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STPAC01 Datasheet

  • STPAC01

  • RF DETECTOR FOR POWER AMPLIFIER CONTROL

  • 6頁

  • ETC

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STPAC01F1
IPAD
TM
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:
V
DCout
= 0.88 V at 0.85 GHz at 10 dBm
V
DCout
= 1.07 V at 1.85 GHz at 10 dBm
Vsupply = 5 V max.
s
s
s
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
Flip-Chip package
PIN CONFIGURATION (ball side)
3
DC
out
Gnd1
RFin
2
V
Temp
Gnd1
Gnd1
1
A
Gnd2
Bias
B
C
The use of IPAD technology allows the RF
front-end designer to save PCB area and to
drastically suppress parasitic inductances.
FUNCTIONAL DIAGRAM
Coupler
V
BIAS
RF input
RF detector
Low pass
filter
Thermal
compensation
STPAC01F1
GND1
GND2
V
DCOut
V
temp
TM
: IPAD is a trademark of STMicroelectronics.
January 2003 - Ed: 1
1/6

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