LMH6521SQE/NOPB

Overview

The LMH6521SQE/NOPB is a high-performance dual digital variable-gain amplifier (DVGA) manufactured by Texas Instruments. It integrates two independent channels within a single package, designed for applications requiring precise gain control. The device operates with a supply voltage range typical for this series, supporting low-power operation while maintaining signal integrity. Key electrical characteristics include a slew rate of 5 kV/µs and an input voltage noise density of 1.1 nV/√Hz. It features a common-mode rejection ratio (CMRR) of 60 dB and a power supply rejection ratio (PSRR) of 60 dB. The unit is housed in a WQFN-32 surface-mount package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Dual-channel architecture providing independent gain control for two signal paths
• Digital interface for programmable gain adjustment without analog control voltages
• Low noise performance suitable for sensitive intermediate frequency and baseband processing

Applications

• Intermediate frequency (IF) amplification in multi-standard receivers
• Baseband signal conditioning for communication systems
• Automatic gain control (AGC) stages in test and measurement equipment

Procurement Notes

Verify the specific suffix 'SQE' against the manufacturer's current datasheet to confirm pinout compatibility and moisture sensitivity level. Ensure the 'NOPB' designation aligns with RoHS compliance requirements for your assembly process. Cross-reference the WQFN-32 footprint dimensions with your PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component when dual-channel gain matching and digital control are required. Compare the 1.1 nV/√Hz noise density against system noise budgets. Evaluate the WQFN-32 package thermal dissipation capabilities relative to the 182 mA operating current. Consider the 5 kV/µs slew rate for bandwidth requirements in high-speed signal paths.

Part Context

This part belongs to the LMH6517/LMH6521 family of dual DVGA devices from Texas Instruments. It shares architectural similarities with the LMH6517 but offers optimized performance metrics for specific IF and baseband applications. The family is characterized by digital gain control interfaces and low-noise specifications, distinguishing it from standard operational amplifiers or single-channel VGAs like the LMH6515.

Replacement Considerations

The LMH6517SQE/NOPB is a related dual-channel DVGA within the same product family. Verify if the specific gain step resolution or bandwidth differences between the LMH6521 and LMH6517 meet the design requirements before substituting.