Abstract: The DS3904 contains three digitally controlled nonvolatile (NV) variable resistors. It has the capability of placing each of the variable resistors into a high-impedance state. Using this feature, it is possible to create a 2-wir...

Abstract: This article discusses how to improve linearity (due to loading of the wiper) and mid-range frequency response of a digital potentiometer in VCO control applications by adding a single external resistor between H and W. ...

摘要：本文介紹了一種簡單電路，能夠?qū)?shù)字電位器的帶寬從10倍提高到100倍。利用這一方法，數(shù)字電位器可以用于視頻帶寬的高頻應(yīng)用。 數(shù)字電位器(digital pot或digipot)...

利用空閑ROM防止程序飛跑1、 全部填02H，相當(dāng)于“LJMP 0202H”，作個軟件看門狗。2、 填“02 00 00”這樣就是“LJMP 0000H”了。3、 都填“00”，00H是“NOP”指令，...

摘要：利用一對相同的數(shù)字電位器構(gòu)建電壓-電阻轉(zhuǎn)換方案。 在工業(yè)控制和偏置調(diào)節(jié)電路中有時需要將電壓轉(zhuǎn)換成電阻，這一過程在具體實施時有一定的難度。圖1所示...

摘要：本應(yīng)用筆記介紹了一種通過幾個按鍵和一個微控制器控制數(shù)字電位器DS1803或DS1805阻值的簡易方法。 概述本應(yīng)用筆記介紹了一種使用幾個按鍵和一個微控...

摘要：數(shù)字電位器(digipot)能夠在各種應(yīng)用中為模擬電路提供便利的電阻、電壓和電流的數(shù)字控制與調(diào)節(jié)。該應(yīng)用筆記介紹了數(shù)字電位器的基本功能，說明了如何改進(jìn)數(shù)字電位器以提...

Abstract: Abstract: Both the DS1847 and DS1848 feature two 256-position digital resistors and lookup tables (LUT) to automatically adjust the resistance over a temperature range of -40°C to 95°C. The DS1848 also features 128 bytes of use...

Abstract: The temperature characteristics of digital potentiometers differ from those of traditional mechanical potentiometers. The effects of temperature on the absolute resistance of the potentiometer must be taken into consideration whe...

Abstract: This application brief describes the two topologies used to bias optical laser drivers (open loop and closed loop) and demonstrates examples using the DS1847 digital potentiometer and the MAX3273 laser driver. A laser module desi...

Abstract: The DS1854, DS1857, and DS1858 monitor VCC, ambient temperature, and external analog inputs. This application note explains how to interpret the values stored in the Main Device SRAM and translate them into temperature and voltag...

Abstract: The purpose of this application note is to show how the DS1847/48 digital resistor calibration constants can be regenerated. This application note assumes that the reader is familiar with the Programming the Lookup Table section ...

Abstract: This application note explains packet-error checking (PEC) as it applies to the DS1862 laser-control and digital-diagnostics IC. The DS1862 incorporates a CRC-8 byte and several other special bytes to improve the reliability of t...

摘要：DS1863突發(fā)模式PON控制器集成了監(jiān)測電路，可用于配置報警、預(yù)警、查找表及其它功能。為了實現(xiàn)這些編程功能，需要一個大容量的映射寄存器，本應(yīng)用筆記介紹了寄存器圖的...

摘要：DS1865突發(fā)模式PON控制器內(nèi)置監(jiān)測電路，可用于配置報警、預(yù)警、查找表以及應(yīng)用筆記4052 (DS1863存儲器速查指南)中的其他詳細(xì)功能。為實現(xiàn)這些編程功能，需要一個大容量的映...

摘要：DS3984和DS3988是多通道的冷陰極熒光燈(CCFL)控制器。使用DS3984和DS3988優(yōu)化系統(tǒng)設(shè)計時，關(guān)鍵參數(shù)是變壓器匝數(shù)比的選擇。本應(yīng)用筆記介紹了變壓器匝數(shù)比因不同的CCFL燈管和直流...

一、前言       “安全防范”是公安保衛(wèi)系統(tǒng)的專門術(shù)語，是指以維護(hù)社會公共安全為目的，防入侵、防被盜、防破壞、防火、防暴和安全檢查等措...

摘要：DS3906含有三個具有偽對數(shù)響應(yīng)的可變電阻。當(dāng)DS3906的內(nèi)部電阻與外部電阻并聯(lián)使用時，可獲得小步長的線性響應(yīng)。本應(yīng)用筆記以及相關(guān)電子數(shù)據(jù)表用實例展示了通過并聯(lián)外部...

摘要：本文介紹了如何利用一個標(biāo)準(zhǔn)器件，將DS1864 SFP激光控制器/監(jiān)測器中的電流DAC轉(zhuǎn)換成電壓輸出。 電流DACDS1864包含兩個8位吸電流DAC，可選擇1.5mA或0.5mA滿量...

lm339電壓比較器  LM339集成塊內(nèi)部裝有四個獨立的電壓比較器，該電壓比較器的特點是：1）失調(diào)電壓小，典型值為2mV；2）電源電壓...