ADS7841PB

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Data Acquisition - Analog to Digital Converters (ADC) is an integral part of many aspects of modern life and most areas of industry. With its rapid technological development, it has become even more ingrained within our everyday lives, making it an essential component in many applications. The ADS7841PB is an application specific, high performance, low power, analog-to-digital converter (ADC) designed for single-supply systems and is supported by high-performance data conversion, depending on the system\'s requirements.

Features

The ADS7841PB is capable of providing high speed data conversion of up to 18-bits resolution at 2 MSPS and a total dynamic range of 80 dB. Furthermore, it is capable of providing an excellent SINAD performance of 80 dB across these 18-bit data conversions. It also features a differential input stage to offer further noise rejection and stability.

This ADC also features two differential outputs: an analog output for data validation and a digital output for data transfer. Additionally, it features a flexible architecture which allows for multiple channel configuration allowing it to be deployed in both single-ended and differential linear systems.

Applications

Due to its high resolution, wide dynamic range and low power requirements, the ADS7841PB is well suited for a large number of applications. Some general examples are:

• Automotive systems, in applications such as powertrain control, engine control and body electronics.
• Industrial systems, including process control, vending machines and automated test systems.
• Communication systems, used in military and commercial systems where image recognition is necessary.
• Medical equipment, ranging from vital sign monitors to hearing implants.
• Telemetry systems, for measuring data from engines, turbines or remote locations.

Working Principle

The Readout Interface (ROI) of the ADS7841PB separates the analog and mixed-signal circuitry from the digital domain, allowing for a higher level of performance and multi-channel operation. The device is based upon the principle of sampling and conversion, which involves two separate processes: sampling of the analog signal and conversion of the digital values.

In order to sample an analog signal, the ADS7841PB utilizes an analog-to-digital converter based on the Successive Approximation Register (SAR). The SAR compares the analog input with an internal reference voltage and is capable of performing up to 9-bit conversions each conversion cycle. The data is then compared to the internal reference voltage; if it is larger then the reference voltage, a logic 1 is outputted and a logic 0 otherwise. This process happens in several cycles, with each cycle producing a new bit of data.

For the conversion into digital values, the device features a high-performance digital signal processor. This digital signal processor performs the necessary calculations on the incoming data, taking into account the sampling rate, dynamic range and other user-defined parameters. It then converts the analog information into digital values that can then be read by the system.

In this way, the ADS7841PB provides a high-performance, low-power, high-resolution solution for data conversion applications. With its flexible architecture, it can be deployed in a variety of systems and applications, providing an excellent performance and reliable operation.

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