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MAX7490 - Dual Universal Switched-Capacitor Filters

Description

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

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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Datasheet preview – MAX7490

Datasheet Details

Part number MAX7490
Manufacturer Maxim
File Size 222.57 KB
Description Dual Universal Switched-Capacitor Filters
Datasheet download datasheet MAX7490 Datasheet
Additional preview pages of the MAX7490 datasheet.

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Full PDF Text Transcription

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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. Fourth-order filters can be obtained by cascading the two 2nd-order filter sections. Similarly, higher order filters can easily be created by cascading multiple MAX7490/MAX7491s.
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