2.4GHz to 2.5GHz 802.11g/b RF Transceiver, PA,

and Rx/Tx/Antenna Diversity Switch

18

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B2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

B6

GNDRXLNA

ANT1+

ANT1-

B7

ANT2+

ANT2-

SHDN

POWER DETECTOR

SERIAL

INTERFACE

TEMP

SENSOR

AM

DETECTOR

RXBBQ+

RXBBQ-

RX Q

OUTPUTS

RX/TX GAIN

CONTROL

B4

BYPASS

TUNE

GNDVCO

CTUNE

XTAL

PLL

%1,2

%1,2

GNDCP

SERIAL INPUTS

MAX2830

MODE

CONTROL

RX/TX GAIN

CONTROL

RX/TX GAIN

CONTROL

REFERENCE

CLOCK BUFFER

OUTPUT

NOTE: ALL GROUND PINS (PINS 2, 26, AND 31) AND BYPASS CAPACITORS’ GROUND REQUIRE THEIR OWN VIAS TO GROUND.

DO NOT CONNECT THEM TO THE EXPOSED PADDLE GROUND.

RX BASEBAND HPF

CORNER FREQUENCY

CONTROL

B3

RX/TX

GAIN CONTROL

RX INPUT

TX OUTPUT

MODE CONTROL

RX/TX GAIN

CONTROL

RX/TX GAIN

CONTROL

RX GAIN

CONTROL

TX INPUT

RX I OUTPUTS

0

°

90

°

RSSI

MUX

TO RSSI

MUX

RSSI

TEMP

SENSOR

CRYSTAL

OSCILLATOR/

BUFFER

RSSI

TO

RSSI

MUX

MUX

IMUX QMUX

MUX

Block Diagram/Typical Operating Circuit