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Page #

Rev Date:

800 to 2200 MHz Class A Linear Design

Part Number: QB-840

1 Watt Broadband Driver Amplifier

5/12/2014

1

Features

Notes:

1. Specification ratings are based on measurements

in a 50 ohm system with a DC supply voltage

tolerance of ± 2%.

2. With the RF output port terminated into 50

ohms (Load VSWR ≤ 2.0 :1)

3. Maximum Operating Case Temperature is

defined as the baseplate temperature which,

if exceeded for extended periods, could

result in premature unit failure. This data is

provided for user reliability information.

This may or may not represent the

maximum temperature for electrical

parameter specifications.

Absolute Maximum Ratings

Mechanical Specifications

Parameter

Unit

Typical

25°C

Min/Max

25°C

Frequency Range

MHz

800 – 2200

900 – 2200

Small Signal Gain

dB

11.0

10.0 min.

Gain Flatness

dB

+/- 0.25

+/- 0.60 max.

Reverse Isolation

dB

23

20 min.

Input VSWR

—

1.2 :1

1.5 :1 max.

Output VSWR

—

1.3 :1

1.6 :1 max.

Noise Figure

dB

6.5

7.5 max.

dBm

+30.5

+29.0 min.

dBm

+48

+42 min.

dBm

+62

+52 min.

DC Voltage

Vdc

+12

+12

Operating DC Current

mA

420

500 max.

Parameter

Specification

Comments

Package (non-hermetic)

API Dwg: 080-23094

6061-T6 Al Alloy

Finish

Clear Iridite

MIL-DTL-5541F, Class 3

RF In/Out Connectors

Captivated SMA Female

2-Hole Flange Mount

DC Interface

9 Pin D-Sub (Female)

Standard Density

Cooling

Adequate Heat Sink Required

Note 4

Parameter

Specification

DC Voltage

+13.0 Vdc

+22 dBm

Operating Case

Storage Temperature

• High Output Power: +30 dBm Typical

• Flat Gain

• Balanced Configuration

• Excellent Intermodulation Performance

API Technologies’ model QB-840 is a single stage, high dynamic range driver amplifier with extended performance from 800 to

2200 MHz to cover major telecommunication bands. Using a high reliability GaAs MESFET technology in a balanced

configuration, the module is able to achieve 1W of output power at 1dB compression with exceptional linearity, gain flatness,

and VSWR at the In/Out ports across the entire frequency range. The discrete design is supplied in an aluminum package with

SMA-F connectors for the RF ports and a 9 pin D-Sub for DC power to facilitate system integration. Operating from a nominal

+12V power supply, the QB-840 draws approximately 420 mA with a small signal gain of 11 dB and a typical noise figure of 6.5

dB. Optional services include over temperature testing, environmental screening, and(or) alternate package configurations.