AD9245BCPZRL7-20

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Data Acquisition - Analog to Digital Converters (ADC) are one of the most important devices when it comes to data acquisition. They allow signals in analog form to be converted into digital signals, which can then be interpreted and analyzed by a computer. The AD9245BCPZRL7-20 is a 16-bit ADC converter. It has an input sampling rate of up to 1 MHz, and a bandwidth from DC (0 Hz) to 20 kHz.

AD9245BCPZRL7-20

The AD9245BCPZRL7-20 is a low cost, low power 16-bit ADC which is designed for applications that require performance, reliability and small form factor. It is capable of direct conversion from low cost single-ended analog signals and is capable of both unipolar and bipolar input ranges. The ADC also features built-in gain and offset error correction, making it ideal for industrial, medical, and test and measurement applications. The device has a Selectable Single-Ended Input Series- A/D converter with a Low Input Ranges of ±12.288 mV. It is also equipped with a Bipolar Input Series A/D converter with a Low Input Ranges of ±12.288 mV. It also has a fast output SPI-compatible serial interface.

Working Principle

The AD9245BCPZRL7-20 employs a differential input architecture with a low-noise programmable gain amplifier (PGA) and an offset correction to minimize system gain and offset error in the input signal. The PGA gain is selectable from +1 to +128, or +1/2 to +64 depending on the selected unipolar or bipolar mode. The converter has a built-in programmable reference buffer and an internal reference of 2.048V. It is capable of single-ended or differential input. The device has a high sampling rate and output data rate up to 1Msps, depending on the resolution and speed requirements.

To start conversion, a high speed clock is first applied at the CNV terminal to start an internal conversion clock (ICC). Then, a digital logic signal is applied to the corresponding digital architecture logic gates on the ADC input. This signal is then multiplied by the PGA gain and then converted into an analog signal. The analog signal is then inputted into the internal single-ended input and then a differential signal is formed between the two ADC inputs, given by VINp−VINn. This differential signal is then digitized through an internal A/D converter. The converted data is then outputted after all conversion stages have been completed. The output data is then synchronized with the internal ICC signal, given by 1 bit for every clock period.

AD9245BCPZRL7-20 Application Field

Given the specifications of the AD9245BCPZRL7-20, it is well suited for industrial, medical and test and measurement applications. It is particularly useful in applications where low power requirements, high accuracy and small form factor are required. Examples of such applications include process measurement, medical imaging, process control, test and measurement, robotics and communication systems. One such application is a medical imaging system, where the ADC can be used to digitize the analog signals coming from medical imaging equipment such as X-ray and MRI machines. The ADC can also be used to convert analog data from sensors in robotics applications, and from communication systems such as radio and satellite receivers. In addition, it can be used in industrial process control systems to monitor and control multiple parameters at once.

The AD9245BCPZRL7-20 is a reliable, low cost and low power ADC which can be used for a wide range of applications. It is capable of single-ended or differential input and is capable of both unipolar and bipolar input ranges. Its high sampling and output data rate, combined with its built-in gain and offset correction and small form factor, make it an ideal device for many industrial, medical and test and measurement applications.

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