max2645eubt Maxim Integrated Products, Inc., max2645eubt Datasheet - Page 11

• Manufacturer Part Number: max2645eubt
• Description: Max2645 3.4ghz To 3.8ghz Sige Low-noise Amplifier/pa Predriver
• Manufacturer: Maxim Integrated Products, Inc.

Figure 1. Typical Application Circuit
Figure 2. Typical System Application Block Diagram
______________________________________________________________________________________
DUPLEXER
LOW NF
MAX2645
LNA
PA
3.4GHz to 3.8GHz
RF INPUT
PA PREDRIVER
Low-Noise Amplifier/PA Predriver
*
HIGH IP3
BOARD THICKNESS = 0.012in, DIELECTRIC CONSTANT = 3.8
BOARD MATERIAL = GETek, COPPER THICKNESS = 1 oz
MAX2645
MAX2645
220pF
LNA, LOW NF
LNA, HIGH INPUT IP3
PA PREDRIVER
APPLICATION CIRCUIT
LNA
Z1
IMAGE-REJECT
C1
BANDPASS
2
3
4
1
5
FILTER
FILTER
R
BIAS
RF
RF
GND
GND
GND
RFIN
BIAS
MAX2645
RF
SHDN
GAIN
GND
1000pF
0.01 F
V
OUT
1.5pF
CC
C1
MAX2683
MAX2684
MAX2683
MAX2684
3.4GHz to 3.8GHz SiGe
9
8
8
7
0.75pF
0.75pF
1.8nH
L
EQUIV
0.75pF
Z1
47pF
T
LINE
BANDPASS
= 1.5nH
HIGH GAIN
LOW GAIN
ON
OFF
FILTER
R
TRANSMIT
IF INPUT
BIAS
RADIAL STUB
IF
RF
OUTPUT
20
20
15
(k )
40
RECEIVE
IF OUTPUT
V
*
CC
3.3
3.3
5.0
0.1 F
(V)
V
1000pF
V
CC
CC
LO BUFFER
LO BUFFER
MAX2645
MAX2645
LO
LO
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