AD7891APZ-2REEL

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Data Acquisition - ADCs/DACs - Special Purpose

The AD7891APZ-2REEL is a special purpose, low-power 8-bit analog-to-digital converter (ADC) with integrated track-and-hold and 10 μA range operation. It is ideal for weighing scale, medical instrumentation, and other automated test system applications. This converter incorporates a differential capacitor array input a voltage reference, and a 10-bit sigma-delta ADC with a serial data interface. In addition, the AD7891APZ-2REEL is available in 8-pin narrow SOIC and 8-ball White LED VFBGA (EMD) packages.

The AD7891APZ-2REEL offers a flexible input range that supports single or dual supply designs. The input range is set by a resistor divider and comprehensive internal protection features make it suitable for applications requiring a wide range of voltage programmability. The integrated track-and-hold offers immediate acquire with no settling delay, which simplifies the test system architecture.

The serial data interface allows for communication with the AD7891APZ-2REEL from any compatible serial protocol. The data is clocked in and out of the serial interface with a 100 kHz to 10MHz clock, allowing for data to be transferred quickly and efficiently. The integrated precision reference ensures data accuracy across the entire temperature range.

The AD7891APZ-2REEL offers a wide dynamic range with a Noise Figure of 82dB. The converter also incorporates an Anti-Aliasing filter and varied DAC and op-amp circuitry to ensure that signals are accurately acquired. In addition, the ADC has independent gain and offset adjustments which allow for accurate scaling and biasing of input signals. These adjustments can also be used to improve nonlinearity performance.

The AD7891APZ-2REEL also features a continuous self- calibration feature, which automatically performs background corrections to remove any errors that may occur in the signal. This feature allows for minimal system downtime and improved reliability and performance. Additionally, the onboard watchdog timer and conversion result register enable the AD7891APZ-2REEL to be used for the creation of sophisticated automation or closed loop systems.

The AD7891APZ-2REEL is designed for use in industrial and consumer applications that require precision data acquisition from multiple channels in a low power environment, and its comprehensive features make it a perfect fit for any application.

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