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参数资料
| 型号： | MAX2056EVKIT |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX2056 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 放大器，CDMA |
| 频率： | 800MHz ~ 1GHz |
| 适用于相关产品： | MAX2056 |
| 已供物品： | 板 |
800MHz to 1000MHz Variable-Gain
Amplifier with Analog Gain Control
Table 1. Typical Application Circuit
Components Values
formance is obtained when R1 and R2 are equal to
1.2k ? and 3.92k ? , respectively. The typical supply cur-
rent is 136mA and the typical output IP3 is 39dBm
DESIGNATION
VALUE
TYPE
under these conditions.
C1, C3, C5, C10
C2, C4, C6, C8, C9
47pF Microwave capacitors (0402)
1000pF Microwave capacitors (0402)
Increasing R1 and R2 from the nominal values of 1.2k ?
and 3.92k ? reduces the bias current of each amplifier
C7
C13, C14, C15
R1
R2
3.9pF
0.1μF
1.2k ?
3.92k ?
Microwave capacitor (0402)
Microwave capacitors (0603)
±1% resistor (0402)
±1% resistor (0402)
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
Applications Information
Analog Attenuation Control
A single input voltage at the V CNTL pin adjusts the gain
of the MAX2056. Up to 22dB of gain-control range is
provided through a single attenuator. At the maximum
gain setting, each attenuator’s insertion loss is approxi-
mately 1.7dB. With the single attenuator at the maxi-
mum gain setting, the device provides a nominal
15.5dB of cascaded gain and 4.5dB 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 22dB of gain-control range. With
the second attenuator connected at the maximum gain
setting, the device typically exhibits 13.8dB of cascad-
ed gain. Note that the V CNTL pin simultaneously adjusts
both on-chip attenuators. The V CNTL input voltage dri-
ves a high-impedance load (>250k ? ). 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 voltage be applied when V CC
is not present. A series resistor 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.
Amplifier Bias Current
The MAX2056 integrates a two-stage amplifier to simul-
taneously provide high gain and high IP3. Optimal per-
any RF/microwave circuit. Keep RF signal lines as short
as possible to reduce losses, radiation, and induc-
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 MAX2056 evaluation kit data sheet for more details.
Exposed Paddle RF and Thermal
Considerations
The EP of the MAX2056’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.
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11
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相关代理商/技术参数 |
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| MAX2057 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation Kit |
| MAX2057_1 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation Kit |
| MAX2057ETX | 功能描述:射频放大器 1.7GHz - 1GHz Variable-Gain Amp 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 |
| MAX2057ETX+ | 功能描述:射频放大器 1.7GHz - 1GHz Variable-Gain Amp 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 |
| MAX2057ETX+D | 制造商:Maxim Integrated Products 功能描述:RF AMP CHIP SGL GAIN AMP 2.5GHZ 5.25V 36TQFN DRY - Rail/Tube |
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