LMH32404YR

Overview

The LMH32404YR is a four-channel, single-ended-input to differential-output transimpedance amplifier (TIA) designed for light detection and ranging (LIDAR) applications. It features an integrated multiplexer allowing flexible configurability between optical sensors and ADC/TDC. The device includes integrated ambient light cancellation and a 100-mA protection clamp on each channel. Operating from a 3V to 3.45V supply, it delivers a small-signal bandwidth of 350 MHz with a slew rate of 750 V/µs. The quiescent current is 28 mA per channel, reducing to 2.5 mA in low-power mode across all channels. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated multiplexer enables flexible channel switching between optical sensors and downstream processing units.
• Built-in ambient light cancellation circuit reduces board space requirements by eliminating the need for AC coupling capacitors.
• Each channel incorporates a 100-mA protection clamp to safeguard the amplifier and ensure rapid recovery from input overload conditions.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'YR' corresponds to the bare die package variant rather than the standard VQFN封装. Confirm that the procurement source provides appropriate handling protocols for exposed silicon dies, as they require specialized mounting and bonding procedures distinct from packaged components. Ensure documentation matches the active production status for this specific die revision.

Selection Notes

Select this component when designing high-speed optical front-ends requiring multi-channel integration without external multiplexing switches. The integrated ambient light cancellation is critical for systems operating under varying illumination conditions. Consider the bare die form factor if board real estate is constrained and custom packaging solutions are available. Evaluate power consumption against the required channel switching speed and standby mode utilization.

Part Context

This part belongs to the LMH32404 family of high-speed transimpedance amplifiers. While the YR suffix denotes the bare die version, other variants like LMH32404IRHFR offer the same electrical performance in a 28-pin VQFN package. The family is optimized for LiDAR and laser ranging, sharing core features such as differential outputs and integrated clamping, differing primarily in physical packaging and thermal management characteristics.

Replacement Considerations

LMH32404IRHFR