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Data Acquisition - ADCs/DACs - Special Purpose

The AD7891ASZ-2 is a low power, 10-bit, low-noise, high-speed, serial-input ADC from Analog Devices. This SAR-type analog-to-digital converter (ADC) provides high accuracy and linearity in a compact QFN package. Designed for use in medical and industrial applications, the AD7891ASZ-2 operates with a high speed conversion rate of 20 Msps and a low power consumption of only 180 mW.

The AD7891ASZ-2 operates from a 3.3V supply and can handle input voltages ranging from 0 to 5V. It is ideal for applications requiring sampling of high resolution, low noise signals as it combines low cost and high performance into one integrated package. The device utilizes an on-chip, charge redistribution timing scheme and advanced SAR architecture that achieves low intrinsic noise and linearity errors.

The AD7891ASZ-2 has an input range of -2.5 to +2.5V, which can be further adjusted using external resistor dividers. The inputs can also be configured for single-ended 0V to 5V, or differential ±2.5V. Both of these configurations offer excellent accuracy and linearity.

The AD7891ASZ-2 contains an on-chip voltage reference and a temperature-compensated clock oscillator that allows for precise sampling times. The integrated self-calibration feature allows the ADC to accurately measure the input signal while compensating for the device\'s gain and offset errors.

The AD7891ASZ-2 can be programmed to accept multiple outputs, including 10-bit digital output, 8-bit parallel output, and 8-bit serial bit stream output, making it versatile and ideal for medical instrumentation, industrial and commercial data acquisition applications. The device also has a built-in programmable gain amplifier (PGA) that can be used to amplify small signals prior to conversion.

The AD7891ASZ-2 is an ideal solution for battery-powered, low-noise, low-power applications. Its 10-bit resolution and high sampling rate makes it ideal for medical instrumentation, industrial and commercial data acquisition, and other precision sensing applications.

The device is also a great choice for portable instruments, such as portable ECG/EKG machines, pulse oximeters and blood glucose meters, as its low power consumption allows for extended battery life.

In summary, the AD7891ASZ-2 is a high performance ADC with excellent features, such as low power consumption, high linearity, and high-speed conversion rate, offering a great solution for various data acquisition applications.

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