LMH32401QWRGTRQ1

Overview

The LMH32401QWRGTRQ1 is an automotive-grade, single-ended-input to differential-output transimpedance amplifier. It features programmable gain of 2 kΩ or 20 kΩ and operates within a supply voltage range of 3 V to 3.45 V. The device provides a wide output swing of 1.5 VPP and draws a typical quiescent current of 30 mA. Key performance metrics include a bandwidth of 450 MHz at 2 kΩ gain and 275 MHz at 20 kΩ gain. Input-referred noise is specified at 250 nARMS for the lower gain setting and 49 nARMS for the higher gain setting.

Feature Summary

• Integrated ambient light cancellation circuit replaces AC coupling to save board space
• Built-in 100-mA protection clamp enables rapid recovery from overloaded input conditions
• Low-power shutdown mode via EN pin allows multiplexing multiple amplifiers to a single ADC

Applications

• Mechanically scanning LIDAR
• Solid-state scanning LIDAR
• Industrial robot LIDAR
• Smart munitions

Procurement Notes

Verify that the component matches the specific Q1 automotive qualification requirements. Confirm the package type is the 16-pin wettable-flank VQFN (RGT). Ensure the ordering suffix corresponds to the requested reel quantity and tape specifications. Cross-reference the manufacturer part number with official datasheets to validate revision status.

Selection Notes

Select this device for applications requiring high-speed signal processing in automotive environments. The integrated ambient light cancellation simplifies optical front-end design by eliminating external AC coupling components. Consider the trade-off between bandwidth and noise when choosing between the 2 kΩ and 20 kΩ gain settings based on photodiode capacitance.

Part Context

This component belongs to the LMH32401-Q1 family of high-speed transimpedance amplifiers designed specifically for LiDAR systems. It serves as a critical interface between photodetectors and downstream analog-to-digital converters. The Q1 designation indicates compliance with AEC-Q100 standards for automotive reliability and temperature grades.

Replacement Considerations

LMH32401YR

FAQ

How does the device handle overload conditions?

The LMH32401QWRGTRQ1 includes an integrated 100-mA protection clamp that protects the amplifier and allows it to rapidly recover from overloaded input conditions.

Can the ambient light cancellation be disabled?

Yes, the integrated ambient-light cancellation circuit can be disabled if DC coupling is required for the application.