AD421BR

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AD421BR, a 4-channel 16-bit digital-to-analog converter, is primarily used for high accuracy and high resolution signal conditioning applications in data acquisition and control systems. Each channel can be programmed with absolute and relative gains, offset, and scaling. The AD421BR\'s high resolution and broad programmability make it ideal for applications such as analog circuitry, laboratory automation, medical equipment, and industrial process control.

The AD421BR is a high-performance, low-cost, low-power, integrated circuit composed of four 16-bit digital-to-analog converters, driven by quad rail-to-rail input, output amplifiers, and 10-MHz clock synthesizers. Its low power requirements make it ideal for battery powered applications. The AD421BR has a wide dynamic range, providing accurate and reliable operation in multiplexed systems. It has a wide input range of 7.5 to 16.5V and can run from both single and dual supplies.

The AD421BR\'s high-resolution and programmability give it the ability to perform both precision and dynamic signal conditioning. The digital-to-analog converters are able to provide up to +/- 5 LSB accuracy, which is typically the same as the output of its predecessor, the AD421. Despite its 16-bit resolution and accuracy, the AD421BR consumes only 1.4 mA at 16-bits and with a 5V supply.

The working principle of the AD421BR is based on a delta-sigma modulator. Its Delta Sigma modulator is composed of an analog to digital converter (ADC), an anti-aliasing filter, a decimator, and a digital to analog converter (DAC). First, the analog signal is converted to a digital signal using the ADC. Then, the anti-aliasing filter removes the high-frequency noise. Next, the decimator reduces the sampling rate to the desired rate. Finally, the digital signal is converted back to analog using a DAC which is tied to the output pins of the AD421BR. This approach allows for a high resolution digital-to-analog converter at a relatively low cost.

The AD421BR is a versatile device and can be used in a variety of applications, from signal conditioning applications to automotive, communications, industrial instrumentation, medical imaging, and measuring applications. Its low power requirements and high performance features make it ideal for the most demanding applications. Its user-friendly programming and setting of gains, offset and scaling makes it easy to configure for the most complex tasks. It is suitable for use in multiplexed systems, providing accurate and reliable operation.

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