AD7858BR-REEL

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Data acquisition refers to the process of sampling signals or transducing physical quantities. Analog to Digital Converters (ADCs) perform the task of transforming analog signals into digital forms suitable for computer processing. The AD7858BR-REEL is a low power 8-channel multiplexed 10-bit analog-to-digital converter (ADC) with several features. This article focuses on the application fields and the working principle of the AD7858BR-REEL.

AD7858BR-REEL Application Field

The AD7858BR-REEL has been designed for various applications, such as electronic instrumentation, telecom, automation, and medical diagnosis. Additionally, its low power consumption makes it ideal for low-power portable applications. The 10-bit resolution and 8-channel multiplexed capability of the ADC make it suitable for applications where high resolution and multiple input signals may be required. Furthermore, the ADC\'s EMC robustness allows it to be used in industrial environments exposed to electrical noise, electromagnetic interference, and other power disturbances.

Working Principle of AD7858BR-REEL

When the Sampling enable (SE) pin is triggered, the ADC starts the analog-to-digital conversion process. First, the input signal is amplified by an internal amplifier and then applied to a sample-and-hold circuit. The sample-and-hold circuit captures the signal and maintains its level until the current conversion cycle is finished. After the sampling period, the analog signal is converted to 10-bit digital codes by an 8-bit flash converter. This 10-bit digital output is then stored in the output buffer, ready to be read by the system.

The AD7858BR-REEL features a wide supply range of 4.5 V to 15 V and two reference input options, allowing for operation on a single supply. It can also be powered from a 3 V backup battery when the main supply is off, allowing for low-power operation. Furthermore, the ADC has a low-power Standby mode, allowing for reduced power consumption when the device is not in use. The Standby mode can be enabled or disabled by an external control signal.

The AD7858BR-REEL also features a wide input range, allowing for input signals of up to ±10 V, ±5 V, and 0-5 V. Furthermore, the ADC features a low input offset voltage of 500 μV to ensure accurate operation. Additionally, the AD7858BR-REEL features a wide operating temperature range of -40°C to +85°C, allowing for operation in extreme environments.

Conclusion

The AD7858BR-REEL is a versatile 8-channel multiplexed analog-to-digital converter, capable of operation on a single supply and with two reference input options. The wide input range, low voltage offset and low power consumption makes it ideal for a wide range of applications, such as instrumentation, telecom, automation and medical diagnosis. Additionally, its wide operating temperature range ensures reliable operation in extreme environments.

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