LMH32404QWRHFRQ1

Overview

The LMH32404QWRHFRQ1 is a quad-channel, differential-output transimpedance amplifier designed for automotive LIDAR applications. It features AEC-Q100 Grade 1 qualification with an operating temperature range of –40°C to +125°C. The device provides a fixed gain of 20 kΩ and achieves a small-signal bandwidth of 350 MHz with an input-referred noise of 56 nARMS at 250 MHz. Key electrical parameters include a slew rate of 750 V/µs, quiescent current of 28 mA per channel in normal mode, and a standby current of 10 mA per channel. It integrates a 100-mA protection clamp and ambient light cancellation circuitry.

Feature Summary

• Integrated multiplexer enables flexible configurability between optical sensors and ADC/TDC inputs.
• Built-in ambient light cancellation circuit reduces board space requirements compared to AC coupling methods.
• Each channel includes a 100-mA protection clamp for rapid recovery from overloaded input conditions.
• Low-power mode functionality allows significant power conservation when the amplifier is not actively used.

Applications

• Mechanically scanning LIDAR systems
• Solid-state scanning LIDAR architectures
• Laser distance meters
• Safety area scanners

Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel specifications. Confirm that the component carries the Q1 designation to ensure compliance with AEC-Q100 automotive reliability standards. Check datasheet revision history for any updates to electrical characteristics or recommended operating conditions prior to finalizing procurement orders.

Selection Notes

Select this component for high-speed photodiode interfaces requiring differential outputs and integrated signal conditioning. Ensure the system design accommodates the 20 kΩ fixed gain and 350 MHz bandwidth constraints. Verify that the power supply architecture supports the specified voltage range and thermal dissipation requirements for the VQFN-28 package within the target operating temperature extremes.

Part Context

This part belongs to the LMH32404-Q1 family of high-speed transimpedance amplifiers. It is specifically engineered for automotive-grade LiDAR and laser ranging applications. The device consolidates multiple functions including amplification, clamping, and ambient light cancellation into a single compact package, simplifying the front-end design for multi-channel optical detection systems.

Replacement Considerations

LMH32404-Q1