AD7892BRZ-2

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Data Acquisition – Analog to Digital Converters (ADC) is a technology that allows analog signals to be converted into digital signals. The AD7892BRZ-2 is an integrated 8-bit analog-to-digital converter (ADC) with excellent linearity and low power consumption. It is part of the AD7892 family of mixed-signal data acquisition products from Analog Devices. This application note will explore the application field and working principle of the AD7892BRZ-2.

Features and Benefits of AD7892BRZ-2

The AD7892BRZ-2 features a linearity of 4 LSB (least significant bit) maximum and a dynamic range of 6 bits. It has a power supply voltage of between 2.7 V and 5.5 V and a digital input voltage range of 0 V to VDD. It is equipped with a 3-Wire Serial Interface (SPI) which allows it to be integrated easily into a digital system. The AD7892BRZ-2 provides further benefits such as a temperature range of -40°C to 85°C and no external components.

Application Field of AD7892BRZ-2

The AD7892BRZ-2 is primarily used for data acquisition and data conversion applications. The ADC is suitable for medium to low speed and low power applications, particularly those where low noise performance is essential (e.g. healthcare and consumer electronics). Furthermore, the device can be used in a variety of medical monitoring, industrial automation and consumer applications.

Working Principle of AD7892BRZ-2

The AD7892BRZ-2 converts an analog signal of 0 V to 5.5 V into a digital signal, which is equivalent to the number of bits of resolution (8 bits). It has an integrated reference voltage of 1.225 V with an absolute accuracy of 1.22 V. The device is configured to convert the analog signals through the digital interface. The device has a two-step conversion process. The first step is the signal conditioning stage in which the analog signal is amplified and filtered to minimize noise and reduce signal distortion. The second step is the actual conversion of the signal, which is done by the 8-bit ADC. The 8-bit ADC has an output of 8 bit data with a resolution of 0.879 mV/LSB (least significant bit). The device can provide a maximum throughput rate of 68kSPS (Samples Per Second).

Conclusion

The AD7892BRZ-2 is a high-resolution 8-bit ADC suitable for medium to low speed data acquisition and data conversion applications. The device has an integrated reference voltage of 1.225 V with an absolute accuracy of 1.22 V, and a 3-Wire Serial Interface (SPI) to make it easy to integrate into a digital system. The device’s linearity of 4 LSB and a dynamic range of 6 bits are great for medium to low speed, low noise applications. Its throughput rate of up to 68kSPS makes it ideal for applications such as medical monitoring, industrial automation and consumer electronics.

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