AD7248AQ

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Data Acquisition - Digital to Analog Converters (DACs) are one of the most important components of a Data Acquisition system. They convert digital signals into analog signals, making it possible to measure a physical quantity such as temperature, pressure or position digitally. The AD7248AQ is a high-performance, low-power, 8-channel, 16-bit, 1-MSPS DAC, which features an excellent dynamic range and very low distortion. The AD7248AQ is suitable for applications that require precision measurement, including medical instruments, industrial process control, automotive test and measurement, and consumer equipment.

The AD7248AQ has an on-chip 8-channel analog multiplexer (mux), allowing the user to select any one of the 8 input channels from one of the 4 MOSFET switches. The 8 channels can range from 0V to 5V for unipolar input, 0V to 10V for bipolar, and -2.5V to 7.5V for unipolar input. The multiplexer can be programmed through a programmable logic device (PLD). In addition, the AD7248AQ features a digital input test port, allowing the user to enable or disable each of the 8 channels individually.

Furthermore, the AD7248AQ has an on-chip low-noise and low-distortion, low-power voltage reference. The reference voltage can be adjusted by the user with a simple two-wire interface. The output of the AD7248AQ is current-driven, and can drive currents up to 25mA. The output current range can be programmed to the desired level. The AD7248AQ is designed to operate over a wide supply voltage range, from 3.3V to 5.5V. The power consumption of the device is only 6.3mW, making it ideal for battery-powered applications.

The AD7248AQ utilizes a CMOS-based implementation of a delta-sigma modulator. In this type of implementation, the analog input signal is sampled and converted into a multi-bit digital code. The digital code is then used to generate a delta-sigma modulated signal which is a low-pass filtered signal used to drive the output of the DAC. The delta-sigma modulator is used to reduce errors and improve linearity in the analog signal by averaging out the errors. The delta-sigma modulator also reduces the noise of the signal.

The AD7248AQ has an on-chip error correction algorithm which is used to correct errors in the signal before the signal is sent to the output of the DAC. The error correction algorithm uses a look-up table which is programmed by the user. The AD7248AQ also has an on-chip power-on reset circuit which keeps the converter in reset until the power supply has stabilized.

The AD7248AQ is an ideal choice for applications that require precision measurement, such as medical instruments, industrial process control, automotive test and measurement, and consumer equipment. The device\'s low-power consumption and excellent dynamic range make it well-suited for portable and battery-powered applications. The on-board voltage reference, low-noise analog multiplexer, and error correction algorithm also make the AD7248AQ an ideal choice for precision analog-to-digital conversion.

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