Hello.Do you have a case that Cos CosLO, Sin, and SinLO require buffer amplifier?
Also, I want to reduce the number of parts by using a differential output amplifier in that case.
Is it possible?
Your query is being attended. We'll give our feedback as soon as possible.
As long as the AD2S1210 SIN/COS stay within its input range specified in the datasheet, you can use a differential amplifier to achieve this. The fault conditions must be considered so the common-mode voltage on the inputs should be properly set.
Depending on the gain used, there are plenty of differential amplifiers you can choose from. However, selecting tight tolerance components is recommended since external components may provide additional error due to phase and amplitude mismatch. I suggest using precision differential amplifiers wherein you can set the gain internally to minimize the mismatch error. AD8475, AD8476 and AD8275 can be applied for gains of 1, 0.4 and 0.2 respectively with operating frequencies of 10kHz and 100kHz.
Hope this helps.
Thank you for an answer
I was very informative.
I have a simple question.
If I use a differential amplifier, then do I need the termination resistor?
Apology for the delayed reply.
For differential application, you don't need the termination resistor. Termination resistor only applies to single-ended application. The AD2S1210 excitation frequency ranges from 2 kHz – 20 kHz. At these very low frequencies, it will probably be fine without the termination resistor.
It is recommended by our Amplifier Apps Engineer the use of termination resistor pass 1 MHz (a conservative rule of thumb).This matching was done to eliminate the reflection on products and have maximum power transfer for the transmission lines at high speed applications.
Retrieving data ...