SE2425U

RangeCharger

Preliminary Information

165-DST-01 Rev 1.3 Apr-05-2006

Confidential

1 of 10

QA040506

Applications

Bluetooth

USB dongles, PCMCIA, flash cards, Access Points

Enhanced data rate

Features

Integrated input and inter-stage match

+25 dBm GFSK Output Power

+19.5 dBm 8DPSK Output Power

Ultra low quiescent current: 28 mA

Digital Enable for direct interface to standard

CMOS processors

Mode-control for easy switching between standard

and EDR modes

Gain: 29 dB

3.3 V single supply operation

Ordering Information

Type

Package

Remark

SE2425U

3 x 3 x 0.5 mm QFN

Sample

SE2425U-R

3 x 3 x 0.5 mm QFN

Tape & Reel

SE2425U-EK1

N/A

Evaluation Kit

Product Description

A monolithic, high-efficiency, silicon-germanium power

amplifier IC, the SE2425U is designed for 2.4 GHz

wireless applications, including Bluetooth

basic rate and enhanced data rate applications. It

delivers +25 dBm output power in standard rate GFSK

mode and +19.5 dBm output power in enhanced rate

8DPSK.

The SE2425U provides a digital mode control input for

boosting the linear performance for enhanced data rate

applications.

The SE2425U operates at 3.3 V DC with a peak

efficiency of 43 % in basic rate and 21 % in enhanced

rate mode. The internal bias management allows the

part to only draw 28 mA in Class 2 output power levels.

Output match integrates the high Q inductors to reduce

component count and bill of materials. It uses two

external capacitors to allow for varying loads, such as

switches and filters, in different applications.

The

silicon/silicon-germanium

structure

of

the

SE2425U, and its exposed die-pad package, soldered

to the system PCB, provide high thermal conductivity

and a subsequently low junction temperature. This

device is capable of operating at a duty cycle of 100

percent.

Functional Block Diagram

Input

Match

Inter-

Stage

Match

EN

( 4 )

MODE

( 5 )

VCC0

( 2 )

RF IN

( 1 )

RF OUT

( 7 )

GND

( Paddle )

Inter-

Stage

Match

Digital Bias & Enable Logic

VCC2

( 15 )

VCC1

( 16 )

VCC3

( 14 )

SiGe SE2425U

Figure 1: SE2425U Block Diagram