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 1 of 3 May 2007
WJA1515
+5V Active-Bias InGaP HBT Gain Block
Product Features
• 50 – 1000 MHz
• 15 dB Gain
• +19 dBm P1dB
• +38 dBm OIP3
• +5V Single Voltage Supply
• Internal Active Bias Supply
• Internally matched to 50 Ω
• Lead-free / RoHS-compliant /
Green SOT-89 package
Applications
• IF Amplifier
• Repeaters, BTS Transceivers
• VHF/UHF
• Wireless Infrastructure
• General Purpose
Product Description
The WJA1515 is a high performance amplifier that offers
high linearity in a low-cost surface-mount package. At 200
MHz, the WJA1515 typically provides 15 dB gain, +38
dBm OIP3, and +19 dBm P1dB. The device is housed in a
lead-free/green/RoHS-compliant SOT-89 industry-standard
SMT package using a NiPdAu plating to eliminate the
possibility of tin whiskering.
The WJA1515 consists of Darlington pair amplifiers using
a high reliability InGaP/GaAs HBT process technology.
The MMIC amplifier is internally matched to 50Ω and only
requires DC-blocking capacitors and an inductive RF choke
for operation. Biased directly from a 5V supply, an internal
active bias network enables stable operation over
temperature, eliminating the need for the typical dropping
bias resistor.
The amplifier is targeted for high performance IF applications
in existing and next generation wireless technologies. In
addition, the WJA1515 will work for various other
applications within the 50 to 1000 MHz frequency range.
Functional Diagram
RF IN GND RF OUT
GND
1 23
4
Function Pin No.
Input 1
Output/Bias 3
Ground 2, 4
Target Specifications
Parameter Units Min Typ Max
Operational Bandwidth MHz 50 1000
Test Frequency MHz 200
Gain dB 14.7
Input Return Loss dB 13
Output Return Loss dB 17
Output P1dB dBm +19
Output IP3 (2) dBm +37.8
Noise Figure dB 4.6
Device Voltage V 5
Device Current mA 65
1. Test conditions: 25 ºC, Supply Voltage = +5 V, 50 Ω System.
2. 3OIP measured with two tones at an output power of 0 dBm/tone separated by 1 MHz. The
suppression on the largest IM3 product is used to calculate the 3OIP using a 2:1 rule.
Absolute Maximum Rating
Parameter Rating
Operating Case Temperature -40 to +85 °C
Storage Temperature -55 to +150 °C
Operation of this device above any of these parameters may cause permanent damage.
Target Performance
Parameter Units Typical
Frequency MHz 50 100 200 500
S21 dB 15.4 14.9 14.7 14.4
S11 dB -12 -13 -13 -12
S22 dB -14 -16 -17 -14
Output P1dB dBm +19 +19 +19 +19
Output IP3 (2) dBm +39 +39 +37.8 +37.8
Noise Figure dB 4.5 4.5 4.6 4.6
Ordering Information
Part No. Description
WJA1515 +5V Active Bias InGaP HBT Gain Block
(lead-free/green/RoHS-compliant SOT-89 Package)
WJA1515-PCB 50 – 1000 MHz Fully Assembled Eval. Board
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 2 of 3 May 2007
WJA1515
+5V Active-Bias InGaP HBT Gain Block
Application Circuit
Recommended Component Values(1)
Ref. Name Value / Type Size
L1 470 nH wire wound inductor 1008
C1, C2 1000 pF chip capacitor 0603
C3 0.018 μF chip capacitor 0603
R1, R2, R4 0 Ω(2) 0603
C4, C5, C6,
R3, R5, R6,
R7, R8
Do Not Place(2)
1. The listed values are contained on the evaluation board to achieve optimal broadband performance
2. Place holders for the 0Ω resistors and “Do Not Place” references are not needed for final design.
C1
Blocking
Capacitor
RF OUT
L1
RF Choke
C3
Bypass
Capacitor
R4
0 Ω
RF IN
C2
Blocking
Ca
p
acito
r
Vcc=+5V
Icc = 65 mA
WJA1515
R1
0 Ω R2
0 Ω
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 3 of 3 May 2007
WJA1515
+5V Active-Bias InGaP HBT Gain Block
Mechanical Information
This package is lead-free/Green/RoHS-compliant. It is compatible with both lead-free (maximum 260 °C reflow temperature) and leaded
(maximum 245 °C reflow temperature) soldering processes. The plating material on the leads is NiPdAu.
Outline Drawing
Land Pattern
Product Marking
The WJA1515 will be marked with an “A1515”
designator with an alphanumeric lot code
marked below the part designator.
Tape and reel specifications for this part are
located on the website in the “Application
Notes” section.
MSL / ESD Rating
ESD Rating: Class 1C
Value: Passes ≥ 1000V min.
Test: Human Body Model (HBM)
Standard: JEDEC Standard JESD22-A114
ESD Rating: Class IV
Value: Passes ≥ 1000V min.
Test: Charged Device Model (CDM)
Standard: JEDEC Standard JESD22-C101
Mounting Config. Notes
1. Ground / thermal vias are critical for the proper
performance of this device. Vias should use a .35mm
(#80 / .0135”) diameter drill and have a final plated thru
diameter of .25 mm (.010”).
2. Add as much copper as possible to inner and outer layers
near the part to ensure optimal thermal performance.
3. Mounting screws can be added near the part to fasten the
board to a heatsink. Ensure that the ground / thermal via
region contacts the heatsink.
4. Do not put solder mask on the backside of the PC board in
the region where the board contacts the heatsink.
5. RF trace width depends upon the PC board material and
construction.
6. Use 1 oz. Copper minimum.
7. All dimensions are in millimeters (inches). Angles are in
degrees.
