MAX295ESA+

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Filter Type:	Butterworth, Low Pass Switched Capacitor
Frequency - Cutoff or Center:	50kHz
Number of Filters:	1
Filter Order:	8th
Voltage - Supply:	4.75 V ~ 11 V, ±2.375 V ~ 5.5 V
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	MAX295

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MAX295ESA+ Application Field and Working Principle

Introduction

The MAX295ESA+ is an active filter from Maxim Integrated, designed for signal conditioning and signal isolation applications in many industries, ranging from commercial and industrial to automotive and medical. It is particularly suitable for filtering audio and data signals, as well as for signal isolation. This article discusses the application field and the working principle of the MAX295ESA+ in detail.

Application Field of the MAX295ESA+

The MAX295ESA+ is a signal conditioning and signal isolation filter optimized for properties such as signal integrity, cost and size in order to meet the requirements of many applications. It offers multiple advantages over conventional active and passive filters, particularly in terms of its low pass-band frequency and high stop-band frequency performance. Its low pass-band frequency enables it to filter out high-frequency noise from a signal, while its boosted stop-band frequency allows it to reject undesirable signals which are outside its pass-band.The MAX295ESA+ can be used in a wide range of applications, including commercial and industrial, automotive, medical and consumer electronics. It can be used to condition signals in electronic equipment such as amplifiers and audio systems, as well as in applications such as Industrial Ethernet, mobile phones, smart meters and medical devices.

Working Principle of the MAX295ESA+

The MAX295ESA+ is based on a switched capacitor filter (SCF) topology. This topology is used to achieve sharp cut-off frequency edges, a low pass-band ripple and high rejection factor across the entire operating frequency spectrum. The SCF topology relies on the use of capacitors in various configurations, such as one-pole, two-pole and multiple pole, to achieve its desired filtering performance. In the MAX295ESA+, a pair of three-pole switched capacitor filter networks are used. These networks are controlled independently from each other and have different filter characteristics, allowing for different functions within the same filter.The filter networks of the MAX295ESA+ can be configured for a low pass-band, to limit the maximum frequency of the applied signal, a high pass-band, to reject certain frequencies from the data stream, and a band stop-band, to reject a fixed frequency range while passing all others. The MAX295ESA+ can also be used as an audio filter, to remove unwanted high- frequency noise from a signal.

Conclusion

The MAX295ESA+ is an active filter designed for a wide range of signal conditioning and signal isolation applications. It uses a switched capacitor filter (SCF) topology to achieve a low pass-band frequency and high stop-band frequency performance, while providing configurable filters for low pass-band, high pass-band and band stop-band operations. The MAX295ESA+ is suitable for applications such as audio and data signal filtering, as well as signal isolation.

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