IP3

(2)

dBm

+37

+42

Supply Voltage

V

+5

Operating Current Range

mA

120

150

180

1. Test conditions : T = 25ºC, Vdd = +5 V, 50

Ω system.

2. 3OIP measured with two tones at an output power of +10 dBm/tone separated by 1 MHz. The

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

Absolute Maximum Rating

Parameter

Rating

Operating Case Temperature

-40 to +85

°C

Storage Temperature

-55 to +150

°C

DC Voltage

+6 V

RF Input Power (continuous)

4 dB above Input P1dB

Junction Temperature

+220

° C

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

Typical Performance

(3)

Parameter Units

Typical

Frequency

MHz

75

170

240

500

900

S21

dB

19

19

19

18

16.8

S11

dB

-25

-13

-15

-15

-14

S22

dB

-25

-20

-17

-10

-11

Output P1dB

dBm

+22

+22

+22

+22

+21

Output IP3

dBm

+42

+42

+42

+42

+41

Noise Figure

dB

2.4

1.8

1.8

1.7

2.1

3. Typical parameters reflect performance in an application circuit.

Ordering Information

Part No.

Description

AH31

High Dynamic Range IF Amplifier

(leaded SOT-89 Pkg)

AH31-G

High Dynamic Range IF Amplifier

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

AH31-PCB75

65 – 85 MHz Fully Assembled Evaluation Board

AH31-PCB170

155 – 185 MHz Fully Assembled Evaluation Board

AH31-PCB240

220 – 260 MHz Fully Assembled Evaluation Board

AH31-PCB500

450 – 550 MHz Fully Assembled Evaluation Board