SXT-289 查看數據表（PDF） - Stanford Microdevices
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SXT-289 Datasheet PDF : 8 Pages
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2140 MHz Application Circuit
Note: Circuit tuned for Output IP3
SXT-289 1800-2500 MHz Power Amplifier
Voltage Feed Resistor Bias Circuit (for > 7V supply)
0.1 µ F
(SIZE A)
18pF
Vs
Rbias
Recommended Bias Resistor Values
Supply
Voltage(Vs)
7V
8V
10V 12V
Rbias (Ohms)
18
27
47
62
Power Rating 0.5W 1.0W 1.5W 2.0W
390 Ω
180 Ω
1000pF
15 nH
15 nH
39pF
Z=50 Ω, 56.7 °
RFin
Rbias
390 Ohms
180 Ohms
39pF
15nH
0.1uF
1000pF
18pF
RFout
15nH
39pF
39pF
SXT-289
2140 MHz Schematic
1.0 pF
SXT-289
1.0pF
STANFORD MICRODEVICES
SOT-89 Eval Board
ECB-101499 Rev A
2140 MHz Evaluation Board Layout
Active Current Feedback Bias Circuit (for 5V supply)
0.1 µ F
(SIZE A)
Vs = 5V
22 pF
220 Ω
6
1000 pF
2
(Rohm)
4
1 UMZ1N 5
1.8K Ω
3
750 Ω
39pF
SXT-289
4.3 Ω
15 nH
39pF
Z=50 Ω, 49.8 °
1.0 pF
Frequency
2140 MHz
Small Signal Gain (dB) 15.0
Output IP3 (dBm)
39.2*
P1dB (dBm)
23.0
*Note: IP3 performance degraded due to lower
(4.5V) device voltage.
39pF
0.1 uF
22pF
UMZ1N
220 Ω
1000pF
1.8K Ω
1
4.3 Ω
15nH
750 Ω
1.0p
F
39pF
2140 MHz Schematic
NOTE: Reference Application Note AN-026 for more
information on Active Current Feedback Bias Circuit.
ALL COMPONENTS 0603 UNLESS NOTED OTHERWISE
STANFORD MICRODEVICES
XAMP EVALUATION BOARD
ECB-101872 Rev A SOT-89
2140 MHz Evaluation Board Layout
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
6
http://www.stanfordmicro.com
EDS-101157 Rev D
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