MAX2038CCQ+D

Overview

The MAX2038CCQ+D is an integrated circuit featuring an 8-channel variable-gain amplifier and a programmable octal mixer array. It operates from a +5.0V supply within a 100-pin TQFP package with an exposed pad, covering a temperature range of 0°C to +70°C. The VGA section provides a total gain range of 42dB with a maximum gain of 29.5dB and ultra-low output-referred noise of 22nV/√Hz at 5MHz. It achieves a second-harmonic distortion of -70dBc and two-tone third-order intermodulation distortion of -52dBc at 5MHz input frequency. Power consumption is 120mW per channel in VGA mode.

Feature Summary

• Integrates eight fully differential variable-gain amplifiers optimized for high linearity and low noise to interface directly with 12-bit analog-to-digital converters.
• Includes a programmable octal quadrature mixer array with selectable lowpass filters and serially programmable local oscillator phase generators for continuous-wave beamforming.
• Features switchable output clamps on each amplifier channel to prevent analog-to-digital converter overdrive or saturation during signal overload.
• Supports daisy-chained digital serial interfaces for efficient programming of multiple devices using minimal wiring.

Applications

• Ultrasound imaging systems
• Continuous-wave Doppler applications
• Sonar equipment

Procurement Notes

Verify the component status as obsolete before procurement planning. Confirm that the 'D' suffix indicates dry packing and ensure compatibility with existing board layouts requiring a 100-pin TQFP-EP footprint. Review thermal dissipation requirements carefully due to power specifications. Consult manufacturer documentation for end-of-life transition strategies and valid replacement part numbers.

Selection Notes

Select this component when designing ultrasound front-ends requiring simultaneous beamforming and signal conditioning. The device is suitable for applications needing precise channel-to-channel gain matching to minimize focus errors. Consider the integrated mixer functionality if implementing continuous-wave Doppler processing without external discrete components. Ensure power supply decoupling meets the specified low-noise requirements for optimal performance.

Part Context

This device belongs to the Maxim Integrated MAX2038 family of ultrasound signal processing integrated circuits. It serves as a specialized solution for high-performance medical imaging and sonar systems. The component integrates functions typically handled by separate amplifier and mixer chips, reducing system complexity. It is designed to replace older discrete solutions while maintaining pin compatibility with related legacy parts like the MAX2037.

Replacement Considerations

Check for direct pin-compatible alternatives such as the MAX2037 series. Verify functional equivalence regarding gain ranges and mixer configurations. Evaluate thermal performance differences in alternative packages. Confirm availability status of potential substitutes to ensure long-term supply stability.

FAQ

How does the MAX2038 handle signal overload?

Each amplifier channel includes a switchable clamp that limits the output signals to prevent analog-to-digital converter overdrive or saturation.

What is the purpose of the CW_FILTER pin?

The CW_FILTER pin selects the corner frequency of the internal lowpass filter for the continuous-wave mixer path, allowing selection between 9.5MHz and 4.5MHz.

Can multiple MAX2038 devices be controlled simultaneously?

Yes, the digital serial interface allows multiple devices to be easily daisy-chained to minimize program interface wiring.