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 4 January 2008
WJA1001
+5V Active-Bias InGaP HBT Gain Block
Product Features
50 – 3000 MHz
19 dB Gain @ 900MHz
+20 dBm P1dB @ 900MHz
+45 dBm OIP3 @ 900MHz
+5V Single Supply
Low current draw (100 mA)
Unconditionally stable
Internally matched to 50
Robust 1000V ESD, Class 1C
Lead-free/green/RoHS-compliant
SOT-89 package
Applications
GSM, PCS, CDMA, WCDMA
WiMAX, WiBro
Repeaters, BTS Transceivers
RFID
Product Description
The WJA1001 is a cascadable gain block that offers high
linearity in a low-cost surface-mount package. At 900 MHz,
the WJA1001 typically provides 19 dB gain, +45 dBm OIP3,
and +20 dBm P1dB. The device is housed in a lead-
free/green/RoHS-compliant SOT-89 SMT package using a
NiPdAu plating to eliminate the possibility of tin whiskering.
The WJA1001 consists of a Darlington-pair amplifier using
a high reliability InGaP/GaAs HBT process technology.
The amplifier has been optimized internally to offer very
high linearity performance at 1 GHz while drawing very
low current. 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 and allow
for operation 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
WJA1001 is ideal for general purpose applications such as
LO buffering or amplification and pre-driver stages within
the 50 to 3000 MHz frequency range.
Functional Diagram
RF IN GND
GND
12 3
4
Function Pin No.
Input 1
Output/Bias 3
Ground 2, 4
Specifications (1)
Parameter Units Min Typ Max
Operational Bandwidth MHz 50 3000
Test Frequency MHz 900
Gain dB 19
Input Return Loss dB 12
Output Return Loss dB 14
Output P1dB dBm +19.7
Output IP3 (2) dBm +44.5
Noise Figure dB 5.4
Device Voltage V 5.0
Device Current mA 100
1. Test conditions: 25 ºC, Supply Voltage = +5 V, 50 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 +8 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
Storage Temperature -55 to +150 C
Supply Voltage +6.5 V
Input Power +24 dBm
θjc (junction to paddle) 80.6 C / W
Maximum Junction Temperature 150 C
Operation of this device above any of these parameters may cause permanent damage.
Typical Performance (3)
Parameter Units Typical
Frequency MHz 200 500 900 1900 2100
S21 dB 19.6 19.2 18.5 16.7 16.4
S11 dB -13 -15 -18 -30 -26
S22 dB -22 -20 -15 -11 -12
Output P1dB dBm +20.4 +20.3 +19.7 +19.2 +18.1
Output IP3 (2) dBm +39.7 +39 +44 +34 +34
Noise Figure dB 4.8 5.0 5.4 6.1 6.4
3. Listed typical performance parameters measured on evaluation board.
Ordering Information
Part No. Description
WJA1001 +5V Active Bias InGaP HBT Gain Block
(lead-free/green/RoHS-compliant SOT-89 Package)
WJA1001-PCB 50 – 3000 MHz Fully Assembled Eval. Board
Standard tape / reel size = 1000 pieces on a 7 reel