Maxim MAX7491CEE+

Универсальный переключаемый конденсатор40 кГц22-й2,7 В ~ 3,6 В

Overview

The MAX7490/MAX7491CEE consist of two identical low-power, 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. Two clocking options are available: self-clocking (through the use of an external capacitor) or external clocking for tighter cutoff frequency control. The clock-to-center frequency ratio is 100:1. Sampling is done at twice the clock frequency, further separating the cutoff frequency and Nyquist frequency. The MAX7490/MAX7491CEE have an internal rail splitter that establishes a precise common voltage needed for single-supply operation. The MAX7490 operates from a single +5V supply and the MAX7491CEE operates from a single +3V supply. Both devices feature a low-power shutdown mode and come in a 16-pin QSOP package.

Features

Applications

• Sample Rate Converters
• Digital Down Conversion
• D/A and A/D pre/post Filtering
• Tuning Bandwidth Expansion for HSP45116 and HSP45106
• Quadrature, Complex Flterlng
• Image Processing
• Polyphase Flterng
• Adaptive Fllterlng
• Very Narrow Band Fllters
• Zoom Spectral Analysis