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MAX7491 Datasheet Dual Universal Switched-capacitor Filters

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-1768; Rev 1; 4/09 Dual Universal Switched-Capacitor Filters MAX7490/MAX7491.

General Description

The MAX7490/MAX7491 consist of two identical lowpower, low-voltage, wide dynamic range, rail-to-rail, 2nd-order switched-capacitor building blocks.

Each of the two filter sections, together with two to four external resistors, can generate all standard 2nd-order functions: bandpass, lowpass, highpass, and notch (band reject).

Three of these functions are simultaneously available.

Key Features

  • o Dual 2nd-Order Filter in a 16-Pin QSOP Package o High Accuracy Q Accuracy: ±0.2% Clock-to-Center Frequency Error: ±0.2% o Rail-to-Rail Input and Output Operation o Single-Supply Operation: +5V (MAX7490) or +3V (MAX7491) o Internal or External Clock o Highpass, Lowpass, Bandpass, and Notch Filters o Clock-to-Center Frequency Ratio of 100:1 o Internal Sampling-to-Center Frequency Ratio of 200:1 o Center Frequency up to 40kHz o Easily Cascaded for Multipole Filters o Low-Power Shutdown: < 1µA Sup.

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More Datasheets from Maxim Integrated (now Analog Devices)

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MAX7404 8th-Order / Lowpass / Elliptic / Switched-Capacitor Filters
MAX7405 8th-Order / Lowpass / Bessel / Switched-Capacitor Filters
MAX7407 8th-Order / Lowpass / Elliptic / Switched-Capacitor Filters
MAX7408 Switched-Capacitor Filters
MAX7409 5th-Order / Lowpass / Switched-Capacitor Filters