LTC2157IUP-14#PBF

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Data acquisition applications often require analog to digital conversion to be performed in order to accurately measure a variety of physical phenomena, including temperature, pressure, electrical current, and voltage. The LTC2157IUP-14#PBF is a 14-bit ADC designed to achieve accurate, high speed, and low power performance when converting analog signals into digital signals. In this article, we’ll take a look at the application fields and working principles of the LTC2157IUP-14#PBF.

Application Fields

The LTC2157IUP-14#PBF is suitable for applications that require high accuracy, high speed, and low power consumption. It is commonly used in industrial and consumer applications, such as automated test equipment, robotics, data acquisition systems, and medical imaging equipment. It is also suitable for applications requiring very small form factors, such as consumer electronics, automotive systems, and industrial controls.

The LTC2157IUP-14#PBF features an exceptionally low residual differential non-linearity (RDN) of just 190µV, which makes it a particularly good choice for applications that require high precision measurements. It has a wide range of voltage supply, from 4.75V to 36V, and power consumption is a low 0.8mW in active mode and 5µW in power-down mode.

Working Principle

The LTC2157IUP-14#PBF uses delta-sigma modulation to convert analog signals into digital signals. Delta-sigma modulation is used in a variety of applications, including audio and radio receivers, but it is particularly suitable for high-precision ADCs.The ADC uses an oversampling conversion process which involves converting a continuous analog signal to a discrete equivalence by sampling the signal a large number of times, at a higher rate than the Nyquist rate. This method helps to achieve better resolution and higher SNR than with traditional ADC architectures.The LTC2157IUP-14#PBF then applies delta-sigma modulation to the oversampled signal to produce a low-frequency continuous digital signal. The output of the delta-sigma modulator is then filtered, decimated, and digitizes the signal to produce a 14-bit resolution digital output sample.

The ADC has a sampling rate of 200kHz and is capable of converting signals with a frequency range of 0.1Hz to 40kHz. It features an extra high-speed input amplifier and includes two user selectable reference source options, from the internal reference or from an external source. It also features a continuous settling time of 2µs and a low distortion of -65dB THD (Typ).

Conclusion

The LTC2157IUP-14#PBF is a 14-bit ADC that is capable of achieving accurate and high-speed analog-to-digital conversion at low power. It is suitable for a wide range of applications, from industrial and consumer electronics to automotive systems and medical imaging equipment. It uses delta-sigma modulation to convert analog signals to digital signals, and has a sampling rate of 200kHz with a frequency range of 0.1Hz to 40kHz. With its wide range of features and its excellent power efficiency, the LTC2157IUP-14#PBF is a great choice for applications requiring analog-to-digital conversion.

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