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0.1GHz to 3GHz, 75dB Logarithmic
Detector/Controller
POWER AMPLIFIER
V S
R4
TRANSMITTER
C6
C5
1
V CC
GAIN-CONTROL INPUT
COUPLER
RFIN
C1
2
DETECTORS
INHI
20k ?
OUT 8
SET 7
V OUT
V SET
SET-POINT
OUT
SET
LOGARITHMIC
DETECTOR
IN
C2
3
INLO
20k ?
GND
6
DAC
20k ?
C4
C3
4
V CC
MAX2015
PWDN
5
20k ?
MAX2015
Figure 2. Controller-Mode Typical Application Circuit
detected signal with a reference voltage determined by
V SET . The integrator, acting like a comparator, increas-
es or decreases the voltage at OUT, according to how
closely the detected signal level matches the V SET ref-
erence. The MAX2015 adjusts the power of the PA to a
level determined by the voltage applied to SET. With R1 =
0 ? , the controller mode slope is approximately
19mV/dB (RF = 100MHz).
Figure 3. System Diagram for Automatic Gain-Control Loop
Layout Considerations
As with any RF circuit, the layout of the MAX2015 circuit
affects the device’s performance. Use an abundant num-
ber of ground vias to minimize RF coupling. Place the
input capacitors (C1, C2) and the bypass capacitors
(C3–C6) as close to the IC as possible. Connect the
bypass capacitors to the ground plane with multiple vias.
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相关代理商/技术参数
MAX2015EUA-T 制造商:Maxim Integrated Products 功能描述:0.1GHZ TO 2.5GHZ, 75DB LOGARITHMIC DETECTOR/C - Tape and Reel
MAX2015EVKIT 功能描述:射频开发工具 RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V
MAX2016 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation Kit
MAX20-16.0C 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE
MAX20-16.0CA 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE
MAX2016_06 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:LF-to-2.5GHz Dual Logarithmic Detector/ Controller for Power, Gain, and VSWR Measurements
MAX2016_1 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation Kit
MAX2016ETI 功能描述:射频检测器 LF-2.5GHz Dual Log Detector/Controller RoHS:否 制造商:Skyworks Solutions, Inc. 配置: 频率范围:650 MHz to 3 GHz 最大二极管电容: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SC-88 封装:Reel