SN761677

SLES066A – DECEMBER 2002

www.ti.com

13

APPLICATION INFORMATION

VLOOSCC

OSCGND

VHIOSCB

R2

C6

L1

L3

L4

L2

VC3

VC2

R30

C4

C12

C11

C10

C9

C8

C7

C38

C37

C36

C5

R1

C3

VC1

C50

C1

C2

VHIOSCC

UHFOSCB1

UHFOSCC1

UHFOSCC2

IFOUT2

IFOUT1

IFGND

UHFOSCB2

VCC

CP

VTU

XTAL

BS1

UHFRFIN2

UHFRFIN1

VHFRFIN2

VHFRFIN1

RFGND

MIXOUT2

MIXOUT1

BS2

BS3

BS4

P5

AS

AS

ADC

P6

SDA

SDA

SCL

SCL

VLOOSCB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

19

38

37

36

35

34

33

32

31

30

29

28

27

25

24

23

22

C13

C24

C17

URF1

URF2

VRF1

LB

Vcc:5V

IF OUT1

VRF2

C65

C20

C18

C64

C21

C16

C14

R8

R21

C39

R10

R4

R5

X1

R7

L9

L10

R16

R17

C33

C34

P7

P8

21

20

TUVCC

TUGND

VDC

16

17

18

C101

R101

TUVcc:5V

C19

C23

C35

TUGND

C201

R201

VDC

UB

HB

R19

R18

R31

(1) It is recommended that designers be careful with the PCB layout and coupling to minimize the effects of the higher harmonics of Xtal oscillation

from the dc/dc converter section (pin 16–20) to mixer and oscillator section.

Figure 2. Reference Measurement Circuit