WJ Company AM1-PCB, AM1 Datasheet
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6620 • e-mail: sales@wj.com • Web site: www.wj.com
April 2002
AM1
Product Description
The AM1 is a general purpose gain block that
offers good dynamic range in a low cost surface
mount package. The combination of flat IP3
and noise figure performance over frequency
makes it attractive for both narrow and broadband applications. Superior thermal design
allows the product to achieve +37 dBm IP3 performance at a mounting temperature of +85°C
with an associated MTBF of >100 years
3
. All
devices are 100% RF and DC tested.
Product Features
•
60-3000 MHz Bandwidth
•
+
37 dBm Output IP3
•
2.4 dB Noise Figure
•
14 dB Gain
•
+
18 dBm P1dB
•
MTBF >100 Years
•
SOT-89 SMT Package
•
Single Bias Supply (+3.3 to +4.5 V)
Functional Diagram
High Dynamic Range Gain Block
Absolute Maximum Ratings
Parameter Rating
Operating Case Temperature -40 to +85°C
Storage Temperature -55 to +125°C
DC Voltage +5.5 V
Input RF Power (continuous) +7 dBm
Operation of this device above any of these parameters may cause permanent damage.
Ordering Information
Part No. Description
AM1 High Dynamic Range Amplifier
(Available in tape and reel)
AM1-PCB Fully Assembled Application Circuit
The Communications Edge
™
Specifications
Parameter Units Min. Typical Max.
Frequency Range MHz 60 3000
S21 - Gain dB 13 14 16
S11 - Input Return Loss dB -9
S22 - Output Return Loss dB -15
Output IP3 dBm +33 +37
Output P1dB dBm +18
Noise Figure dB 2.4
Operating Current Range mA 55 75 100
Supply Voltage V 4.5
Test conditions unless otherwise noted.
1.T = 25°C, Vdd = 4.5 V, Frequency = 800 MHz, 50 Ω system.
2. OIP3 measured with two tones at an output power of 2 dBm/tone separated by 10 MHz.The
suppression on the largest IM3 product is used to calculate the OIP3 using a 2:1 slope rule.
3. MTBF calculated with channel temperature at 155˚C.
Typical Parameters
Parameter Units Typical
Frequency MHz 900 1900
S21 dB 13.4 12.2
S11 dB -12.5 -13.2
S22 dB -21.2 -17.8
Output IP3 dBm +37.5 +37.0
Output P1dB dBm +18.1 +18.0
Noise Figure dB 2.4 2.6
Typical specifications reflect AM1 measured on application circuit (AM1-PCB).
Actual Size
4
123
Function Pin No.
Input 1
Ground 2
Output/Bias 3
Ground 4
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6620 • e-mail: sales@wj.com • Web site: www.wj.com
April 2002
AM1
Performance Charts (T = 22°C, unmatched device in a 50 ohm system)
Application Circuit: 0.8 to 2.6 GHz (AM1-PCB)
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 +85°C
Thermal Resistance (Maximum) 88°C/W
Junction Temperature +155°C
(Recommended Maximum)
Notes:
1.Thermal Resistance determined at Maximum Tab Temperature and Maximum Power
Dissipation.
2. Recommended Maximum Junction Temperature insures a MTBF of 1 million hours.
3. Refer to WJ Application Note “AM1 Temperature Effects on Reliability” for more information.
20
15
10
Gain (dB)
Vds = 4.5 V
5
Id = 65 mA
0
0 500 1000 1500 2000
Frequency (MHz)
2500 3000 3500 4000 0
Gain vs. Frequency Input/Output Return Loss Gain and Output Power vs. Input Power
0
-5
-10
-15
-20
Return Loss (dB)
-25
Vds = 4.5 V
Id = 65 mA
-30
-35
500 1000 1500 2000
S11
S22
2500 3000 3500 4000
Frequency (MHz)
25
Frequency = 1.9 GHz
Vds = 4.5 V
20
Id = 69 mA
15
10
5
Gain (dB) and Output Power (dBm)
0
-5
0 5 10 15 20
Input Power (dBm)
Output Power (dBm)
Gain (dB)
Typical Specifications
Frequency 0.9 GHz 1.9 GHz 2.4 GHz
Magnitude S21 13.4 dB 12.2 dB 11.5 dB
Magnitude S11 -12.5 dB -13.2 dB -11.4 dB
Magnitude S22 -21.2 dB -17.8 dB -17.3 dB
OIP3 37.0 dBm 37 dBm 37 dBm
Noise Figure 2.4 dB 2.6 dB 2.8 dBm
Schematic
RF IN
C = 56 pF
L = 10 nH
AM1
3 or more Via
Grounds req.
Bias Vds = 4.5 V, Id = 75 mA
S-Parameters
20
10
0
-10
Magnitude (dB)
-20
-30
500 1000 1500 2000 30002500
S11
S22
Frequency (MHz)
S21
FR4 Board Layout (T = 14 Mils)
0603 Package
C = 56 pF
INPUT OUTPUT
0603 Package
L = 10 nH
GND
GND
L = 12 nH
C = 56 pF
All Trans. Lines Z = 50 Ohm
0603 Package
L = 12 nH
+4.5 V
C = 56 pF
0603 Package
C = 56 pF
0603 Package
C = 56 pF
RF OUT
DC 4.5 V
9
10
8
10
7
10
MTBF (hours)
6
10
5
10
MTBF vs. Temperature
Ground Tab
50 75 100 125 150 175 200
Temperature (°C)
Junction
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