Domestic alternative to ADS1248?

littleshrimp

Domestic alternative to ADS1248? [Copy link]

 

I saw a new product page on the forum. Using a capacitive PGA, Naxin Micro launched a high-precision multi-channel 24/16-bit Δ-Σ ADC . Judging from the model number in the selection table, it should be comparable to TI ADS124x and ADS114x. ADS1248 is widely used. Now the price of Liteon is 27 yuan per piece. If the domestic alternative can control the price to 1/2 or 1/3 of ADS1248, it will be quite OK.

Since there is no specific information, the ADC-NSAD124x and NSAD114x series have good indicators according to the news.

This is a block diagram posted on forums and other electronics websites. What is strange is that the input and feedback of the PGA are both capacitors. I don’t know if it is a mistake. If it is a capacitor, it means it is AC coupled and cannot be used to measure DC signals. However, RTD and thermocouple are both DC signals.

I found the corresponding news on the official website and found that the block diagram is no longer available, but it still exists on other electronics websites. You can pay attention to it first and learn more about it when you can download the official data sheet.

https://www.novosns.com/company-news-408

hjl2832

It is a bit unrealistic to reduce the price by half. One of my 24-bit AD products uses a domestic product to replace ADI. The pins and functions are directly replaced P2P. The price is only about 1/5 lower. But the performance is much worse. In other words, for the same hardware circuit, everything about ADI is normal, while the domestic product can basically not meet the requirements. The parameters of the hardware circuit must be modified for optimization. After adding a bunch of anti-interference, filtering and algorithms to the hardware and software, it can only barely reach the level of ADI.

littleshrimp

hjl2832 posted on 2024-11-1 12:42 It is a bit unrealistic to lower the price by half. One of my products, a 24-bit AD, uses a domestically made one to replace ADI. The pins and functions are directly replaced P2P. The price is only...

Is it because ADI’s supply is poor or for some other reason that we have to choose domestic alternatives?