Micro Linear makes no representations or warranties with respect to the accuracy, utility, or completeness of the contents of this publication and reserves the right to make changes to specifications and product

descriptions at any time without notice. No license, express or implied, by estoppel or otherwise, to any patents or other intellectual property rights is granted by this document. The circuits contained in this

document are offered as possible applications only. Particular uses or applications may invalidate some of the specifications and/or product descriptions contained herein. The customer is urged to perform its

own engineering review before deciding on a particular application.

Micro Linear assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Micro Linear

products including liability or warranties relating to merchantability, fitness for a particular purpose, or infringement of any intellectual property right. Micro Linear products are not designed for use in medical,

The 2.4GHz radio chipset is targeted at the IEEE802.11 Frequency Hopping Spread Spectrum

standard. Two devices; ML2712 2.4GHz RF Transceiver and the ML2713 IF Transceiver implement

a very highly integrated, easy to use radio with a low cost bill of materials. The transmit path

includes a DAC and IF up converter in the ML2713 followed by an integrated transmit PLL, 2.4GHz

mixer and directly modulated VCO in the ML2712. The result is accurate digital generation of

the modulated signal for 802.11 compatibility and maintenance of adequate transmitter range even

without RF bandpass filters. The dual conversion receiver features high dynamic range and support

for the 4G FSK/2Mbps requirement of 802.11 standard. The chipset also inplements a self aligning

descriminator adjusted with every frequency hop.

An optional ML2731 PA Bias Controller completes the set.

CORPORATE HEADQUARTERS

WESTERN UNITED STATES

Micro Linear Corporation

2092 Concourse Drive

San Jose, CA 95131

Tel: (408) 433-5200

Fax: (408) 432-1627

http//www.microlinear.com

CENTRAL UNITED STATES

Micro Linear Corporation

59 Cardinal Street

Pearl River, NY 10965

Tel: (914) 735-5848

Fax: (914) 735-5852

EASTERN UNITED STATES

Micro Linear Corporation

35 Pinehurst Avenue

Nashua, NH 03062

Tel: (603) 888-1326

Fax: (603) 888-4239

EUROPE

Micro Linear Corporation

Babraham Road

Sawston, Cambridge

CB2 4LJ, UK

Tel: 44-1223-839534

Fax: 44-1223-836761

ASIA

Micro Linear Corporation

#705 2-8-12 Mita

Minato-ku, Tokyo 108-0073

Tel/Fax: +81-3-5439-6256

Transmit

Power

Amplifier

R. C.

Loop

Filter

LPF

+

–

DAC

2LO VCO

1LO VCO

x2

Tx Regulator

Output

2LO Loop

Filter &

Tank Circuit

1LO Loop

Filter &

Tank Circuit

32MHz

Clock

Reference

Frequency

Input

RSSI

Input

ML2712

WB Charge

Pump/WB

Phase Comp

PLL 1

PLL 2

DC

Reg

Quad &

Filter

Auto Align

Discrim-

inator

+

–

DAC

Data Filter

Rx Out

D/A Input

Control

Interface

ML2713

DC

Restore

Image Reject Rx IF

Downconverter

Image Reject Tx

IF Upconverter

Tx Regulator

Output

RSSI

Limiter

MUX

Voltage

Regulator

REGO

Bias Control

VPA

VBIAS

Crystal

Oscillator

VNEG

Negative voltage

generator

C1

PA on/off switch

and current sense

Sine & square

wave drivers

PDN

Crystal

XOUT

XIN

PAEN

NEGEN

ICON

C2

Baseband

IC

CLKO

SINO

ML2731

Lock

Detect

Control

Circuits

Block Diagram

© 2000 Micro Linear Corporation. All Rights Reserved.

10k

0200

PB2712-01

2.4GHz FHSS Radio Chipset