CHP0205-QM
Advanced Product Information
July 2002
(1 of 4)
Features
❏
InGaP HBT Technology
❏
4mm Square, 50 Ohm Power Module Package
❏
Single Positive Supply
❏
36% Linear Power Added Efficiency
❏
+28.0 dBm Output Power (CDMA 2K)
❏
29 dB Gain at Operating Output Power
❏
On-Board Power Down Mode
❏
Lower RF Power Efficiency Enhancement
Applications
❏
Cellular Multi-Mode Handsets
❏
Cellular Infrastructure
❏
Wireless Local Loop Subscriber Units
❏
CDMA Handsets
❏
CDMA2K 1X Handsets
Description
The CHP0205-QM is a 50 ohm matched, single sup-
ply, linear power amplifier module intended for use in cellular
handsets and wireless local loop subscriber units. The highly
integrated amplifier meets the requirements of CDMA and
CDMA2K 1X systems. It is a member of Celeritek’s new
QuadAmps™
family of 3V power amplifier modules that
are packaged in a low-cost, space efficient, 4mm square,
matched module that provides excellent electrical stability and
824 to 849 MHz
28.0 dBm, Cellular
InGaP HBT Amplifier Module
Functional Block Diagram
Vref
1
Vcntrl
2
GND
3
RF IN
4
Vcc1
5
10
GND
BIAS
9
GND
8
RF OUT
7
GND
6
Vcc2
Ground connection: pins 3,
6, 9, 10 and on backside
low thermal resistance. The module operates from a fixed pos-
itive voltage and requires no external matching which signifi-
cantly reduces space, cost and enhances ease of use. A current
adjustment pin (Vcntrl) is provided to improve efficiency for
the low RF power range of operation.
The 4x4 mm package is self contained, incorporating
50 ohm input and output matching networks optimized for
output power, linearity and efficiency.
Celeritek’s InGaP HBT technology offers a thermally
robust and reliable PAM (power amplifier module) solution.
Absolute Maximum Ratings
Parameter
Rating
Parameter
Rating
Parameter
Rating
Collector Voltage (+Vcc)
Collector Current (Icc)
RF Input Power (High Mode)
RF Input Power (Low Mode)
* RF Off.
+6.0 V*
1.2 A
7 dBm
13 dBm
Reference Voltage (Vref)
Power Dissipation
Vcntrl
+3.1 V
4W
+3.1 V
Operating Temperature
Storage Temperature
Soldering Temperature
-30°C to +95°C
-55°C to +135°C
260°C for 5 Sec.
Recommended Operating Conditions
Parameter
Typ
Units
Parameter
Typ
Units
Collector Voltage (+Vcc)
Reference Voltage (Vref)
(Fixed and regulated)
3.2 to 4.2
+3.0 (±0.1V)
Volts
Volts
Operating Temperature (PC Board)
Control Voltage (Vcntrl)
High
Low
-20 to +70
2.5-3.0
0-0.5
°C
V
V
Application Information
The CHP0205-QM is a two-stage amplifier that requires a
single regulated positive supply along with the unregulated bat-
tery voltage for proper operation. Vref is a regulated 3.0 refer-
ence voltage for the bias control circuitry. It can also be used as
a power down mode select. Vcc is an unregulated supply volt-
age directly from the battery. Vcc should be applied prior to
Vref and before RF input power. Vcntrl is a control voltage
selection between high and low power mode. The CHP0205-
QM can be operated over a range of supply voltages and bias
points by adjustment of Vref. It is important that the maximum
power dissipation of the package be observed at all times and
that the maximum voltage across the device is not exceeded.
3236 Scott Boulevard
Santa Clara, California 95054
Circuit Design Considerations
Biasing
The positive Vcc supply voltages are applied to pins
5 and 6. Most bypass decoupling is provided on-board. Vref is
applied to pin 1.
The recommended DC bypass capacitance is shown in the
schematic diagram on Page 2.
Inadequate bypass capacitance and inductance around the
DC supply lines can compromise the adjacent channel power
ratio (ACPR), reduce power gain and/or create oscillations.
– Continued on Page 2 –
Phone: (408) 986-5060
Fax: (408) 986-5095
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