Maxim Integrated's MAX294EWE - 8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters

The MAX294EWE from Maxim Integrated is a highly integrated 8th-order, lowpass, elliptic, switched-capacitor filter that delivers a precise filtering solution for a wide range of applications. This compact and efficient component is housed in a 16-SOIC wide package, making it suitable for space-constrained designs.

Designed to operate with a single +5V supply, the MAX294EWE offers a pre-tuned 50kHz or 100kHz corner frequency, which can be adjusted up to 200kHz or more by external clocking. Its 8th-order elliptic lowpass response provides excellent selectivity with a sharp roll-off and a stopband attenuation of -65dB, ensuring that unwanted high-frequency noise and signals are effectively suppressed.

The filter's architecture is built around a cascade of four 2nd-order sections, each with its own on-chip auto-tuning circuit. This ensures stability and performance over temperature and process variations. The MAX294EWE also features a clock-tuning range of 50:1, allowing for a wide range of input frequencies. Additionally, the component can be put into a low-power mode, reducing the supply current to save energy when the filter is not in active use.

With its fully differential design, the MAX294EWE provides improved noise immunity and is ideal for applications requiring a high degree of signal integrity. This makes it a perfect fit for anti-aliasing before A/D conversion, post-DAC filtering, spectrum analyzers, and other signal processing tasks that necessitate precise lowpass filtering capabilities.

For design flexibility, the MAX294EWE can be cascaded with other filters to achieve higher-order filtering responses. This feature, along with its robust design and ease of use, ensures that the MAX294EWE stands out as a reliable and versatile component in the Maxim Integrated product portfolio. Whether used in professional audio equipment, data acquisition systems, or communication devices, the MAX294EWE provides a high-performance filtering solution that designers can trust.