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MAIN PRODUCT CHARACTERISTICS

The STPAC01F2 has two outputs, one for the sig-

nal detection and another one for the temperature

compensation:

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

front-end designer to save PCB area and to

drastically suppress parasitic inductances.

STPAC01F2

RF DETECTOR FOR

POWER AMPLIFIER CONTROL

REV. 1

October 2004

IPAD™

Flip-Chip

(8 Bumps)

Table 1: Order Code

Part Number

Marking

STPAC01F2

RA

Figure 1: Pin Configuration (Ball side)

Gnd1

RFin

Gnd1

Gnd1

Gnd2

Bias

DC

out

V

Temp

32

1

A

B

C

Figure 2: Functional diagram

Coupler

GND2

GND1

STPAC01F2

RF input

Thermal

compensation

Low pass

filter

RF detector