摘要
以MSP430F4250为核心,配合高效率的升压式DC/DC微功率电源,设计了一款高精度的两线制显示模块。使用专门设计的段式LCD,支持-1999~9999范围的线性或者平方根数字显示,支持℃、%、Pa、kPa、MPa、m及m3等多种物理量的显示。在4~20 mA供电时,精度优于0.03%。工作仅需2.2 V低电压差,同时能够为LCD提供高亮度背光。
asing on MSP430F4250 display module and step-up DC/DC micro-power supply,a two-wire LCD display panel was designed to display linear signal range from 1999-9999 or the square root one,units and measurement symbols such as ℃、%、Pa、 kPa、MPa、m and m3.The display precision reached 0.03% above when the power supply current changed at 4~20mA.It can work with a voltage difference of 2.2V and give high backlighting.
出处
《化工自动化及仪表》
CAS
北大核心
2010年第4期54-56,60,共4页
Control and Instruments in Chemical Industry
关键词
两线制显示模块
微功率电源
低成本
高精度
低电压差
two-wire display module
micro-power supply
low-cost
high precision
low voltage difference
