High performance industrial signal level multi-channel data acquisition circuit diagram

　　Figure 1 shows a high-performance industrial signal level multichannel data acquisition circuit that has been optimized for fast channel-to-channel switching. The circuit can process 16 channels of single-ended inputs or 8 channels of differential inputs with up to 18 bits of resolution.

　　The single channel sampling rate is up to 1.33MSPS with 18-bit resolution. All input channels have an inter-channel switching rate of 250kHz with 16-bit performance.

　　The signal processing circuit is combined with a simple 4-bit up/down binary counter to provide a simple, cost-effective solution for switching between channels without the need for FPGAs, CPLDs, or high-speed processors. The counter can be programmed to count up or down to achieve sequential sampling of multiple channels, or it can be loaded with a fixed binary word for single-channel sampling.