AFE0064IPBKR

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Introduction

Analog Front End (AFE) often referred to an acquisition system, which is essential in data acquisition and signal processing. The ABE0064IPBKR refers to one of the Analog Front Ends developed by Texas Instruments (TI). This application field and working principle of ABE0064IPBKR will be discussed in the following sections.

Application Field

ABE0064IPBKR is a high precision, low noise, low power, 16-bit ADC (Analog to Digital Converter). It is specifically designed to focus on biomedical signal acquisition and process. With a flexible programmable gain amplifier and a differential single ended signal acquisition path, it is suitable for ECG, EEG and respiration signal acquisition. In addition, the low power monitor featuring with ABE0064IPBKR utilizes power shut down for adjacent channels and micro-power sleep mode for other channels, providing excellent power saving feature for applications powered by battery.

Working Principle

ABE0064IPBKR utilizes a highly integrated data acquisition system which consists of a Programmable Gain Amplifier (PGA), a Signal Path Multiplexer (MUX), a Low Power Monitor (LPM), a Phase-Locked Loop (PLL) and a 16-bit clocked Analog to Digital Converter (ADC).

The PGA is responsible for signal amplification. It provides an adjustable gain in the range of 0-1000 times. It is possible to obtain greater signal amplitude and louder signal by increasing the gain, making the signal more distinguishable in certain applications such as ECG, EEG and respiration signal.

The MUX helps to ensure that noise is kept within acceptable range. With multiple input channels, it allows signal from different channels to be sampled simultaneously at the same time which greatly improved signal accuracy.

The LPM supports power shut down for channels that are not in use, providing power saving feature for applications powered by battery. It also provides an automatic power up feature. When signal is detected. All active channels will be powered up automatically.

The PLL is responsible for providing an internal clock signal to ADC. It is required to ensure that sampling rate is accurate and consistent, providing proper power.

The ADC performs the actual signal acquisition and converts the analog signal into digital signal. It is connected to the PLL via SPI (Serial Peripheral Interface).

Conclusion

In summary, ABE0064IPBKR is a highly integrated data acquisition system developed by Texas Instruments (TI). With its low power consumption, high accuracy and adjustable gain feature, it is suitable for biomedical signal acquisition and processing applications such as ECG, EEG and respiration signal.

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