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
• 50 – 1000 MHz
• 19 dB Gain
• +22 dBm P1dB
• +42 dBm OIP3
• 1.8 dB Noise Figure
• Single Voltage Supply (+5 V)
• Lead-free/Green/RoHS-
compliant SOT-89 Package
• MTTF > 1000 years

Applications
• High linearity and low-noise
amplifier following a mixer
• High performance amplifier
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