STPAC01F1 Datasheet, PDF (1/6 Pages) STMicroelectronics – RF DETECTOR FOR POWER AMPLIFIER CONTROL

®
IPAD^TM
STPAC01F1
RF DETECTOR FOR
POWER AMPLIFIER CONTROL
MAIN PRODUCT CHARACTERISTICS
The STPAC01F1 has two outputs, one for the
signal detection and another one for the
temperature compensation:
s V_DCout = 0.88 V at 0.85 GHz at 10 dBm
s V_DCout = 1.07 V at 1.85 GHz at 10 dBm
s Vsupply = 5 V max.
DESCRIPTION
The STPAC01 is an integrated RF detector for the
power control stage. It converts RF signal coming
from the coupler into a DC signal usable by the
digital stage. It is based on the use of two similar
diodes, one providing the signal detection while
the second one is used to provide a temperature
information to thermal compensation stage. A
biasing stage suppresses the detection diode drop
voltage effect.
Target applications are cellular phones and PDA
using GSM, DCS, PCS, AMPS, TDMA , CDMA
and 800MHz to 1900MHz frequency ranges
BENEFITS
s The use of IPAD technology allows the RF
front-end designer to save PCB area and to
drastically suppress parasitic inductances.
Flip-Chip package
PIN CONFIGURATION (ball side)
3
2
1
DC
out
V
Temp
A
Gnd1 Gnd1 Gnd2 B
RFin Gnd1 Bias C
FUNCTIONAL DIAGRAM
Coupler
RF input
RF detector
VBIAS
Low pass
filter
Thermal
compensation
STPAC01F1
VDCOut
Vtemp
GND1
GND2
TM : IPAD is a trademark of STMicroelectronics.
January 2003 - Ed: 1
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