Hello，I'm finding a DA satifing the follow factors:
a) can garantee the width of signal is 500ns~20us，and the repetition rate of 10K~50KHz
b) can garantee the amplitude of the signal is 0V~4V
Please help me,thank you!
What do you mean by "width of the signal"?
Do you have any other requirements such as digital interface (SPI vs i2c) and channel counts?
Hi,thank you for your reply! The "width of the signal" is the modulation signal that I want the DA to output. The signal consists different amplitude square signals,and likes modulation of the sine signal and square signal.
I need 8 channels of the modulation signals, and the delay time of the any two-way signals of 6 channels should not exceed 20ns. Now I'm finding the method to acheive it.
Can you help me to acheive it and offer the reference plan of it ?
Sorry I was not able to comprehend what you want to do. Can you provide a block diagram and the signal you want to create together with the 500nS-20uS and 20nS requirement you mentioned, please?
The signal is composed of a series of actual pulse signals with different amplitudes. The envelope looks like a sinusoidal wave. The width of the pulse is between 500nS-20uS and the repetition frequency is controllable between 1 and 10KHz. A total of 8 such signals are required. Six of them require synchronization (the delay time between any two channels is no more than 20ns).
Can you provide a picture of the waveform please?
You may also want to post your question in EZ for Chinese customers.
Do you really intend to create pulses going from 2V to a certain value, then back to 2V?
What is the application of this circuit?
You may consider using AD5676R which has 8 channels and can output 0 to 5V using a gain of 2.
However, the fastest update period is around 870nS, and on top of that, you should also consider the slew rate for big voltage steps.
Thank you for your reply. First, I'm very sure I need to creat pulses going from 2V to a certain value, then back to 2V. Second, the fastest update period of AD5676R is around 870nS and I think it doesn't satisfy 500ns's width of the pulse .
If I use AD9784 and a amplifier,what do you think? Can you help me choose a amplifier?