收藏本站
LF-to-2.5GHz Dual Logarithmic Detector/
Controller for Power, Gain, and VSWR Measurements
Power-Controller Mode
The MAX2016 can also be used as a power detector/
controller within an AGC loop. Figure 7 depicts a sce-
nario where the MAX2016 is employed as the AGC cir-
cuit. As shown in the figure, the MAX2016 monitors the
OUTA and OUTB Slope Adjustment
The transfer slope function of OUTA and OUTB can be
increased from its nominal value by varying resistors
R1 and R2 (see the Typical Application Circuit ). The
equation controlling the slope is:
SLOPE OUTA OR OUTB = ? 9
?
? ( R 1 or R 2 ) + 40 k ?
? ?
output of the PA through a directional coupler. An inter-
nal differencing amplifier (Figure 5) compares the
detected signal with a reference voltage determined by
V SET_ . The differencing amplifier increases or decreas-
? mV ?
? dB ?
? ?
20 k
es the voltage at OUT_, according to how closely the
detected signal level matches the V SET_ reference. The
MAX2016 maintains the power of the PA to a level
determined by the voltage applied to SET_.
Since the logarithmic detector responds to any ampli-
tude modulation being carried by the carrier signal, it
OUTD Slope Adjustment
The transfer slope function of OUTD can be increased
from its nominal value by varying resistor R3 (see the
Typical Application Circuit ). The equation controlling
the slope is:
SLOPE OUTD = ? ? 25
mV ? ? R 3 + 20 k ?
dB ? ?
?
? ? ?
may be necessary to insert an external lowpass filter
between the differencing amplifier output
(OUTA/OUTB) and the gain-control element to remove
?
?
20 k
this modulation signal.
Input Highpass Filters
The MAX2016 integrates a programmable highpass fil-
ter on each RF input. The lower cutoff frequency of the
MAX2016 can be decreased by increasing the external
capacitor value between FA1 and FA2 or FB1 and FB2.
POWER AMPLIFIER
By default, with no capacitor connecting FA1 and FA2
or FB1 and FB2, the lower cutoff frequency is 20MHz.
TRANSMITTER
GAIN-CONTROL INPUT
COUPLER
Using the following equation determines the lowest
operating frequency:
LOWPASS
FILTER
OUTA/
OUTB
RFINA/
LOGARITHMIC RFINB
DETECTOR
frequency =
1
2 π RC
SETA/
where R = 2 Ω .
SET-POINT
DAC
SETB
20k Ω
Differential Output Video Filter
The bandwidth and response time difference of the out-
put amplifier can be controlled with the external capaci-
tor, C 15 , connected between FV1 and FV2. With no
20k Ω
MAX2016
external capacitor, the bandwidth is greater than 20MHz.
The following equation determines the bandwidth of the
amplifier difference:
Figure 7. In Power-Controller Mode, the DC Voltage at OUTA or
frequency =
1
2 π RC
OUTB Controls the Gain of the PA, Leading to a Constant
Output Power Level ( Note: Only one controller channel is
shown within the figure. Since the MAX2016 is a dual con-
troller/detector, the second channel can be easily implemented
by using the adjacent set of input and output connections.)
where R = 1.8k Ω .
Use a video bandwidth lower than the anticipated low-
est amplitude-modulation frequency range to yield the
greatest accuracy in tracking the average carrier
power for high peak-to-average ratio waveforms.
______________________________________________________________________________________
15
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MAX2021ETX+T IC MOD/DEMOD 36-TQFN
MAX2022ETX+T IC MOD 1500MHZ TO 2500MHZ 36TQFN
MAX2022EVKIT EVAL KIT FOR MAX2022
MAX2023ETX+T IC MOD/DEMOD HI DYN RNG 36-TQFN
MAX2027EUP+D IC AMP VAR GAIN 20-TSSOP
MAX2027EVKIT EVAL KIT FOR MAX2027
MAX2029ETP+T IC MIXER UP/DOWN HI LIN 20-TQFN
MAX2031EVKIT EVAL KIT FOR MAX2031
相关代理商/技术参数
MAX2016ETI+TD 制造商:Maxim Integrated Products 功能描述:DUAL LOGARITHMIC DETECTOR/CNTRLR TQFN EP - Tape and Reel
MAX2016ETI-T 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
MAX2016EVKIT 功能描述:射频检测器 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
MAX20-17.0C 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE
MAX20-17.0CA 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE
MAX20-18.0C 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE
MAX20-18.0CA 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE
MAX201C/D 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: