SE2525L

RangeCharger™ 2.4GHz Power Amplifier with Power Detector

Preliminary Information

28-DST-01 Rev 2.1 Apr-25-2006

Confidential

1 of 12

QA042506

Applications

DSSS 2.4GHz WLAN (IEEE802.11b)

OFDM 2.4GHz WLAN (IEEE802.11g)

Access Points, PCMCIA, PC cards

Features

+19 dBm, EVM = 2.7%, 802.11g, OFDM 54 Mbps

+23 dBm, ACPR < -32 dBr, 802.11b

Selectable integrated external or internal coupled

temperature compensated power detector

Selectable Power Detector Slope for use with

multiple chipsets (Negative and Positive)

Single supply voltage: 2.7 to 3.6 V

Lead free and RoHS Compliant

Small plastic package, 16 pin 4 mm x 4 mm QFN

Ordering Information

Type

Package

Remark

SE2525L

16 Pin QFN

Samples

SE2525L-R

16 Pin QFN

Tape and Reel

SE2525L-EK1

Evaluation Kit

Standard

Product Description

The SE2525L is a 2.4GHz power amplifier designed

for use in the 2.4GHz ISM band for wireless LAN

applications. The device incorporates two selectable

power detectors for closed loop monitoring of the

output power.

For wireless LAN applications, the device meets the

requirements of 802.11g and delivers +19 dBm, at an

EVM of 2.7% and current of 160 mA @ 3.3 V.

The SE2525L‘s bias architecture provides for lower

current consumption at lower output power levels.

minor customization of the bias current for power

saving at lower output powers.

The SE2525L includes a digital enable control for

device on/off control.

The SE2525L has two selectable power detectors.

The internally coupled signal is selected by grounding

the second stage improving the accuracy under

output mismatch conditions. The second detector

uses an external RF input pin which would typically be

taken from a directional coupler output. Both

detectors are temperature compensated for minimum

component count and high accuracy. Each of these

power detectors also have selectable positive and

negative slopes for ease of use with all chipsets.

Please note this device is not recommended for

new designs.

SiGe’s SE2528L is a pin for pin

compatible device and can be used in existing

SE2525L application boards with only component

value changes. Application notes are available to

assist in the change.

Functional Block Diagram

IN

Stage 2

Stage 1

Stage 3

Bias Generator

Detector

(with Switch)

Figure 1: Functional Block Diagram