Q.
The frequency response plots in the AD8376 and AD8376 DGA data sheets show roll-off at low frequency. Is there any way around this?
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Q.
The frequency response plots in the AD8376 and AD8376 DGA data sheets show roll-off at low frequency. Is there any way around this?
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Q.
What are the precautions to prevent latch-up on the AD8375?
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A.
The outputs of the AD8376 are open collectors that need to be pulled up to the positive…
hello,
I want to design a IF receiver board, the RF input from 400Mhz to 900Mhz, 40Mhz bandwidth,tuneable, i want to get 144Mhz IF signal,
I select following chips
ADL5801 downconvertor mixter
ADF4350 LO
AD8375 IF amp
who can tell me how to design…
你好!
我现在正在选取VGA放大电路,之前选用的AD8375是数字控制的,增益控制响应(Gain Step Response)时间为5ns(我能找到的最短时间),不满足我们的设计要求。AD8351是模拟控制的,我不知道settling Time 是不是相应的增益控制响应时间2ns,即当控制电压从a V到b V后多长时间,输出信号才达到对应的放大后的值,是2ns吗?。如果工程师您有时间更短的VGA(最好小于1ns),麻烦推荐,我们需要的带宽为150MHz~450Mhz,放大倍数约为-4db~20db或更宽…
How can i interface AD9265 with CMOS single ended clock driver without using transformer ?
do i need a clock driver ? actually i am driving my clock from FPGA cyclone V.
Do you have any design file which interface this adc to cyclone V ?
What differential…
Hi Vishnu,
I am sorry I didnt see this comment until now. The NSD for the amplifier is dependent on the design. The AD8375's architecture lends itself to a constant NSD of about 20nV/rtHz across frequencies. I am not sure that you can compare the NF…
hi Umesh,
The article is very informative.
I have a doubt in the calculation of NSD for the VGA. You have taken the NSD as 20nV/sqrtHz (In AD8375 datasheet it is mentioned typically this value). Is there any equation to derive this value. In the…
thanks. i have some other question
attached is my design circuit, can u give me some advice?
1. for best performance, LO out of ADF4350 need more filter? how to design it?
2. i don't know how to design the impedance match of ADL5801-> AD8375, AD8375…