• ADA4896, ADA4897 input bias current direction.

    Hello,

    In the datasheet of ADA4896/ADA4897 bias current is specified as -11uA (typ.). What "-" sign signifies? At first I assumed it signifies the direction of current flow as in "-" signifies current flowing out of the input pin and "+" signifies current…

  • 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!!

  • 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…

  • 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…

  • JPEG Processing - 4:2:2 v 4:2:0?

    My JPEG saga continue...

    I am using a BF561 single core to compress a 640x480 YUV 4:2:2 image into JPEG format, employing the ADI JPEG Library tools.  I am getting very poor performance compared with the reference results from the Spec Sheet.  The Spec…

  • ADV7842 4:2:2 DDR mode, ADV7393: Stanag3350 support?  (2)

    Hello Dave,

    I am facing problems with replies to your answer, so I am oppening a new dicussion with the same title.

    Please clarify your answer regarding STANAG support:

    2) As I understand it, this is the same as RS-343A/EIA-343A and none of our parts…

  • LTC6804-2 and LTC6811-2 reference voltage 1 and 2 at 0V.

    Hello,

    I installed 2x LTC6811-2 and then 1x LTC6804-2 on the same board and I don't have any voltage reference output at anytime. The functional diagram in the datasheets shows that VREF1 should be always present as it's generated from V+. VREF2 is not…