37.0-40.0 GHz GaAs MMIC

Buffer Amplifier, QFN

B1014-QT

Page 5 of 6

App Note [1] Biasing - It is recommended to bias the amplifier with Vd=4.0V and Id

biasing to keep the currents constant as the RF power and temperature vary; this gives the most reproducible results. Depending on the

supply voltage available and the power dissipation constraints, the bias circuit may be a single transistor or a low power operational

amplifier, with a low value resistor in series with the drain supply used to sense the current.The gate of the pHEMT is controlled to maintain

correct drain current and thus drain voltage.The typical gate voltage needed to do this is -0.3V.Typically the gate is protected with Silicon

diodes to limit the applied voltage. Also, make sure to sequence the applied voltage to ensure negative gate bias is available before applying

the positive drain supply.

App Note [2] Bias Arrangement -

Each DC pin (Vd and Vg) needs to have DC bypass capacitance (100pF/10nF/1uF) as close to the package as possible.

MTTF

Typical Application

Factory Automation and Identification

Mixer

Mimix Broadband MMIC-based 37.0-40.0 GHz Transmitter Block Diagram

RF OUT

37.0-39.5 GHz

XU1019-QH

XP1080-QK

XB1014-QT

Coupler

IF In

2 GHz

LO

Buffer

X2

X

XB1014-QT: MTTF hours vs. Package Base Temperature

Vd1,2,3=4V; Id1=Id2=62.5mA, Id3=125mA

1.0E+03

1.0E+04

1.0E+05

1.0E+06

1.0E+07

1.0E+08

1.0E+09

1.0E+10

1.0E+11

1.0E+12

1.0E+13

1.0E+14

20

30

40

50

60

70

80

90

100

110

120

Package Base Temp (ºC)

XB1014-QT: Tch (max) vs. Package Base Temperature

Vd1,2,3=4V; Id1=Id2=62.5mA, Id3=125mA

0

20

40

60

80

100

120

140

160

180

200

20

30

40

50

60

70

80

90

100

110

120

Package Base Temp (ºC)

XB1014-QT: Operating Power De-rating Curve

(continuous)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

20

30

40

50

60

70

80

90

100

110

120

130

140

150

Package Base Temp (ºC)

Mimix

Designator

-QT

Package

Type

QFN (3x3mm)

P

Pitch

8mm

P

Pitch

4mm

W Tape

Width

12mm

Number of

leads offered

16

Reel

Diameter

329mm (13in)

Units

per Reel

2000

Component Orientation:

Parts are to be oriented with the PIN 1 closest to the tape's round sprocket holes on the tape’s trailing edge.

Note: Tape and Reel packaging is ordered with a -000T suffix. Package is available in 500 unit reels through designated sales channels.

Minimum order quantities should be discussed with your local sales representative.

Mimix Broadband, Inc., 10795 Rockley Rd., Houston,Texas 77099

Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com

Characteristic Data and Specifications are subject to change without notice. ©2011 Mimix Broadband, Inc.

Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept

their obligation to be compliant with U.S. Export Laws.

January 2011 - Rev 10-Jan-11