Rainbow-electronics MAX2327 Manual do Utilizador descarregar pdf (Página 21)

MAX2320/21/22/24/26/27

Adjustable, High-Linearity,

SiGe Dual-Band LNA/Mixer ICs

______________________________________________________________________________________ 21

7.5k

20k

BUFFERED

LO OUTPUTS

100pF

22pF

100pF

C12

3.9pF

C14

1.5pF

C15

6800pF

C18

1pF

100pF

1.65nH

1pF

PCS DUPLEXER

DIPLEXER

LOGIC INPUTS

FROM

CELLULAR PA

CELLULAR LO

FROM

PCS PA

CELLULAR

DUPLEXER

3.3pF

6800pF

C19

2.7pF

C17

6800pF

C11

3.9pF

2.2pF

C10

1000pF

C13

0.01µF

1000pF

270nH

120nH

LOGIC

INPUT

TO VGA

184MHz

869MHz–894MHz

1930MHz–1990MHz

TO VGA

51Ω

MAX2321

LNAINH

RLNA

LNAOUTL

LNAOUTH

GAIN

LIN

BAND

LNAINL

LOHIN

LOLIN

MIXINH

5.6nH

1.8nH

6.8nH

3.85nH

MIXINL

RBIAS

CDMA+

CDMA-

BUFFEN

FMOUT

LOLOUT

LOHOUT

MAX2321

(DUAL BAND, DUAL VCO INPUTS, LO DOUBLER, DUAL IF OUTPUTS, AND LO BUFFER)

NOTE: THE MAX2321 IS RECOMMENDED FOR

TRIPLE-MODE PHONES.

KEY FEATURE: LO DOUBLER FOR SINGLE VCO

OPERATION.

20k

4.7nH

6800pF

4.7nH

100pF

R11

30Ω

Typical Application Circuits (continued)

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 27 28

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