Cascadable Amplifier

20 to 250 MHz

Rev. V3

A81 / SMA81

1

1

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Parameter

Units

Typical

Guaranteed

25ºC

0º to 50ºC -54º to +85ºC*

Frequency

MHz

10-300

20-250

20-250

Small Signal Gain (min)

dB

25.5

24.5

24.0

Gain Flatness (max)

dB

±0.1

±0.5

±0.7

Reverse Isolation

dB

31

Noise Figure (max)

dB

3.0

3.5

4.0

Power Output

@ 1 dB comp. (min)

dBm

17.0

16.0

15.5

IP3

dBm

+28

IP2

dBm

+35

Second Order Harmonic IP

dBm

+41

VSWR Input / Output (max)

1.5:1 / 1.5:1

1.9:1 / 1.9:1

2.0:1 / 2.0:1

DC Current @ 15 Volts (max)

mA

33

37

39

Features

 HIGH REVERSE ISOLATION: >30 dB (TYP.)

 HIGH GAIN: 26 dB (TYP.)

 HIGH LEVEL OUTPUT: +17 dBm (TYP.)

 LOW NOISE: 2.6 dB (TYP.)

Description

The A81 RF amplifier is a discrete hybrid design, which uses

thin film manufacturing processes for accurate performance

and high reliability.

The 2 stage silicon bipolar feedback amplifier design displays

impressive performance over a broadband frequency range.

An isolation transformer is used in the feedback loop, with the

benefit of high reverse isolation.

Both TO-8 and Surface Mount packages are hermetically

sealed, and MIL-STD-883 environmental screening is available

.

Product Image

Ordering Information

Part Number

Package

A81

TO-8

SMA81

Surface Mount

CA81**

SMA Connectorized

Absolute Maximum Ratings

Parameter

Absolute

Maximum

Storage Temperature

-62ºC to +125ºC

Case Temperature

125ºC

DC Voltage

+17 V

Continuous Input Power

+10 dBm

Short Term Input power

(1 minute max.)

50 mW

Peak Power (3 µsec max.)

0.5 W

“S” Series Burn-In

Temperature (case)

125ºC

Parameter

Rating

184ºC/W

0.155 W

Junction Temperature Rise

28ºC

** The connectorized version is not RoHs compliant.