Philips Semiconductors
DCS/PCS 2 W power amplifier
Preliminary specification
CGY2021G
FEATURES
• Power Amplifier (PA) overall efficiency 50% (DCS)
• 34 dB gain
• 0 dBm input power
• Gain control range >50 dB
• Integrated power sensor driver
• Low output noise floor of PA <−121 dBm/Hz in
DCS/PCS RX band
• Wide operating temperature range −20 to +85 °C
• LQFP 48-pin package
• Compatible with power ramping controller PCA5077 and
GaAs PA power modulator UBA1710.
GENERAL DESCRIPTION
The CGY2021G is a DCS/PCS class 1 GaAs Monolithic
Microwave Integrated Circuit (MMIC) power amplifier
specifically designed to operate at 4.8 V battery supply.
The chip also includes a power sensor driver so that no
directional coupler is required in the power control loop.
The PA requires only a simple low-pass filter to comply
with the DCS/PCS transmit spurious specification. It can
be switched off and its power controlled by monitoring the
actual drain voltage applied to the amplifier stages.
APPLICATIONS
• Hand-held transceivers for DCS/PCS applications
(DCS: 1710 to 1785 MHz and PCS:
1850 to 1910 MHz)
• 1800 MHz Time Division Multiple Access (TDMA)
systems.
QUICK REFERENCE DATA
SYMBOL
PARAMETER(1)
MIN.
VDD
positive supply voltage
−
IDD
positive peak supply current
−
Po(max)
maximum output power
−
Tamb
operating ambient temperature
−20
Note
1. For conditions, see Chapters “AC characteristics” and “DC characteristics”.
TYP.
4.5
1.4
34
−
MAX.
−
−
−
+85
UNIT
V
A
dBm
°C
ORDERING INFORMATION
TYPE
NUMBER
CGY2021G
PACKAGE
NAME
DESCRIPTION
LQFP48 plastic low profile quad flat package; 48 leads; body 7 × 7 × 1.4 mm
VERSION
SOT313-2
1997 Apr 03
2