• ADA4897-1输出摆幅问题

    大家好,最近有一个项目打算采用ADA4897-1作为ADC驱动放大器,手动搭接了一个电压跟随器用于测试ADA4897-1,设计采用5V单端供电,信号发生器到运放采用交流耦合的方式,同时在同相端增加一个2.5V偏置电压,使用示波器查看输出波形,发现在输入信号幅度较小时,电路工作正常,但是当输出幅度大于4.2V时,信号出现顶端截止的现象,但是按照手册上说的,其输出摆幅应该在0.2-4.8之间,而且我用pspice仿真时,确实是在4.8V时才截止的,不知道大家碰到过没有,期待您的回复!!

  • ADA4897-1, ADA4897-2, ADA4896-2 Maximum Operating Voltage Range

    Will the ADA4897-1 run off a single +5V or +12V Supply Range ?

     

    On pages 4-5 of the data sheet you will find the operating parameters for +5V
    supply range. According to the data sheets, the ADA4897 has a normal operating
    voltage range…
  • ADA4896-2\ADA4897-1\ADA4897-2

    请问这三款除了引脚不一样,集成运放数量不一样,4897带了使能端之外,4896与4897的性能是否一致?

  • Huge offset voltage with ADA4897-1

    I have a standard inverting amplifier stage with Rf = 100k and Rg = 10k (A = -10 V/V).  The amp is powered from +/-5V and the positive input terminal is connected to 0V.  Pins 1 and 5 are open.  Pin 8 (nDISABLE) is also left open.  Very straightforward setup…

  • OP284 and ADA4897-1 and maximum PCB driving distance

    Hello experts

    Question and appreciate your advise:

    For a standard PCB (FR4, 4 layers 1.6mm pcb thickness, track of 0.254mm, with ground plane on the 2nd layer). point-to-point. and assuming termination is good. Signal source frequency is approx 1khz…

  • unity gain amplifier using ada4897-1

    i am using ADA4897 as non inverting unity gain amplifier. i used function generator to provide the input to the opamp(dc voltage).  when i try to measure the voltage at the input of non-inverting terminal(i/p), I could see some change in the o/p of opamp…

  • oscillations in ada4897-1 o/p

    I am using the above mentioned opamp as a unity gain amplifier and the opamp is powered from 5V supply (Single supply). I am seeing oscillations in the o/p if opamp when a dc or ac input  is given to opamp. can any one suggest the reason. i have provided…

  • ADA4897-1损坏问题原因分析

    用ADA4897-1做反相放大,±5V供电,调试时用直流稳压电源供电,由于稳压电源没有使能功能,所以板子直接连在稳压电源上打开电源,结果三片4897全部损坏。又试了一次,又损坏了三个,但是同板子的JFET放大器没有损坏。由于板子需要器件的可靠性很高,所以想查清楚原因,麻烦各位朋友帮忙分析一下!

  • 【求助】ADMP401 加运放ADA4897-1 电路  Vref取值问题?

    ADMP401 加运放ADA4897-1 电路  Vref,这个参考电压应该取什么值?这个取值有什么要求呢?

  • 使用ADA4897-1出现大幅失调电压 ,怎么办?

    来自网友jeg 的提问

     

    我有一个标准反相放大器级Rf=100KRg = 10k (A = -10 V/V) 放大器采用+/-5V电源供电并且正输入端子连接到0V 引脚15为开路。 引脚8 (nDISABLE)也为开路。 非常简单的设置。

     

    问题是输出的DC失调为-2.2V除此以外行为与AC信号的预期行为相同。 尝试禁用引脚高电平,但没有效果。 在三个ADA4897-1器件上重复了此操作,结果全部相同。 在正输入与接地之间插入一个9kOhm的偏置补偿电阻之后,DC失调…