LTC2470IMS#PBF

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Data Acquisition – Analog to Digital Converters (ADC) play a vital role in many digital applications and systems. The LTC2470IMS#PBF is an integrated power monitoring analog-to-digital converter (ADC) that has been particularly designed for direct integration into high-side power monitoring systems. It is a low cost, low power, and high-precision, 18-bit sigma-delta ADC that provides accurate measurements of AC/DC currents, AC/DC voltages, and temperatures. It enables applications capturing upto 800Ksps conversion rate. This article discusses the application fields and working principle of the LTC2470IMS#PBF.

Application Field of LTC2470IMS#PBF

The LTC2470IMS#PBF ADC provides precise measurements of AC/DC currents, AC/DC voltages, and temperatures within the device. It is suitable for direct integration into high-side power monitoring systems. This makes the device ideal for use in a range of applications, such as:

• Indoor and outdoor lighting control systems
• Retail, industrial, and commercial data-logging systems
• Refrigeration and HVAC systems
• Power utility voltage and current monitoring
• Robotics and Automation Control

Working Principle of LTC2470IMS#PBF

The LTC2470IMS#PBF ADC operates on the principle of Indirect Increment (IIR) filter. On application of excitation, the signal is taken through a demodulator and post-gain amplifier connected to the converter, producing a signal gain of 107dB. On applying a voltage or current input to the ADC, a signal is produced by a low-noise differential input stage at the amplifier input referred to as the scaling block. This signal is then sent to a correlator where its information is compared to the reference voltage and a conversion cycle initiated. The ADC converts each successive bit in the data rate set to produce an 18-bit output. The conversion rate of the LTC2470IMS#PBF is programmed to any frequency between 0.14Hz and 800Ksps.

The LTC2470IMS#PBF is a sigma-delta ADC that works on the principle of successive approximation. This method has a sampling phase and an updating phase. In the sampling phase, the signal is filtered and measured at each clock cycle and compared to a specified reference voltage. The result from this comparison is used to determine the most significant bit in the data rate and stored in the internal register. This process is repeated for each bit until the end of the conversion cycle. The updated phase implements the results of the sampling phase and latches the final digitized code.

Accuracy and Performance

The LTC2470IMS#PBF consumes extremely low power of 8.5mW when operated at a 40Ksps conversion rate. The output accuracy of the converter is ±0.5% (max). It has a wide range of dynamic range covering from 6 to 36V (VREF) and a wide input range extending up to ±0.2V. Its extremely low noise level ensures high accuracy measurement of any voltage or current input.

Conclusion

In summary, the LTC2470IMS#PBF is a low cost, low power, and high-precision, 18-bit sigma-delta ADC, which can accurately measure AC/DC currents, AC/DC voltages, and temperatures. Its wide input range, low noise and low power consumption, enable it to be integrated into a number of different applications requiring high-precision data acquisition and monitoring. The versatility of the ADC makes it an ideal choice for retail, industrial, and commercial data-logging systems, refrigeration and HVAC systems, power utility voltage and current monitoring, as well as robotics and automation applications.

The specific data is subject to PDF, and the above content is for reference