AD7863BR-3REEL

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Data Acquisition - Analog to Digital Converters (ADC) - AD7863BR-3REEL

Analog to Digital Converters (ADC) typically take an analog voltage as an input and will convert this voltage into a binary digital output. The AD7863BR-3REEL is a high precision, high speed, low-power monolithic low-voltage analog-to-digital converter (ADC). This device, from Texas Instruments, was designed for a wide range of voltage input types and offers conversion rates up to 40 Million Samples per Second (MSPS).

This powerful and versatile device is targeted for highly accurate and reliable industrial control and measurement applications, medical and healthcare instrumentation, electrical power conversion systems, and data acquisition systems. The precision and speed of the AD7863BR-3REEL make it an ideal solution for these applications and is supported with a wide range of peripheral features, designed to make sure that the data acquisition and conversion process is quick and accurate.

Features

The AD7863BR-3REEL is available in a 16-pin small-outline integrated circuit (SOIC) package and a 3mm x 3mm LFCSP package. The features of the device include the following:

• High Resolution: 14-bit resolution, encompassing 16,384 levels of conversion available.
• High Speed: Conversion rate of up to 40 MSPS.
• Low Voltage Range: An input voltage range of 0V to 3.6V is supported.
• Level Shifters: Integrated Level Shifters make the device compatible with Analog inputs from the mV to 3.6V range.
• Analog Input: A single-ended input is supported, as well as a differential input.
• Reference: Internal or external references can be used, and the AD7797BR-3REF also offers a precision 3.2V reference.
• Power: Low power consumption and very low standby power makes the device suitable for mobile applications.
• Dynamic Performance: A low differential nonlinearity (DNL) of 0.2 LSB, high linearity of 0.5 LSB with temperature drift as low as 0.0005LSB/°C ensure excellent results.

Operation and Working Principle

The AD7863BR-3REEL uses “pipeline architecture” to accomplish its incredibly fast conversion rates. This architecture splits the conversion process into 3 stages: the input stage, the main conversion stage, and the digital post-processing stage.

In the Input stage, the device pre-charges the analog input to the reference voltage. Then, the internal sample-and-hold circuit is switched to allow the input voltage to be read. To achieve the most accurate reading, differential gain and offset errors are reduced using an analog correction circuit.

In the Main Conversion stage, an underlying switched-capacitor SAR architecture is used. This stage is powered by a fast internal clock and is divided into 2 parts: conversion core part and A/D interface. The conversion core part performs the conversion of data at a much higher speed, and the A/D interface executes decision, completes coding of the data, and handles interfacing with external devices.

In the Digital Post-Processing stage, the digitally processed data is outputted. Depending on the input type and output data format, the internally generated digital signals can be used to output the digital data in 8-bit (12 bit) complement, BCD, binary, or another predetermined code.

Applications

The AD7863BR-3REEL is an ideal choice for applications that require fast and accurate data acquisition and conversion. Some of the most important uses for this device include, but are not limited to:

• Industrial control and measurement applications, such as factory automation and process control.
• Medical and healthcare instrumentation, such as patient monitoring, uncharacterized fluid analysis, and respiratory therapy.
• Data acquisition systems, such as for real-time or closed loop control.
• Electric power conversion systems, such as automotive systems and electrical power conversion equipment.
• Other high precision and high speed applications.

Conclusion

The AD786BR-3REEL is a high performance, low power analog to digital converter (ADC). Its combination of high-speed conversion, high resolution, and low voltage range make it an attractive option for a variety of applications. Additionally, its superior accuracy is conferred by its advanced architecture and various peripheral features, making it one of the best ADCs available.

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