ML2724 datasheet(1/26 Pages) MICRO-LINEAR

No de pièce	ML2724

Description	2.4GHz Low-IF 1.5Mbps FSK Transceiver Final Datasheet

PDF	26 Pages

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Fabricant	MICRO-LINEAR [Micro Linear Corporation]

Site Internet	http://www.microlinear.com

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ML2724

2.4GHz Low-IF 1.5Mbps FSK Transceiver

Final Datasheet

GENERAL DESCRIPTION

The ML2724 is a fully integrated 1.5Mbps frequency

shift keyed (FSK) transceiver that operates in the

unlicensed 2.4GHz ISM frequency band. The device

has been optimized for digital cordless telephone

applications and includes all the frequency generation,

receive and transmit functions. Automatically adjusted

filters eliminate mechanical tuning. Closed loop

modulation eliminates frequency drift and permits

practically unlimited TX duration. The transmitter

generates a 3dBm FSK output signal.

The 1.5Mbps data rate permits data spreading, such as

Direct Sequence Spread Spectrum (DSSS) modulation,

which improves range. The dual conversion Low-IF

receiver has all of the sensitivity and selectivity

advantages of a traditional super-heterodyne without

requiring costly, bulky external filters, while providing

the integration advantages of direct conversion.

The phase locked loop (PLL) synthesizer is completely

integrated, including the voltage controlled oscillator

(VCO), tuning circuits, and VCO resonator. This allows

the ML2724 to be used in frequency hopped spread

spectrum (FHSS) applications.

The ML2724 contains internal voltage regulation. It

also contains PLL and transmitter configuration

registers. The device can be placed in a low power

standby mode for current sensitive applications. It is

packaged in a 32TQFP.

PIN CONFIGURATION

ORDERING INFORMATION

PART #

TEMP RANGE

PACKAGE

SPEC

ML2724DH -10

oC to +60 oC

32 Pin TQFP 7mmx7mm

DS2724-F-01

FEATURES

Complete 2.4GHz FSK Transceiver

- High data rate (1.5Mbps)

- -90dBm sensitivity (DSSS modulation)

- 3dBm Output Power (differential, typical)

Closed Loop TX Modulation

Low IF Receiver: No external IF filters required.

Fully Integrated frequency synthesizer:

- No external resonator required.

Sigma-Delta Fractional-N two-port modulator

Automatic Filter Alignment

- No manufacturing adjustments required.

No external data slicer components required

Control outputs correctly sequence and control PA

3-wire control interface

Analog RSSI output

APPLICATIONS

2.4GHz FSK Data Transceivers

- Digital Cordless Telephones

- Wireless PC Peripherals

- Wireless Game Controllers

VCCA

RVLO

TXOB

TXO

GNDRXMX2

GNDRXMX

GNDRF

RXI

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

32 31 30 29 28 27 26 25

24

23

22

21

20

19

18

17

XCEN

RXON

PAON

EN

DATA

CLK

AOUT

VSS

- Wireless Streaming Media

BLOCK DIAGRAM

Filter

Alignment

PLL

Divider

TXO/TXOB

2.4 GHz

Output

Quadrature

Downmixers

Quadrature

Divider

1.6 GHz

VCO

PLL Loop

Filter

DOUT

Receive Data

Out

DIN

Transmit Data In

Ref.

Divider

Control

Registers

Serial

Control Bus

RSSI

P.D.

FREF

Frequency

Reference

Mode

Control

Parallel

control lines

Divide

by 2

Two-port

Modulator

F

to

V

RSSI

RXI

2.4 GHz

Receive Input

Test Mux

TPC

PAON

RXON

XCEN

DATA

CLK

EN

VTUNE

QPO

Transmit

Mixer

Bandgap

2

AOUT

DS2724-F-01

APRIL 2003

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