1.当AD6645输入为正,范围是0-1.1V时,输出的二进制补码最高位是符号位,后13位才代表实际值吗?
那实际分辨率是13位,计算实际值时每一位代表的值 LSB= 1.1 / 2^13 这样理解对吗?
2. 0V此时对应代码是00_0000_0000_00000吗?还是全为1
We design a data acquisition system and noticed an overshoot with a ~3us time constant in the ADC data. It is a small effect but it biases our data quality. I spent some time in identifying the source of the time constant.
The source of the time constant…
Hello,
I use AD6645 evaluation board which has 105 MHz cyrstal to sample analog signal. I send sampled signal to a computer and plot that. The signal below which is at 200 KHz is sampled by AD6645 . The sine wave is generated by Agilent waveform generator…
ADI工程师:
您好!我最近在使用你们公司的AD6645的过程中遇到一些问题,想请教一下。我的电路图是按照AD6645的技术手册PDF画的,板子回来后进行测试,光给芯片上电,AD6645就很烫了,后来就烧了,从7、8、9这几个引脚的地方冒烟,不知道这是怎么回事。DVCC接的是3.3V,AVCC接的是5V。模拟地和数字地是分开的,通过一个0欧电阻相接。但是AD6645的裸露焊盘没有接地,不知道这会不会有影响。
Hi,
I have purchased AD6645 evaluation board and trying to get data from it,
I want to ask some questions. The board is equipped according to the AC coupled analog input configuration. Should I terminate the analog input SMA connection by R2=50 or…
I would like to calculate the noise expected when using an AD6645 in an undersampling application, to sample a signal at 180 MHz using a 55 MHz sample rate.
Could you tell me a reference that shows me the contributions to noise and the calculations needed…