MAX19791ETX+

Overview

The MAX19791ETX+ is a dual analog voltage variable attenuator designed for 50Ω systems operating from 50MHz to 4000MHz. It features an on-chip 10-bit SPI-controlled DAC for precise digital control of attenuation levels. The device provides a 23dB attenuation range per channel with low insertion loss and high linearity. Packaged in a TQFN-36 surface-mount case, it supports operation between -40°C and +100°C.

Feature Summary

• Dual-channel architecture with independent analog voltage control
• Integrated 10-bit SPI-controlled digital-to-analog converter
• Wideband operation covering 50MHz to 4000MHz frequency range
• High linearity performance suitable for precision RF applications

Applications

• Wireless infrastructure base stations
• Test and measurement equipment
• Software-defined radio systems
• RF signal conditioning modules

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm RoHS compliance status via official datasheets. Ensure storage conditions maintain integrity prior to assembly. Check for obsolescence notices or lifecycle changes directly from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when requiring wideband variable attenuation up to 4GHz with integrated digital control. Compare against MAX19790, MAX19792, and MAX19793 for different frequency ranges. Consider the TQFN-36 package constraints for PCB layout. Verify power supply requirements and thermal management needs for high-temperature environments.

Part Context

Part of the MAX1979x family of dual analog voltage variable attenuators. Shares architectural similarities with MAX19790, MAX19792, and MAX19793 but differs in operational frequency bands. Designed for integration into modern RF front-end modules requiring compact size and precise attenuation control.

Replacement Considerations

MAX19790 serves as a lower-frequency alternative (250MHz to 4000MHz). MAX19792 covers 500MHz to 4000MHz. MAX19793 operates from 1500MHz to 6000MHz. Cross-reference pinouts and control interfaces when substituting within the same product family.