The LO port isolation degree of AD831 is only 15dB, and this value will not change with the amplitude and frequency of LO port signal, which is a constant value.

I would like to know how to calculate the C1, C2 and L1 values at the input to the AD831 mixer.

as far as i understand, C1 and L1 form an impedance matching network and C2 is the ac couupling capacitor. is this correct? my problem now is i'm not sure…

Hello, I am using the AD831 in my design, WITHOUT using the internal amplifier (using the differential current output) and I have a couple questions.

1. The internal gain indicated in the datasheet (pi/2) is provided by the gilbert cell or the output…

I have an application which can be summarized as in the attached diagram.
An AD831 Mixer receives LO signal at 88.32 MHz from PLL #1. It also receives an RF signal at 49.92 MHz from PLL #2. IF o/p is 38.4 MHz. Filters not shown.
Both PLLs are driven by…

Hi!

Is there a way to model AD831? Should I download ADIsimRF or ADIsimPLL?

Thanks!

Hi again,

I am having some problems adjusting the bias current of the AD831. According to the datasheet a resistor must be connected between the BIAS pin and Vp. And for minimum bias current, connect it directly without resistor.

The problem is that…

Hello,

i would like to use the ad831 for mixing down my voltage signal to fix intermediate frequency of 10 kHz.

the voltage signal varies in frequency from 10 kHz to 10 MHz.

So the idea is to mix down my signal with a frequency of f_signal + 10 KHz…

Hello. I have built a test circuit for the AD831 as per the single voltage supply on the data sheet.

I am feeding the RFin with 7Mhz @ 20mv LO with 3Mhz @ 10mv and a 9V supply.

The chip seems to get quite hot is this normal?

Regards - Paul

我在使用AD831的时候发现：本振和射频端都输入同频同相的信号时，输出为负的直流偏置加两倍频波形，但是理论上直流偏置不是应该是正的吗？是不是AD831的输出那个放大器进行反相了？

Hello,

I am an EE student designing my first  specialized receiver, but I came across a problem.

I do not know what the input voltage range of the incoming RF signal is for the AD831. And what would the IF output voltage be with those inputs, considering…