WJA1025
Product Features
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Cascadable gain block
50 – 4000 MHz
17 dB Gain @ 1.9GHz
+15.5 dBm P1dB @ 1.9GHz
+32 dBm OIP3 @ 1.9GHz
Operates from +5V @ 60mA
Robust 1000V ESD, Class 1C
RoHS-compliant SOT-89 package
+5V Active-Bias InGaP HBT Gain Block
Product Description
The WJA1025 is a cascadable gain block that offers high
linearity in a low-cost surface-mount package. At 1.9 GHz,
the WJA1025 typically provides 17 dB gain, +32 dBm
OIP3, and +15.5 dBm P1dB. The device is housed in a
RoHS-compliant SOT-89 industry-standard SMT package
using a NiPdAu plating to eliminate the possibility of tin
whiskering.
Functional Diagram
GND
4
1
2
GND
3
RF OUT
Applications
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Wireless Infrastructure
General Purpose
Cellular GSM, PCS, UMTS
W-CDMA
,
TD-SCDMA
,
WiMAX
The WJA1025 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 a bias inductor for
operation. An internal active bias is designed to enable
stable performance over temperature. A dropping bias
resistor is not required allowing the device to be biased
directly from a +5V supply voltage.
The broadband amplifier can be directly applied to various
current and next generation wireless technologies such as
GSM, CDMA, W-CDMA, WiBro, and WiMAX. The
WJA1025 is ideal for general purpose applications such as
LO buffering, IF amplification and pre-driver stages within
the 50 to 4000 MHz frequency range.
RF IN
Function
Input
Output/Bias
Ground
Pin No.
1
3
2, 4
Specifications
(1)
Parameter
Operational Bandwidth
Test Frequency
Gain
Input Return Loss
Output Return Loss
Output P1dB
Output IP3
(2)
Output IP2
Noise Figure
Device Voltage
Device Current
Typical Performance
(3)
Units
MHz
MHz
dB
dB
dB
dBm
dBm
dBm
dB
V
mA
Min
50
Typ
1900
17
15
10
+15.6
+32.4
+41
5.5
5
60
Max
4000
Parameter Units
Frequency
S21
S11
S22
Output P1dB
Output IP3
(2)
Output IP2
Noise Figure
MHz
dB
dB
dB
dBm
dBm
dBm
dB
500
18.9
-14
-18
+18.2
+34.7
+47.1
4.8
900
18.4
-16
-14
+17.3
+33
+45.4
5.0
Typical
1900
16.8
-37
-10
+15.6
+31.9
+41
5.5
2140
16.2
-31
-10
+14.8
+31.5
+39.7
5.6
2500
15.4
-27
-13
+13.5
+30.6
+36.4
6.0
3. Listed typical performance parameters measured on evaluation board.
1. Test conditions: 25 ºC, Supply Voltage = +5 V, 50
Ω
System. S-parameters and 3OIP measured at
device pins. All other specifications measured on evaluation board.
2. 3OIP measured with two tones at an output power of 2 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
Storage Temperature
Supply Voltage
Input Power
θ
jc
(junction to paddle)
Maximum Junction Temperature
-55 to +150
°C
+6.5 V
+24 dBm
83.8
°C
/ W
150
°C
Rating
Ordering Information
Part No.
WJA1025
WJA1025-PCB
Description
+5V Active Bias InGaP HBT Gain Block
(lead-free/green/RoHS-compliant SOT-89 Package)
50 – 4000 MHz Fully Assembled Eval. Board
Operation of this device above any of these parameters may cause permanent damage.
Standard tape / reel size = 1000 pieces on a 7″ reel
Specifications and information are subject to change without notice
Page 1 of 4
Dec 2007
WJ Communications, Inc
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Phone 1-800-WJ1-4401
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FAX: 408-577-6621
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e-mail: sales@wj.com
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Web site: www.wj.com
WJCI [ WJ COMMUNICATION. INC. ]
