LMP93601NHZR

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Data acquisition systems often require a means to acquire and measure analog signals. The Analog Front End (AFE) is the mechanism for achieving this. An AFE is responsible for conditioning the signal prior to digitization, providing amplification, filtering, and other functions necessary for proper signal acquisition. The LMP 93601NHZR is an AFE that uses advanced signal processing to provide a range of analog conditioning functions. Here the application fields and working principles of the AFE are discussed.

Application Field

The LMP 93601NHZR Analog Front-End is a single-channel, precision, low-power sensor interface that is designed to provide high-resolution signal conditioning for a variety of analog-to-digital conversion (ADC) applications. It is a member of Texas Instruments\' Automotive Analog Front-End family, which is designed to simplify the design of sensing systems with features such as integrated ADC support, low-power operation, and precision data acquisition.

The AFE is designed to reduce the size and complexity of systems requiring signal conditioning for high-precision ADC. It is suitable for applications such as industrial controllers, blood pressure monitors, and other medical systems that require high-accuracy signal measurements. Additionally, the AFE is capable of supporting piezoelectric-, strain gage-, and thermistor-based sensing systems.

The AFE is also capable of supporting multiple signal paths, including those from accelerometers and pressure sensors. It is optimized for automotive applications that require precise measurements for in-vehicle networking, control, and security systems. These applications include engine control, vehicle diagnostic, electronic stability control, and remote keyless entry.

Working Principle

The AFE has two signal conditioning paths, which provide a range of front-end signal conditioning functions. In the signal signal path, the AFE provides a programmable gain amplifier to scale the signal magnitude and a low-pass filter to reduce the signal noise. The signal is then passed on to the ADC for digital conversion. In the second signal path, the AFE provides a programmable amplifier to amplify the signal and a low-pass filter to reduce noise. Both signal paths are able to simultaneously measure a signal from the same source at different gains.

The AFE offers a complete solution for high-precision signal conditioning for ADCs, enabling precision measurement for a variety of applications. It also provides a wide range of flexibility in terms of gain, frequency response, offset, and much more. This flexibility allows for customization for different applications, making the AFE an ideal solution for a variety of sensing systems.

The AFE also supports Auto-Offset Calibration (AOC). This feature compensates for any DC-offset error during environmental temperature changes. The AOC allows for precise sensor offset compensation, resulting in more accurate signal measurements.

The AFE is highly integrated and optimized for low-noise performance. It has an integrated, low-power Current Shunt Measuring(CSM) architecture that consumes less than 0.4 mA, which is about one tenth of thes power consumption of other AFEs. The design also includes a low-noise high-speed throughput path, which increases the signal-processing speed.

The AFE also includes an internal voltage follower that can be used in conjunction with the ADC to decrease the number of required analog components. Additionally, the AFE supports spread-spectrum clocking modes, which are useful in applications with stringent EMI requirements. These features reduce the number of external components, resulting in reduced board space, costs, and system complexity.

Conclusion

The LMP 93601NHZR is an excellent choice for a wide variety of sensing systems requiring precision signal conditioning and low-power operation. It offers an integrated solution that reduces cost, space, and complexity. With features such as programmable gain, adjustable frequency response, AOC, and spread-spectrum clocking, the AFE is highly configurable for various sensing applications. This makes it an ideal choice for in-vehicle networks, medical systems, and industrial controllers.

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