The Communications Edge
TM 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.
+5 V
RES
ID=R1
+5.6 V zener
R=51 Ohm
AH215S8-PCB2140 Performance Data
CAP
ID=C5
C=1000 pF
CAP
ID=C4
C=10000000 pF
R1
Icq
Pdiss P1dB
OIP3
RES
ID=R2
R=22 Ohm
CAP
ID=C7
C=1000 pF
(ohms) (mA) (W) (dBm) (dBm)
CAP
ID=C6
C=10 pF
51
68
100
130
180
450
400
350
300
250
2.25
2.00
1.75
1.50
1.25
+31.0 +47.1
+30.9 +46.4
+30.8 +46.4
+30.6 +45.5
+30.5 +43.6
13
14
15
16
TLINP
ID=FR1
Z0=50 Ohm
L=375 mil
Eeff=3.16
Loss=0
IND
ID=L1
L=18nH
12
11
1
2
RES
ID=R3
R=51 Ohm
CAP
ID=C1
C=56 pF
PORT
P=1
Z=50 Ohm
PORT
P=2
Z=50 Ohm
CAP
ID=C3
C=56pF
SUBCKT
size 1008
ID=ECP100D
NET="QFN"
F0=0 MHz
10
9
3
4
TLINP
ID=FR4
Z0=50 Ohm
L=175mil
Eeff=3.16
Loss=0
CAP
ID=C8
C=1.0 pF
CAP
ID=C9
C=2.4 pF
CAP
ID=C2
C=56pF
8
7
6
5
·The transmission line length are from the
edge of the ECP100D pins to the center of the component.
All passive components are of size 0603 unless otherwise noted.
This component should be placed
at silk screen marker "3" on the
WJ evaluation board as shown.
F0=0 MHz
This component should be placed at silk screen marker
"G" on the WJ evaluation board as shown.
2.14GHz Gain vs. Output Power
2.14GHz OIP3 vs. Output Power per Tone
11.5
50
45
40
35
30
11
10.5
10
Idq=450mA ’Class A’
Idq=450mA ’Class A’
Idq=400mA
Idq=400mA
Idq=350mA
Idq=300mA
Idq=250mA
9.5
9
Idq=350mA
Idq=300mA
Idq=250mA
8.5
16
18
20
22
24
26
28
30
32
10
12
14
16
18
20
22
24
Output Power (dBm)
Power Out per Tone (dBm)
W-CDMA ACLR vs. Output Channel Power
CW PAE vs. Output Power
100
10
1
3GPP W-CDMA, Test Model 1 + 64 DPCH, ±5 MHz offset
Idq=450mA ’Class A’
Idq=400mA
-35
-40
-45
-50
-55
-60
-65
Idq=450mA ’Class A’
Idq=400mA
Idq=350mA
Idq=350mA
Idq=300mA
Idq=300mA
Idq=250mA
Idq=250mA
12
14
16
18
20
22
24
16
18
20
22
24
26
28
30
32
W-CDMA Channel Power Out (dBm)
CW Tone Power Out (dBm)
Specifications and information are subject to change without notice
Web site: www.wj.com Page 6 of 7 April 2006
WJ Communications, Inc Phone 1-800-WJ1-4401 FAX: 408-577-6621 e-mail: sales@wj.com
WJCI [ WJ COMMUNICATION. INC. ]
