Maxim MAX7490EEE+

通用开关电容器40kHz22nd4.5V ~ 5.5V

Overview

The MAX7490/MAX7491 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/MAX7491 have an internal rail splitter that establishes a precise common voltage needed for single-supply operation. The MAX7490EEE operates from a single +5V supply and the MAX7491 operates from a single +3V supply. Both devices feature a low-power shutdown mode and come in a 16-pin QSOP package.

Features

Tube Package
Supply voltage of 5V
Maximum operating temperature of 85°C
2 circuits
4MHz frequency

Surface Mount Mounting Type

Applications

There are a lot of Maxim Integrated
MAX7490EEE+ active filters applications.

• Complex Multiply-Add
• 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