24-bit, 250kSPS single-supply data acquisition system

Advantages and features:

*24-bit 250kSPS ADC system

*Industrial signal level

*Single power supply

application:

* Instrumentation

*Programmable logic control and distributed control system

*Electronic testing and measurement

* Circuit function and advantages

When sampling industrial level signals, fast high resolution conversion information must be provided. Typically, an analog-to-digital converter (ADC) can have a resolution of 14 bits to 18 bits when the sampling rate reaches 500kSPS. The circuit shown in Figure 1 is a single-supply system optimized for industrial-level signal sampling, using a 24-bit, 250 kSPS ∑-Δ ADC. Each of the two differential channels or four pseudo differential channels can Provides 17.2 bits of noise-free code resolution at a sampling rate of 50kSPS.

This circuit utilizes an innovative differential amplifier with built-in laser trimming resistors for attenuation and level shifting. A precision ADC with low supply voltage can solve the problem of digital standard processing of ±5V, ±10V and 0V to 10V. . This circuit can be used in process control (PLC/DCS modules), medical and scientific multichannel instruments and chromatographs.

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