ADS826EG4

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Data Acquisition - Analog to Digital Converters (ADC) form the most basic and important interface between analog signals and the digital world. ADS826EG4 is an example of such a converter. This article explores the applications of the ADC and its working principle.

Application Field of ADS826EG4

The ADS826EG4 offers high performance for data acquisition systems that support its low output jitter. This ADC is suitable for a wide range of applications such as industrial measurement, communications systems, medical instruments, avionics and automotive test systems. This is because of its low power consumption, high extensibility, low-voltage requirements and the ability to operate from a single or multiple supply voltages.

The 16-bit, 1.15-V ADC has up to 5.5-MHz of throughput and up to 1.6-MHz of sampling rate with 66-dB signal-to-noise ratio (SNR) and ±0.75-LSB (max) of integral non-linearity (INL). The device also features a low-latency digital filter and programmable gain. This makes it suitable for applications where data acquisition must be done quickly and accurately with minimal noise.

The high-speed serial interface simplifies communications with the digital host, while the low-power shutdown and ultra low-power sleep modes reduce power consumption. The protection circuitry helps protect against overloads and out-of-range signals and ensures stable operation.

Working Principle of ADS826EG4

The working principle of the ADC is based on the voltage to frequency conversion. The input voltage is compared with an internal reference voltage which is then converted to a frequency. This frequency is then measured and the resulting digital value is then passed on to the output.

At the remote locations, the sample rate is the same regardless of the signal level present. The signal is then conditioned and sampled, then converted to raw binary or a digital code, depending on the data format. Subsequently, the data is sent to the host via the serial interface.

The data is formatted with a cyclic redundancy check (CRC) which helps ensure that data integrity is maintained. Subsequently, the data is transformed into a format suitable for further processing, analysis or storage by the host.

The power-saving features of the ADC, such as low-power shutdown and ultra-low-power sleep modes, help provide a stable power supply for data acquisition systems, which increases system performance and efficiency. This helps reduce the overall cost of the data acquisition system.

Conclusion

The ADS826EG4 is a high-performance ADC, featuring low power consumption, high-speed serial interface and low jitter. It is suitable for a wide variety of applications, such as industrial measurement, communications systems and avionics. Its working principle is based on the voltage to frequency conversion and the data is formatted with a CRC to ensure data integrity is maintained.

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