AD7887BR-REEL

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Data acquisition is a crucial step to capturing valuable data in modern industries. Analog to Digital Converters (ADC) are the essential component of data acquisition systems, as they enable the conversion of analog signals into digital signals, which can be further analyzed with computer applications. As an Analog to Digital Converter, the AD7887BR-REEL offers high resolution (8-bit) conversion for low power and low voltage operations, making it a great choice for both commercial and industrial applications. Here, we will present an overview of the application field and working principle of the AD7887BR-REEL.

Application Field

The AD7887BR-REEL features low voltage operation, low operating current (0.5mA), and an 800 kHz conversion rate. Its high resolution - up to 8-bit - makes it suitable for use in various applications including industrial process control and monitoring, telecommunication, scientific research, and military use. The AD7887BR-REEL can be used for the conversion of various analog signals including thermocouple, pressure, current, AC line voltage signals, and more.

The AD7887BR-REEL can also be used with low voltage single supply (as low as +2V)or dual supply operation. It is offered in a tiny 8-pin plastic DIP package, allowing for easy installation. Additionally, it operates over a wide range of temperatures (-40°C to +105°C).

Working Principle

The AD7887BR-REEL is a CMOS-based converter that can quickly and accurately convert analog input signals into digital data. The device is designed to operate over a single supply range (2V to 5V). It can also operate with a dual supply and provide a true differential input range.

At the core of the device, is the analog-to-digital conversion process which is done through the use of either a successive approximation or external voltage reference technique. The successive approximation technique is used when single supply operation is needed. Here, the SAR (Successive Approximation Register) dynamically tracks the voltage of the input signal and successively compares and sets the bits of the output until an exact match is reached. In the dual supply operation mode, an external voltage reference is used for the conversion process. Here, the reference voltage is supplied to one of the two input channels, and the analog input voltage is compared to the reference voltage for conversion.

The AD7887BR-REEL provides several additional features to make it a great choice for low power and low voltage applications. The device can be configured with either one or two differential inputs. The device also features an auto power down mode, which allows it to be configured to automatically enter power down mode when not in use in order to reduce power consumption. Additionally, the device offers a serial data output via SPI or MICROWIRE, making it easy to interface with a microcontroller or external digital logic.

In conclusion, the AD7887BR-REEL is a robust analog to digital converter which offers excellent performance in low voltage and low power applications. Its high resolution up to 8-bits makes it perfect for use in a variety of industrial and commercial applications. Additionally, its low operating current and its ability to automatically enter power down mode make it a great choice for energy-conscious applications.

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