Datasheet
数据手册 > 射频检测器 > Maxim Integrated > MAX4003EUA+ 数据手册PDF > MAX4003EUA+ 应用笔记 第 1/14 页
MAX4003EUA+
¥ 37.89
百芯的价格

MAX4003EUA+ 应用笔记 - Maxim Integrated

  • 制造商:
    Maxim Integrated
  • 分类:
    射频检测器
  • 封装
    uMAX-8
  • 描述:
    RF Detector 100MHz to 2500MHz 0dBm 8Pin uMAX
更新时间: 2024-08-04 01:07:40 (UTC+8)

MAX4003EUA+ 应用笔记

页码:/14页
下载 PDF
重新加载
下载
Click here for an overview of the wireless
components used in a typical radio
transceiver.
Maxim > Design Support > Technical Documents > Application Notes > Amplifier and Comparator Circuits > APP 3611
Maxim > Design Support > Technical Documents > Application Notes > Basestations/Wireless Infrastructure > APP 3611
Maxim > Design Support > Technical Documents > Application Notes > Wireless and RF > APP 3611
Keywords: log amps, logarithmic amplifiers, DC log amp, log amplifiers, logarithmic amps
APPLICATION NOTE 3611
Integrated DC Logarithmic Amplifiers
Sep 23, 2005
Abstract: Among the classes of logarithmic amplifiers, the DC log amp continues to be a very powerful,
cost-effective solution for compressing wide-dynamic-range sensor signals. This article derives the
overall DC log amp transfer function from the V
BE
-to-IC transfer characteristic of bipolar transistors. It
discusses the circuit blocks encountered in a modern-day integrated DC log amp, the various errors
affecting log amp performance, and a design example featuring the MAX4206. Finally, suggestions for
optimizing log amp performance through calibration and design pointers are detailed.
This article was also featured in Maxim's Engineering Journal, vol.
56 (PDF, 324kB).
For over half a century, engineers have used log amps for
compressing signals and for computation. Although digital ICs have
mostly replaced the log amp in applications that require computing,
engineers continue to use log amps to compress signals.
Therefore, the log amp remains a key component in many video,
fiber, medical, test and measurement, and wireless systems.
As implied by the name, a logarithmic amplifier expresses an
output that is related to its input by the mathematical log function (the logarithmic base is not important,
as the different log-based functions are related by constants). By utilizing the log function, you can
compress the dynamic range of signals encountered by a system. Compressing wide-dynamic-range
signals has several important benefits. The combination of a log amp and a low-bit-count ADC can often
save board space and system cost, whereas a high-bit-count ADC might otherwise be required.
Furthermore, low-bit-count ADCs are often already present in a given system or on a resident
microcontroller. The conversion to a logarithmic parameter is also useful in many applications where
measured quantities are evaluated in decibels, or where sensors exhibit exponential or near-exponential
transfer characteristics.
During the 1990s, the fiber communications industry began using log-amp circuits to measure optical
intensity in certain optical applications. Before that time, precision log-amp ICs were both costly and
bulky; such expense was warranted in only a handful of electronic systems. The only alternative to these
IC solutions were log amps constructed from discrete components. In addition to consuming even more
board area, discrete-component log amps were frequently prone to temperature changes and required
careful design and board layout. Highly matched components were also necessary to guarantee
adequate performance over a wide range of input signals. Semiconductor manufacturers have since
developed smaller and less costly integrated log-amp products with reduced temperature sensitivity and
Page 1 of 14

MAX4003EUA+ 数据手册 PDF

MAX4003EUA+ 数据手册
Maxim Integrated
12 页, 501 KB
MAX4003EUA+ 其它数据手册
Maxim Integrated
12 页, 496 KB
MAX4003EUA+ 应用笔记
Maxim Integrated
14 页, 182 KB

MAX4003 数据手册 PDF

MAX4003
数据手册
Maxim Integrated
100MHz to 2500MHz, 45dB RF Detector in a UCSPIndustry"s Smallest Quad-Band, 2.5GHz, 45dB RF Power Amplifier Detector Saves 80% Board Space
MAX4003EUA+T
数据手册
Maxim Integrated
RF Detector IC Cellular, TDMA, CDMA, GPRS, GSM 100MHz ~ 2.5GHz -45dBm ~ 0dBm 8-TSSOP, 8-MSOP (0.118", 3mm Width)
MAX4003EUA+
数据手册
Maxim Integrated
RF Detector 100MHz to 2500MHz 0dBm 8Pin uMAX
MAX4003ETA+
数据手册
Maxim Integrated
100MHz TO 2500MHz, 45dB RF DETECTOR IN A UCSP
MAX4003EUA
数据手册
Maxim Integrated
RF Detector 100MHz to 2500MHz 0dBm 8Pin uMAX
MAX4003ETA+T
数据手册
Maxim Integrated
RF Detector 100MHz to 2500MHz 0dBm 8Pin TDFN EP T/R
MAX4003EBL+T
数据手册
Maxim Integrated
* Complete RF Detector * Frequency Range from 100MHz to 2500MHz * Input Range of -58dBV to -13dBV (-45dBm to 0dBm into 50Ω ) * Fast Response: 70ns in 10dB Steps * Low-Current Consumption: 5.9mA at VCC = 3V * 13μA (typ) Shutdown Current * Available in 8-Bump UCSP or 8Pin µMAX and Thin QFN Packages
MAX4003ETA-T
数据手册
Maxim Integrated
RF Detector 100MHz to 2500MHz 0dBm 8Pin TDFN EP T/R
MAX4003EUA-T
数据手册
Maxim Integrated
RF Detector IC Cellular, TDMA, CDMA, GPRS, GSM 100MHz ~ 2.5GHz -45dBm ~ 0dBm 8-TSSOP, 8-MSOP (0.118", 3mm Width)
MAX4003EBL-T
数据手册
Maxim Integrated
100MHz to 2500MHz, 45dB RF Detector in a UCSP
Datasheet 搜索
搜索
百芯智造数据库涵盖1亿多个数据手册,每天更新超过5,000个PDF文件。
在线联系我们
黄经理 - 百芯智造销售经理在线,5 分钟前
您的邮箱 *
消息 *
发送