Typical application circuits – Rainbow Electronics MAX2327 User Manual
Page 20
MAX2320/21/22/24/26/27
Adjustable, High-Linearity,
SiGe Dual-Band LNA/Mixer ICs
20
______________________________________________________________________________________
Typical Application Circuits
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
12
11
R2
R6
7.5k
R4
2k
R1
20k
BUFFERED
LO OUTPUTS
V
CC
C5
100pF
C6
22pF
C7
100pF
C12
3.3pF
C14
1.5pF
C15
6800pF
C18
1pF
C2
100pF
C3
100pF
C4
22pF
C1
100pF
1.65nH
1pF
PCS DUPLEXER
DIPLEXER
LOGIC INPUTS
FROM
CELLULAR PA
CELLULAR LO
PCS LO
FROM
PCS PA
CELLULAR
DUPLEXER
3.3pF
6800pF
V
CC
C19
2.7pF
MAX2320
(DUAL BAND, DUAL VCO INPUTS, AND DUAL IF OUTPUTS)
C17
6800pF
C11
3.3pF
C8
4.7pF
C10
1000pF
C13
0.01
µF
C9
1000pF
L3
560nH
L4
110nH
L5
110nH
R3
LOGIC
INPUT
FM
TO VGA
85MHz
210MHz
869MHz–894MHz
1930MHz–1990MHz
TO VGA
51
Ω
R5
20k
V
CC
NOTE: THE MAX2320 IS RECOMMENDED FOR
HANDSETS THAT OPERATE IN THREE MODES:
PCS-BAND CDMA, CELLULAR-BAND CDMA,
AND CELLULAR-BAND FM.
KEY FEATURES: TWO LO INPUT PORTS FOR
SEPARATE VCOs, TWO LO BUFFER OUTPUT PORTS.
V
CC
51
Ω
9
10
MAX2320
LNAINH
RLNA
LNAOUTL
LNAOUTH
GAIN
LIN
BAND
LNAINL
LOHIN
LOLIN
MIXINH
L6
5.6nH
L1
1.8nH
L2
6.8nH
3.85nH
MIXINL
RBIAS
CDMA+
CDMA-
BUFFEN
V
CC
FMOUT
LOLOUT
LOHOUT
6800pF
4.7nH
R11
30
Ω