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参数资料
| 型号： | MAX2235 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 衰减器 |
| 英文描述： | +3.6V, 1W Autoramping Power Amplifier for 900MHz Applications |
| 中文描述： | 800 MHz - 1000 MHz RF/MICROWAVE WIDE BAND MEDIUM POWER AMPLIFIER |
| 文件页数： | 6/8页 |
| 文件大小： | 149K |
| 代理商： | MAX2235 |
M
+3.6V, 1W Autoramping Power
Amplifier for 900MHz Applic ations
6
_______________________________________________________________________________________
Detailed Desc ription
The MAX2235 power amplifier (PA) operates over a
wide frequency range of 800MHz to 1000MHz. The sig-
nal path consists of three stages: the input stage, the
driver stage, and the power stage. There are matching
circuits between the first and second stages, and
between the second and third stages. The bias circuits
process external commands to control the device’s
power-up/down and the gain of the PA.
Input S tage
The first stage is a variable-gain amplifier with 37dB
gain-control range. The input transistor acts as a
transconductor with constant bias current. Gain control
is achieved by steering the signal current from the input
transistor to the first output matching network (to drive
the second stage) or to a separate supply pin. This
stage operates in class A and remains on in standby
mode to ensure that the VSWR at the input does not
vary more than 1.5:1 compared with normal operation.
The input stage typically requires an external inductor
to achieve an optimum input VSWR.
S ec ond S tage (Driver)
The driver produces a signal large enough to drive the
power stage into saturation. The driver stage operates
in Class C and is off during standby.
S ec ond- and T hird-S tage Matc hing
The interstage matching networks provide optimal load-
ing and power transfer. The circuits are on-chip to save
board space. The bandwidths of the matching net-
works allow the PA to operate over a wide frequency
range.
Typic al Operating Circ uit
20
19
18
17
8
7
6
5
4
3
2
1
16
15
14
13
9
10
11
12
GND
V
CC
V
CC
V
CC
GND
GND
V
CC
V
CC
GND
RFIN
SHDN
GND
GND
RFOUT
RFOUT
GND
GND
REF
RAMP
GC
0.068
μ
F
470pF
470pF
1500pF
47pF
1000pF
1000pF
11pF
MAX2235
68pF
V
CC
V
CC
V
CC
V
CC
V
CC
J2
JU2
JU1
SMA
SMA
J3
J4
8.2nH
*
100pF
100pF
1000pF
1000pF
22pF
100pF
100pF
0.01
μ
F
1
μ
F
J1
1
2
3
*
VALUE OF OUTPUT INDUCTOR DEPENDS ON APPLICATION.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX2235EUP | +3.6V, 1W Autoramping Power Amplifier for 900MHz Applications |
| MAX2244EBL-T | 2.5GHz, 22dBm/20dBm Power Amplifiers with Analog Closed-Loop Power Control |
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| MAX2246EBL-T | 2.5GHz, 22dBm/20dBm Power Amplifiers with Analog Closed-Loop Power Control |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX2235_1 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation Kit |
| MAX2235EUP | 功能描述:射频放大器 RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX2235EUP+ | 功能描述:射频放大器 Autoramping Power Amp for 900MHz Ap RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX2235EUP+T | 功能描述:射频放大器 Autoramping Power Amp for 900MHz Ap RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX2235EUP-T | 功能描述:射频放大器 RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
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