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

Page 6 of 7

April 2006

ECP100D

1 Watt, High Linearity InGaP HBT Amplifier

Product Information

Application Note: Reduced Bias Configurations

The ECP100D, like the AH215-S8 can be configured to operate with lower bias current by varying the bias-adjust resistor –

R1. The recommended circuit configurations shown previously in this datasheet have the device operating in Class A

operation. Lowering the current has little effect on the gain, OIP3, and P1dB performance of the device, but will slightly lower

the ACLR/ACPR performance of the device as shown below. An example of the measured data below represents the AH215-

S8 measured and configured for 2.14 GHz applications. It is expected that variation of the bias current for other frequency

applications will produce similar performance results.

AH215S8-PCB2140 Performance Data

R1

(ohms)

Icq

(mA)

Pdiss

(W)

P1dB

(dBm)

OIP3

(dBm)

51

450

2.25

+31.0

+47.1

68

400

2.00

+30.9

+46.4

100

350

1.75

+30.8

+46.4

130

300

1.50

+30.6

+45.5

180

250

1.25

+30.5

+43.6

CAP

ID=C1

C=56 pF

CAP

ID=C2

C=56 pF

CAP

ID=C3

C=56 pF

CAP

ID=C4

C=10000000 pF

CAP

ID=C5

C=1000 pF

CAP

ID=C6

C=10 pF

CAP

ID=C7

C=1000 pF

CAP

ID=C8

C=1.0 pF

CAP

ID=C9

C=2.4 pF

TLINP

ID=FR4

Z0=50 Ohm

L=175 mil

Eeff=3.16

Loss=0

F0=0 MHz

TLINP

ID=FR1

Z0=50 Ohm

L=375 mil

Eeff=3.16

Loss=0

F0=0 MHz

RES

ID=R1

R=51 Ohm

RES

ID=R2

R=22 Ohm

IND

ID=L1

L=18 nH

RES

ID=R3

R=51 Ohm

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

SUBCKT

ID=ECP100D

NET="QFN"

PORT

P=1

Z=50 Ohm

PORT

P=2

Z=50 Ohm

"G" on the WJ evaluation board as shown.

This component should be placed at silk screen marker

edge of the ECP100D pins to the center of the component.

·The transmission line length are from the

WJ evaluation board as shown.

at silk screen marker "3" on the

This component should be placed

+5 V

All passive components are of size 0603 unless otherwise noted.

size 1008

+5.6 V zener

2.14GHz Gain vs. Output Power

8.5

9

9.5

10

10.5

11

11.5

16

18

20

22

24

26

28

30

32

Output Power (dBm)

Idq=450mA ’Class A’

Idq=400mA

Idq=350mA

Idq=300mA

Idq=250mA

2.14GHz OIP3 vs. Output Power per Tone

30

35

40

45

50

10

12

14

16

18

20

22

24

Power Out per Tone (dBm)

Idq=450mA ’Class A’

Idq=400mA

Idq=350mA

Idq=300mA

Idq=250mA

W-CDMA ACLR vs. Output Channel Power

3GPP W-CDMA, Test Model 1 + 64 DPCH, ±5 MHz offset

-65

-60

-55

-50

-45

-40

-35

12

14

16

18

20

22

24

W-CDMA Channel Power Out (dBm)

Idq=450mA ’Class A’

Idq=400mA

Idq=350mA

Idq=300mA

Idq=250mA

CW PAE vs. Output Power

1

10

100

16

18

20

22

24

26

28

30

32

CW Tone Power Out (dBm)

Idq=450mA ’Class A’

Idq=400mA

Idq=350mA

Idq=300mA

Idq=250mA