LMH6521SQX/NOPB

Overview

The LMH6521SQX/NOPB is a high-performance dual digital variable-gain amplifier (DVGA) manufactured by Texas Instruments. It integrates two independent VGA channels within a single package, designed for applications requiring precise gain control. The device operates with a supply voltage range of 4.5 V to 5.25 V and draws approximately 182 mA of operating current. Key electrical specifications include a slew rate of 5 kV/µs, a common-mode rejection ratio (CMRR) of 60 dB, and an input offset voltage of 25 mV. It features an input voltage noise density of 1.1 nV/√Hz and a power supply rejection ratio (PSRR) of 60 dB. The component supports a maximum voltage gain of 22 dB and functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Integrates two independent variable-gain amplifier channels for dual-signal processing
• Provides digital control interface for precise gain adjustment
• Delivers low input voltage noise density for high-fidelity signal amplification
• Supports wide dynamic range operation suitable for intermediate frequency applications

Applications

• Intermediate frequency (IF) amplification in communication systems
• Baseband signal processing circuits
• Multi-standard receiver architectures requiring dual-channel gain control

Procurement Notes

Verify the specific suffix 'SQX' against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the required operating temperature range and supply voltage levels before integration. Cross-reference the ordering part number with the latest Texas Instruments documentation to avoid discrepancies in pinout or electrical characteristics.

Selection Notes

Select this component when dual-channel gain control is required within a compact footprint. Consider the 22 dB maximum gain and 5 kV/µs slew rate for bandwidth-sensitive applications. Evaluate the 182 mA current consumption against system power budgets. Verify that the WQFN-32 package fits the available PCB space and thermal management requirements.

Part Context

This device belongs to the LMH6517/LMH6521 family of dual digital VGAs from Texas Instruments. It shares functional similarities with the LMH6517 but offers specific performance optimizations for high-frequency applications. The series is designed for robust performance in demanding RF and IF environments, providing matched channel characteristics for differential signal paths.

Replacement Considerations

The LMH6517SQE/NOPB is a documented similar part within the same product family. Verify pin-to-pin compatibility and electrical parameter alignment before substitution.