GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
GSM INPUT
(925MHz TO 960MHz)
DCS INPUT
(1805MHz TO 1880MHz)
LOGIC-LEVEL
SHUTDOWN CONTROL
LOGIC-LEVEL
GAIN CONTROL
VCC
910Ω
910Ω
6.8nH
5.6pF
220pF
68pF
47pF
1.1pF
3.3nH
220pF
910Ω
1
SHDN
10
GAIN
MAX2652
240Ω
220pF
2
GSMIN
9
GSMOUT
VCC
3
GND
8
VCC
10µF
4
DCSIN
7
DCSOUT
5
BAND
6
GND
1µF
LOGIC-LEVEL
BAND CONTROL
100pF
8.2nH
C9
2.2pF
1.2pF
2.2nH
220pF
VCC
Figure 2. MAX2652 Typical Application Circuit
GSM
OUTPUT
DCS
OUTPUT
LOGIC-LEVEL
SHUTDOWN CONTROL
LOGIC-LEVEL
GAIN CONTROL
DCS INPUT
(1805MHz TO 1880MHz)
1k
100pF
2200pF
1.5pF
3.3nH
MAX2653
1
SHDN
8
GAIN
VCC
2
GND
7
VCC
3
DCSIN
6
DCSOUT
1k
100pF
200pF
1.0pF
(0.8pF*)
4
GND
5
GND
330Ω
(510Ω*)
2.7nH
(2.2nH*)
47pF
VCC
* FOR OPTIMUM PCS-BAND (1930MHz TO 1990MHz) PERFORMANCE, USE THESE COMPONENTS.
Figure 3. MAX2653 Typical Application Circuit
DCS
OUTPUT
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