MAX7490EEE+T

Overview

The MAX7490EEE+T is a dual universal switched-capacitor filter housed in a 16-pin QSOP package. It operates from a single +5V supply and supports an operating temperature range of -40°C to +85°C. The device contains two identical low-power, rail-to-rail 2nd-order filter sections capable of generating bandpass, lowpass, highpass, and notch functions using external resistors. It features a clock-to-center frequency ratio of 100:1, with a center frequency range up to 40 kHz. Supply current is typically 4.0 mA, reducing to less than 1 µA in shutdown mode.

Feature Summary

• Dual 2nd-order filter sections providing simultaneous bandpass, lowpass, and notch outputs
• Internal rail splitter for precise common voltage establishment in single-supply operation
• Low-power shutdown mode with supply current below 1 µA
• High accuracy Q and clock-to-center frequency error specifications

Applications

• ADC anti-aliasing filters
• Post-DAC filtering
• Tunable active filters
• Multipole filter cascading
• Adaptive filtering systems

Procurement Notes

Verify the specific suffix EEE against the datasheet to confirm the industrial temperature range (-40°C to +85°C) and the +5V supply requirement. Ensure the ordering part number matches the exact pinout and package dimensions required for the PCB layout. Confirm RoHS compliance status through official manufacturer documentation prior to final procurement.

Selection Notes

Select this component when a dual-channel switched-capacitor solution is required for single-supply applications. The MAX7490 variant is specifically designed for +5V systems, whereas the MAX7491 serves +3V designs. Consider the internal oscillator or external clock options based on the required cutoff frequency stability and precision needs for the target application.

Part Context

This component belongs to the MAX7490/MAX7491 family of dual universal switched-capacitor filters manufactured by Analog Devices / Maxim Integrated. The EEE suffix denotes the industrial temperature grade and 16-pin QSOP packaging. It shares architectural similarities with the MAX7491 but differs in its specified supply voltage requirements and thermal operating limits.

Replacement Considerations

The MAX7491EEE+T is a functional alternative within the same series but requires a +3V supply instead of +5V. Other MAX7490 variants include the CEE suffix for commercial temperature ranges (0°C to +70°C). Verify that any substitute maintains the QSOP-16 package and compatible electrical characteristics.