WJ Communications, Inc. Phone: 1-800-WJ1-4401 FAX: 408-577-6620 e-mail: sales@wj.com Web site: www.wj.com
October 2003
AH3
Product Description
The AH3 is a high dynamic range amplifier
for IF requirements. The product achieves
low noise figure and high output IP3 at the
same bias point, making it ideal for receiver
and transmitter applications. In addition, the
device is internally matched for 50 ohms in a
low cost SOT-89 package. The AH3 is
manufactured using GaAs MESFET
technology and boasts an MTBF of >100 years
3
at a mounting temperature of 85C. The
package is a SOT-89. All devices are 100%
RF and DC tested.
Product Features
50 - 870 MHz
+
41 dBm Output IP3
No Matching Elements Required
3.0 dB Noise Figure
13 dB Gain
+
20 dBm P1dB
MTBF >100 Years
SOT-89 SMT Package
Single Bias Supply (+5 V)
Functional Diagram
Absolute Maximum Ratings
Parameter
Rating
Operating Case Temperature
-40 to +85C
Storage Temperature
-55 to +125C
Supply Voltage
+6.0 V
Input RF Power (continuous)
+10 dBm
Operation of this device above any of these parameters may cause permanent damage.
Ordering Information
Part No.
Description
AH3
High Dynamic Range Amplifier
(Available in tape and reel)
AH3WB-PCB
50 - 870 MHz Fully Assembled
Application Circuit
1
3
2
4
Function Pin No.
Input
Ground
Output/Bias
Ground
1
2
3
4
High Dynamic Range Gain Block
Specifications
Parameter
Units
Minimum
Typical
Maximum
Condition
Frequency Range
MHz
50
800
870
S21 - Gain
dB
12
12.9
14
S11 - Input Return Loss
1
dB
-10
S22 - Output Return Loss
dB
-20
Output IP3
dBm
+37
+41
Output P1dB
dBm
+20
Noise Figure
1
dB
4.5
50 MHz
Noise Figure
dB
3.0
450 MHz
Operating Current Range
mA
120
150
180
Vdd = 5.0 V
Supply Voltage
V
5
Test conditions unless otherwise noted, T = 25C, Vdd = 5.0 V, 50
system, 800 MHz.
1. S11 and Noise Figure can be improved using an optional input matching network.
2. OIP3 measured with 2 tones at an output power of +5 dBm/tone separated by 10 MHz. The suppression on the largest IM3 product is used to calculate OIP3 using a 2:1 slope rule.
3. MTBF calculated with ground lead temperature at 85C.
The Communications Edge
TM
WJ Communications, Inc. Phone: 1-800-WJ1-4401 FAX: 408-577-6620 e-mail: sales@wj.com Web site: www.wj.com
October 2003
AH3
Performance Charts
(Vds = 5 V. Ids = 150 mA, T = 22C, unmatched device in a 50 ohm system)
MTTF vs. Temperature
50
75
100
125
150
175
200
10
5
10
6
10
7
10
8
10
9
Temperature (C)
MTBF (hours)
Ground Tab
Junction
50
150
250
350
450
500
-40
-30
-20
-10
0
10
20
Gain and Return Loss (dB)
Frequency (MHz)
Gain and Return Loss vs. Frequency
Gain
Input Return Loss
Output Return Loss
Vd = 5.1, I = 150 mA
Application Circuit: 50 to 870 MHz (AH3 WB-PCB)
FR4 Board Layout (T = 14 Mils)
450312PC
AH3
L1
L2
C2
C1
+5.0 V
All Trans. Lines Z = 50 Ohm
Schematic
L1
12 nH
0603
L2
390 nH
1008
C2
.01
F
0603
C1
1000 pF
0603
AH3
3 or more Via
Grounds req.
RF OUT
DC +5.0 V
Typical Performance
Frequency 50 MHz 450 MHz
Magnitude S21 12.9 dB 12.9 dB
Magnitude S11 -8.3 dB -13.3 dB
Magnitude S22 -18.0 dB -15.2 dB
OIP3 36 dBm 40 dBm
Noise Figure 3.6 dB 2.7 dB
Bias Vds = 5.0 V, Id = 150 mA
-30
-10
-20
0
10
20
0
200
400
600
800
1000
Frequency (MHz)
Magnitude (dB)
S21
S11
S22
S-Parameters
RF IN
RF OUT
NOTE: The application circuit is designed for wide bandwidth. For narrow band applications,
S11 and S21 can be improved with an input shunt microstrip element to ground.
Thermal Specifications
Parameter
Rating
Operating Case Temperature
-40 to +85C
Thermal Resistance (Maximum)
59C/W
Junction Temperature
+155C
(Recommended Maximum)
Notes:
1. Thermal Resistance determined at Maximum Tab Temperature and Max Power Dissipation.
2. Recommended Maximum Junction Temperature insures a MTBF of 1 million hours.
3. Refer to WJ Application Note "AH3 Temperature Effects on Reliability" for more
information.
WJ Communications, Inc. Phone: 1-800-WJ1-4401 FAX: 408-577-6620 e-mail: sales@wj.com Web site: www.wj.com
October 2003
AH3
Specifications and information are subject to change without notice.
Outline Drawing
Land Pattern
Mounting Configuration
AH3
XXXX
Alpha-Numeric
Lot Code
WJ Communications, Inc. Phone: 1-800-WJ1-4401 FAX: 408-577-6620 e-mail: sales@wj.com Web site: www.wj.com
October 2003
AH3
Typical Test Data
S-Parameters (Vds = +5 V, Ids = 150 mA, Vds = +5 V, T = 22C, unmatched device in a 50 ohm system)
Freq (MHz)
S11 (dB)
S11 (Ang)
S21 (dB)
S21 (Ang)
S12 (dB)
S12 (Ang)
S22 (dB)
S22 (Ang)
50
-11.925
-33.34
14.151 169.58
-19.946
7.77
-18.603
-126.62
100
-13.214
-28.09
13.945
170.57
-19.984
2.69
-20.540
-149.57
150
-13.514
-28.85
13.851
169.10
-19.861
0.25
-21.161
-160.72
200
-13.481
-32.18
13.830
167.34
-19.850
-1.46
-21.226
-167.36
250
-13.550
-36.10
13.808
164.90
-19.869
-3.41
-20.906
-170.48
300
-14.051
-44.73
13.783
162.57
-19.859
-4.62
-19.259
-177.22
350
-14.115
-48.60
13.746
160.01
-19.908
-5.48
-19.065
-175.89
400
-13.529
-55.70
13.704
157.51
-19.919
-7.31
-19.122
-178.33
450
-13.598
-61.16
13.687
155.04
-19.952
-7.85
-18.712
-179.04
500
-13.321
-65.93
13.645
152.52
-19.904 -10.12
-18.665
178.55
550
-13.112
-70.97
13.595
150.15
-19.850
-10.20
-18.459
178.78
600
-12.649
-75.78
13.515
147.48
-19.911
-11.07
-18.430
177.91
650
-12.426
-80.45
13.509
145.06
-19.893
-12.83
-18.289
177.33
700
-12.102
-84.62
13.455
142.56
-19.865
-12.67
-18.306
175.94
750
-11.793
-88.75
13.389
140.08
-19.823
-14.15
-18.286
176.28
800
-11.540
-93.43
13.330
137.61
-19.924
-14.94
-18.176
174.92
850
-11.275
-96.17
13.257
135.38
-19.838
-15.94
-18.259
173.97
900
-10.971
-100.66
13.210
132.61
-20.092
-16.96
-18.196
174.37
950
-10.691
-104.85
13.080
129.83
-20.087
-19.21
-18.346
175.02
1000
-10.532
-107.99
13.035
127.70
-19.920
-19.33
-17.826
174.09
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