江苏润石:高驱动能力运算放大器RS8471

Release time:2024-11-29
author:AMEYA360
source:江苏润石
reading:1081

  Vcom是TFT-LCD液晶屏驱动用的信号,在屏内连接至每一个显示单位,屏的尺寸越大,Vcom的走线越长,而驱动信号要求快速建立,否则显示画面就会产生鬼影、重影等异常现象,通用的设计方案都是采用所谓“Vcom Buffer”的高速运算放大器来设计实现。

江苏润石:高驱动能力运算放大器RS8471

  RS8471是一款高驱动能力的运算放大器,瞬时输出电流可达1安培,持续输出电流支持400mA,轨对轨输入/输出,主要适用于TFF-LCD液晶屏的Vcom 信号驱动,也可以当做线性电压源使用,为需要高精度或者需要快速变化的系统提供稳定而干净的电压。

  RS8471运放采用高压BCD工艺设计,主要参数特性如下:

  Ø 单位增益稳定;

  Ø 高压摆率65V/μs;

  Ø 单位增益带宽: 25MHz

  Ø 瞬时输出电流:1000mA

  Ø 低输入失调电压:1mV(Typ);

  Ø 低输入偏置电流:100pA;

  Ø 低噪声:45nV/√Hz

  Ø 建立时间:0.35μs;

  Ø 轨对轨输入/输出;

  Ø 电源纹波抑制比PSRR 90dB;

  Ø 共模抑制比CMRR 68dB;

  Ø 开环增益130dB;

  Ø 宽工作电压范围,4.5V~24V;

  Ø 扩展工业级工作温度范围-40°C~85°C。

江苏润石:高驱动能力运算放大器RS8471

  由于需要支持高功率输出,RS8471采用DFN3X3的封装,芯片底部带散热焊盘,以增强散热,封装尺寸和管脚定义都与当前市场通用产品兼容,欢迎各界工程师朋友索样评测。

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