STPAC01F2 Datasheet, PDF (1/7 Pages) STMicroelectronics – RF DETECTOR FOR POWER AMPLIFIER CONTROL

®
IPAD™
STPAC01F2
RF DETECTOR FOR
POWER AMPLIFIER CONTROL
MAIN PRODUCT CHARACTERISTICS
The STPAC01F2 has two outputs, one for the sig-
nal 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
■ Lead free package
DESCRIPTION
The STPAC01F2 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 temper-
ature 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
800 MHz to 1900 MHz frequency ranges.
BENEFITS
■ The use of IPAD technology allows the RF
front-end designer to save PCB area and to
drastically suppress parasitic inductances.
Flip-Chip
(8 Bumps)
Table 1: Order Code
Part Number
STPAC01F2
Marking
RA
Figure 1: Pin Configuration (Ball side)
3
2
1
DC
out
V
Temp
A
Gnd1 Gnd1 Gnd2 B
RFin Gnd1 Bias C
Figure 2: Functional diagram
Coupler
RF input
VBIAS
RF detector
Low pass
filter
Thermal
compensation
STPAC01F2
VDCOut
Vtemp
GND1
GND2
October 2004
REV. 1
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