LMH6502MA

Overview

The LMH6502MA is a wideband, low power, linear-in-dB variable gain amplifier manufactured by Texas Instruments. It features a differential input voltage-controlled gain stage followed by a high-speed current feedback operational amplifier capable of driving low impedance loads. The device offers a gain adjustment range exceeding 70dB for frequencies up to 10MHz, with a maximum gain set by external components. It operates on a single supply voltage ranging from 5V to 12V, consuming 300mW of power while maintaining a bandwidth of 130MHz and a slew rate of 1800V/µs. The output referred DC offset voltage remains below 350mV across the entire gain control voltage range.

Feature Summary

• Linear-in-dB gain control suitable for automatic gain control circuits
• Differential inputs providing common mode rejection for low level amplification
• High speed current feedback output stage for large signal handling
• Low power consumption relative to its wideband performance

Applications

• Automatic gain control (AGC) circuits
• Low level amplification where common mode rejection is required
• Applications involving signals carried over relatively long wires

Procurement Notes

Verify the specific suffix against the manufacturer's official documentation to ensure correct package type and temperature rating. Confirm RoHS compliance status as indicated in the latest datasheet revision. Check for any recent product change notices regarding pinout or electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when a wideband variable gain amplifier with linear-in-dB control is required. Ensure the application can accommodate the differential input configuration or properly terminate unused inputs for single-ended operation. Verify that the external gain-setting components align with the desired maximum gain and frequency response requirements.

Part Context

This part belongs to the LMH6502 series of wideband variable gain amplifiers. It is designed for applications requiring precise gain control over a wide dynamic range. The series includes variants with different packaging options such as SOIC-14 and TSSOP-14, all sharing the same core electrical characteristics and functionality defined by the manufacturer.

Replacement Considerations

Consult the manufacturer's datasheet for direct pin-to-pin replacements within the LMH650x family. Verify compatibility with existing circuit designs before substituting with other variable gain amplifiers.