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Data Acquisition - Analog to Digital Converters (ADC)

Introduction

AD7467BRTZ-REEL is a 12-bit, simultaneous sampling analog-to-digital converter (ADC) that integrates a high performance amplifier and multiplexer. It provides excellent SNR and minimum sample-and-hold error. It is suitable for a wide range of applications including data acquisition systems, imaging systems, medical instrumentation and industrial/automotive systems.

Application Field

AD7467BRTZ-REEL is ideal for applications that require sampling and quantization of multiple analog signals so that they can be digitized and processed. It is widely applied in robotics, computer-controlled industrial automation, safe communication systems and data acquisition systems. In addition, it is also suitable for applications such as medical imaging systems, ultrasound systems and in-car multimedia systems.

Features and Advantages

• High performance: Excellent SNR, minimum sample-and-hold error and low noise.
• High resolution: 12-bit resolution.
• Wide dynamic range: The maximum conversion rate is 4Msps.
• Wide input range: The input range can be adjusted from 0V to 3.6V.
• Low latency: The latency is only 8 clock cycles.

Working Principle

AD7467BRTZ-REEL uses a differential input topology to reduce noise and improve SNR. The data is clocked in using a low frequency clock, usually less than 15MHz. The 12-bit data is read out in the data output register in 5 clock cycles. The digital output values are latched in the output register after the 5th cycle.

The amplifier comprises a differential input and a gain stage. It is capable of supplying sufficient current for fast settling input signals. After the amplifier, the fully analog signal is routed to the input multiplexer, which is to multiplex the analog inputs and route them to the successive approximation register (SAR). The SAR then searches for the ideal value. This data is later accumulated in a data output register, from which the result is latched and available in the DOUT pins (data output pins).

Conclusion

AD7467BRTZ-REEL is a highly versatile ADC with a wide variety of applications ranging from data acquisition to medical imaging. It is capable of sampling and converting analog signals at very high rates while maintaining high accuracy and low noise. The high resolution and wide dynamic range makes it suitable for a wide range of applications.

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