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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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ISL3680

Direct Conversion Transceiver

The Intersil ISL3680 is a highly

integrated UHF2 process, direct

conversion transceiver and is part of a

2.4GHz, IEEE802.11b/g compliant radio chipset. The

ISL3680 directly interfaces with Intersil’s ISL3880 Medium

Access Controller with Integrated Baseband processor. The

addition of Intersil’s ISL3980 power amplifier and ISL3090

10GHz VCO completes a WLAN transceiver application.

Pinout

ISL3680 (QFN)

TOP VIEW

Features

• Highly integrated Dual Band RF to baseband solution

• Frequency of operation . . . . . . . . . . . . . . . . 2.4 to 2.5GHz

• Low supply operation . . . . . . . . . . . . . . . . . . . . 2.7 to 3.3V

• Noise figure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4dB

• TX OFDM Output Power . . . . . . . . . . . . . . . . . . . . .-5dBm

• TX I/Q MTPR, PAR=12 . . . . . . . . . . . . . . . . . . . . . . -45dB

• RX Voltage gain . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 74dB

• RX I/Q MTPR, PAR=12, High Gain . . . . . . . . . . . . . -35dB

• TX/RX switching speed . . . . . . . . . . . . . . . . . . . . . . .<1

µS

• Direct simple interface to ISL3880

MLFP Package

• Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No

Leads - Package Outline

• Near Chip Scale Package footprint, which improves PCB

efficiency and has a thinner profile

Applications

• PC card wireless LAN adapters

• High data rate wireless LAN systems targeting

IEEE802.11 b/g standards

• Spread spectrum Dual Band WLAN RF modems

• TDMA or CSMA packet protocol Dual Band radios

• PCI wireless LAN cards

• ISA, ISA PnP WLAN cards

LNA_VCC

LNA_GND

LB_LNA_IN-

LB_SHIELD

LB_LNA_IN+

HB_SHIELD

TX_I+

TX_Q+

TX_Q-

LB_TX_OUT+

LB_TX_OUT-

TX_I-

TX_VCC2

TX_GND

PRE_VDD

LD/RREF

RX_I+

RX_I-

RX_AGC_GND

RX_Q-

RX_Q+

RX_AGC_VCC

1.2V_REF

RX_I

RX_Q

BB_OVLD

LE

PRE_GND

DATA

NC

NC

NC

NC

LB

29

28

27

26

25

24

23

22

21

20

19

31

30

32

18

17

61

60

59

58

57

56

55

54

53

52

51

63

62

64

50

49

HB_SHIELD_2

2

I

Q

2

I

Q

I SELECT

Q SELECT

RX I

TX I

RX Q

TX Q

LB

TX_I

TX_Q

CP

SERIAL INTER.

2

10GHz

LO

REF IN

TX_DET

TX_VCC1

SYNTHESIZER

Ordering Information

PART NUMBER

TEMP. RANGE

PACKAGE

PKG.NO.

ISL3680IR

-40 to 85

64 Ld QFN

L64.9x9

ISL3680IR-TK

Tape and Reel

Data Sheet

March 2003

FN8053