CDQ0303-QS
Advanced Product Information
500 MHz to 6000 MHz
Dual, Ultra Low-Noise,
High IP3 Amplifier
May 2005 V1.0
(1 of 18)
Features
❏ Matched Pair of Transistors for Optimum
Ballanced Amplifier Design
❏ AlGaAs/InGaAs/AlGaAs pseudomorphic
High Electron Mobility Transistor (pHEMT)
❏ High Gain:
25 dB @ 900 MHz
21 dB @ 1900 MHz
❏ Low Noise Figure:
0.6 dB @ 900 MHz,
0.7 dB @ 1900 MHz
❏ 17 dBm P1dB at 2 GHz
❏ 33 dBm OIP3 at 2 GHz
❏ 600µm Gate Width: 50Ω Output Impedance
❏ Excellent Uniformity
❏ Ultra Compact Surface-Mount QFN Package
❏ Lead Free Construction
❏ 10 Year MTBF Lifetime
❏ Excellent Uniformity
Typical Specifications (50 Ω System)
Parameter
900 MHz 1900 MHz 2400 MHz
Units
dB
S21 Gain
23.5
-3.0
-3.5
31.8
16.5
0.55
50
20.0
-4.0
-4.5
32.5
16.0
0.72
50
16.0
-3.0
-7.0
32.7
16.0
0.89
50
S11 Input Return Loss
S22 Output Return Loss
Output IP3
dB
Applications
dB
❏ Low Noise amplifiers and Oscillators
Operating over the RF and Microwave
Frequency Ranges
dBm
dBm
dB
Output P1 dB
Noise FIgure
❏ Cellular/PCS/GSM/W-CDMA
❏ Mobile Handsets, Base station Receivers and
Tower-Mount Amplifiers
Operating Current Range
Supply Voltage
mA
V
3.0
3.0
3.0
❏ WiMAX WLAN, LEO, GEO, WLL/RLL,
GPS and MMDS Applications
❏ General Purpose Discrete pHEMT for Other
Ultra Low-Noise and Medium Power
Applications
Note: Typical specifications represents performance for each side of
the matched pair of transistors in the recommended application circuit
board (see page 15). It is anticipated that the pair will be used in a bal-
anced circuit configuration, hence the matches are optimized for best
noise figure and OIP3 performance.
frequency range. It can also be used in a dual-band configu-
ration where a single transistor is used for each band.
Description
The CDQ0303-QS is a dual, ultra low-noise amplifi-
er combining high gain, state-of-the-art noise figure and high
IP3. Utilizing Celeritek’s distinctive in-house GaAs fabrica-
tion advantage and matched pair technology, co-located
matched transistor die are assembled in the 4mm x 4mm
QFN package. The low-cost, surface-mount, 16 terminal,
plastic package is also lead-free.
Celeritek’s high performance packaged pHEMTs are
ideal for use in all applications where low-noise figure, high
gain, medium power and good intercept is required. The
CDQ0303-QS is the perfect solution for the first or second
stage of a base station LNA due to the excellent combination
of low-noise figure and linearity. It is also well suited as a
medium power driver stage in pole-top amplifiers and other
transmit functions, particularly as the low thermal resistance
allows extended power dissipation when voltage and current
are adjusted for increased power and linearity.
Packaging a matched pair of ultra low-noise devices
in a single package makes the CDQ0303-QS an ideal product
for balanced amplifier implementation. It is intended for
many applications operating in the 900 MHz to 2400 MHz
3236 Scott Boulevard
Santa Clara, California 95054
Phone: (408) 986-5060
Fax: (408) 986-5095
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