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| 型号： | MAX2057ETX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/13页 |
| 文件大小： | 0K |
| 描述： | IC AMP VARIABLE GAIN 36-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 频率： | 1.7GHz ~ 2.5GHz |
| P1dB： | 23.8dBm（239.9mW） |
| 增益： | 13.5dB ~ 17.5dB |
| 噪音数据： | 6dB |
| RF 型： | 手机，ATE，GSM，EDGE，ISM，W-CDMA，802.16/WiMax，CDMA2000 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 电流 - 电源： | 180mA ~ 230mA |
| 测试频率： | 2.1GHz |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
1300MHz to 2700MHz Variable-Gain
Amplifier with Analog Gain Control
Table 1. Typical Application Circuit
Component Values
Amplifier Bias Current
The MAX2057 integrates a two-stage amplifier to simul-
taneously provide high gain and high IP3. Optimal per-
DESIGNATION
C1, C3, C5, C7, C10
C2, C4, C6, C8, C9
C13, C14, C15
C17
R1
R2
VALUE
22pF
1000pF
0.1μF
0.75pF
1.2k ?
2k ?
TYPE
Microwave capacitors
(0402)
Microwave capacitors
(0402)
Microwave capacitors
(0603)
Microwave capacitor
(0402)
±1% resistor (0402)
±1% resistor (0402)
formance is obtained when R1 and R2 are equal to
1.2k ? and 2k ? , respectively. The typical supply current
is 180mA and the typical output IP3 is 37dBm under
these conditions.
Increasing R 1 and R 2 from the nominal values of 1.2k ?
and 2k ? reduces the bias current of each amplifier
stage, which reduces the total power consumption and
IP3 of the device. This feature can be utilized to further
decrease power consumption for applications that do
not require high IP3.
Layout Considerations
A properly designed PC board is an essential part of
any RF/microwave circuit. Keep RF signal lines as short
as possible to reduce losses, radiation, and induc-
Applications Information
Analog Attenuation Control
A single input voltage at the V CNTL pin adjusts the gain
of the MAX2057. Up to 21dB of gain-control range is
provided through a single attenuator. At the maximum
gain setting, each attenuator’s insertion loss is approxi-
mately 2.2dB. With the single attenuator at the maximum
gain setting, the device provides a nominal 15.5dB of
cascaded gain and 6dB of cascaded noise figure.
If a larger gain-control range is desired, a second on-
chip attenuator can be connected in the signal path to
provide an additional 21dB of gain-control range. With
the second attenuator connected at the maximum gain
setting, the device typically exhibits 13.3dB of cascad-
ed gain. Note that the V CNTL pin simultaneously adjusts
both on-chip attenuators.
The V CNTL input voltage drives a high-impedance load
(> 50k ? ). It is suggested that a current-limiting resistor
be included in series with this connection to limit the
input current to less than 40mA should the control volt-
age be applied when V CC is not present. A series resis-
tor of greater than 200 ? will provide complete
protection for 5V control voltage ranges. Limit V CNTL
input voltages to a 1.0V to 4.5V range when V CC is
present to ensure the reliability of the device.
tance. For best performance, route the ground-pin
traces directly to the exposed pad underneath the
package. This pad MUST be connected to the ground
plane of the board by using multiple vias under the
device to provide the best RF and thermal conduction
path. Solder the exposed pad on the bottom of the
device package to a PC board exposed pad.
Power-Supply Bypassing
Proper voltage-supply bypassing is essential for high-
frequency circuit stability. Bypass each V CC pin with
capacitors placed as close to the device as possible.
Place the smallest capacitor closest to the device. Refer
to the MAX2057 evaluation kit data sheet for more details.
Exposed Pad RF and Thermal
Considerations
The EP of the MAX2057’s 36-pin thin QFN-EP package
provides a low-thermal-resistance path to the die. It is
important that the PC board on which the IC is mounted
be designed to conduct heat from this contact. In addi-
tion, the EP provides a low-inductance RF ground path
for the device.
The EP MUST be soldered to a ground plane on the PC
board either directly or through an array of plated via
holes. Soldering the pad to ground is also critical for
efficient heat transfer. Use a solid ground plane wher-
ever possible.
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX2057EVKIT | 功能描述:放大器 IC 开发工具 RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX2058 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer |
| MAX2058ETL | 功能描述:射频放大器 0.7GHz - 1.2GHz SPI-Controlled DVGA 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 |
| MAX2058ETL+ | 功能描述:射频放大器 0.7GHz - 1.2GHz SPI-Controlled DVGA 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 |
| MAX2058ETL+T | 功能描述:射频放大器 0.7GHz - 1.2GHz SPI-Controlled DVGA 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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